Android高手进阶教程
【网学网提醒】：以下是网学会员为您推荐的Android高手进阶教程，希望本篇文章对您学习有所帮助。
Android高手进阶教程一)-------Android常用名令集锦高手进阶教程(一
大家好，今天我们要讲的是android开发中，比较常用的名令集锦，在我们开发中难免用到Android命令，有些确实命令确实很有用处。特别对于一些初学者来说，命令根本没有想过用也不会用，比如他们想安装一个.apk文件到模拟器上面，但是他们不会启动模拟器，他们只会先启动Eclipse，然后在启动模拟器，这样不但浪费时间，而且Eclipse又占用你的内存。这也是我为什么总结这篇文章的原因了，希望对大家有所帮助。如果想让系统认识你输入的命令(如:输入android命令)有两种方法：1.设置环境变量.(和设置java路径一样，具体网上查哦!);2.直接进入你SDK里tools目录(cd:sdkpath/tools)这样也OK.不过在此建议使用第一种!下面就是自己的小小总结:1.android:对你只要输入android就会出来,SDKandAVDmanager我们可以更新SDK,增删修改AVD.效果如下图:
2.androidlistavds:这条命令将会列出所有我们创建的android模拟器.效果如下图:
3.androidlisttargets:这条命令是列出我们所有的SDK可用版本,效果如下图:
4.adbdevices:这条命令是列出所有装载的设置，效果如下图(一个是模拟器，一个是真机):
5.adbshell:这条命令是进入设备根目录/,取得对设备的控制权，如输入ls命令等。
6.adbinstallXXX.apk.这条命令是安装apk文件，如果你有多个设备(而你想把apk安装到emulator-5554这个模拟器上)则要输入:adbinstall-semulator-5554D:/XXX.apk.7.emulator-avdavdname这条命令将启动一个模拟器，初学者学会这条，就不用下次启动模拟器的时候还要打开Eclipse了。用法如下:
8.mksdcard256Md:\sdcard.img对于模拟器当然要创建sdcard了，这条命令是将在D盘下生成256M的sdcard.9.adbpull
Android高手进阶教程二)之----AndroidLauncher抽屉类高手进阶教程(二之SlidingDrawer的使用
最近在研究Lanucher,看了源码，发现了SlidingDrawer这个类，也就是所谓的"抽屉"类。它的用法很简单，要
包括handle,和content.handle就是当你点击它的时候，content要么抽抽屉要么关抽屉。别的不多说了，具体步骤如下.1.新建Android工程,命名为SlidingDrawer.2.准备素材,在这里我的图标是用Launcher2里面的图标，放在drawable-hdpi
文件夹目录结构如下:
3.设置main.xml布局:代码如下:viewplaincopytoclipboardprint?
的比较简单呵呵，如果想深入了解，大家看Launcher源码吧！
Android高手进阶教程三)之----Android中自定义View的高手进阶教程(三之应用
大家好我们今天的教程是在Android教程中自定义View的学习，对于初学着来说，他们习惯了Android传统的页面布局方式，如下代码:viewplaincopytoclipboardprint?
viewplaincopytoclipboardprint?其中AextendsLinerLayout,BextendsTextView.其中AextendsLinerLayout,BextendsTextView.为了帮助大家更容易理解，我写了一个简单的Demo,具体步骤如下：首先新建一个Android工程命名为ViewDemo.然后自定义一个View类，命名为MyView(extendsView).代码如下:viewplaincopytoclipboardprint?packagecom.android.tutor;importandroid.content.Context;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.graphics.Rect;importandroid.graphics.Paint.Style;importandroid.util.AttributeSet;importandroid.view.View;publicclassMyViewextendsVie
w{privatePaintmPaint;privateContextmContext;privatestaticfinalStringmString="WelcometoMrWei'sblog";publicMyView(Contextcontext){super(context);}publicMyView(Contextcontext,AttributeSetattr){super(context,attr);}@OverrideprotectedvoidonDraw(Canvascanvas){//TODOAuto-generatedmethodstubsuper.onDraw(canvas);mPaint=newPaint();//设置画笔颜色mPaint.setColor(Color.RED);//设置填充mPaint.setStyle(Style.FILL);
//画一个矩形,前俩个是矩形左上角坐标，后面俩个是右下角坐标canvas.drawRect(newRect(10,10,100,100),mPaint);mPaint.setColor(Color.BLUE);//绘制文字canvas.drawText(mString,10,110,mPaint);}}packagecom.android.tutor;importandroid.content.Context;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.graphics.Rect;importandroid.graphics.Paint.Style;importandroid.util.AttributeSet;importandroid.view.View;publicclassMyViewextendsView{privatePaintmPaint;privateContextmContext;privatestaticfinalStringmString="WelcometoMrWei'sblog";publicMyView(Contextcontext){super(context);}publicMyView(Contextcontext,AttributeSetattr){super(context,attr);}@OverrideprotectedvoidonDraw(Canvascanvas){//TODOAuto-generatedmethodstubsuper.onDraw(canvas);mPaint=newPaint();//设置画笔颜色mPaint.setColor(Color.RED);//设置填充mPaint.setStyle(Style.FILL);
//画一个矩形,前俩个是矩形左上角坐标，后面俩个是右下角坐标canvas.drawRect(newRect(10,10,100,100),mPaint);mPaint.setColor(Color.BLUE);//绘制文字canvas.drawText(mString,10,110,mPaint);}}然后将我们自定义的View加入到main.xml布局文件中,代码如下:viewplaincopytoclipboardprint?
最后执行之，效果如下图:
OK,大功告成，今天就写到这里
Android高手进阶教程四)之----Android中自定义属性手进阶教程(四之(attr.xml,TypedArray)的使用的使用
今天我们的教程是根据前面一节扩展进行的，如果你没有看,请
点击Android高手进阶教程(三)查看第三课,这样跟容易方便你的理解!在xml文件里定义控件的属性，我们已经习惯了android:attrs="",那么我们能不能定义自己的属性能，比如:test:attrs=""呢？答案是肯定的.好了我就不卖关子了，直接进入主题。大致以下步骤:一、在res/values文件下定义一个attrs.xml文件.代码如下:viewplaincopytoclipboardprint?一、在res/values文件下定义一个attrs.xml文件.代码如下:
TypedArraya=context.obtainStyledAttributes(attrs,R.styleable.MyView);inttextColor=a.getColor(R.styleable.MyView_textColor,0XFFFFFFFF);floattextSize=a.getDimension(R.styleable.MyView_textSize,36);mPaint.setTextSize(textSize);mPaint.setColor(textColor);a.recycle();}MyView.java全部代码如下:viewplaincopytoclipboardprint?packagecom.android.tutor;importandroid.content.Context;importandroid.content.res.TypedArray;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.graphics.Rect;importandroid.graphics.Paint.Style;importandroid.util.AttributeSet;importandroid.view.View;publicclassMyViewextendsView{privatePaintmPaint;privateContextmContext;privatestaticfinalStringmString="WelcometoMrWei'sblog";publicMyView(Contextcontext){super(context);mPaint=newPaint();}pu
blicMyView(Contextcontext,AttributeSetattrs){super(context,attrs);mPaint=newPaint();TypedArraya=context.obtainStyledAttributes(attrs,R.styleable.MyView);inttextColor=a.getColor(R.styleable.MyView_textColor,0XFFFFFFFF);floattextSize=a.getDimension(R.styleable.MyView_textSize,
36);mPaint.setTextSize(textSize);mPaint.setColor(textColor);a.recycle();}@OverrideprotectedvoidonDraw(Canvascanvas){//TODOAuto-generatedmethodstubsuper.onDraw(canvas);//设置填充mPaint.setStyle(Style.FILL);//画一个矩形,前俩个是矩形左上角坐标，后面俩个是右下角坐标canvas.drawRect(newRect(10,10,100,100),mPaint);mPaint.setColor(Color.BLUE);//绘制文字canvas.drawText(mString,10,110,mPaint);}}packagecom.android.tutor;importandroid.content.Context;importandroid.content.res.TypedArray;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.graphics.Rect;importandroid.graphics.Paint.Style;importandroid.util.AttributeSet;importandroid.view.View;publicclassMyViewextendsView{privatePaintmPaint;privateContextmContext;privatestaticfinalStringmString="WelcometoMrWei'sblog";publicMyView(Contextcontext){super(context);mPaint=newPaint();}publicMyView(Contextcontext,AttributeSetattrs){super(context,attrs);
mPaint=newPaint();TypedArraya=context.obtainStyledAttributes(attrs,R.styleable.MyView);inttextColor=a.getColor(R.styleable.MyView_textColor,0XFFFFFFFF);floattextSize=a.getDimension(R.styleable.MyView_textSize,36);mPaint.setTextSize(textSize);mPaint.setColor(textColor);a.recycle();}@OverrideprotectedvoidonDraw(Canvascanvas){//TODOAuto-generatedmethodstubsuper.onDraw(canvas);//设置填充mPaint.setStyle(Style.FILL);//画一个矩形,前俩个是矩形左上角坐标，后面俩个是右下角坐标canvas.drawRect(newRect(10,10,100,100),mPaint);mPaint.setColor(Color.BLUE);//绘制文字canvas.drawText(mString,10,110,mPaint);}}三、将我们自定义的MyView加入布局main.xml文件中，平且使用自定义属性,自定义属性必须加上:xmlns:test="schemas.android/apk/res/com.android.tutor"蓝色是自定义属性的前缀，红色是我们包名.main.xml全部代码如下:viewplaincopytoclipboardprint?
四、运行之效果如下图:
今天就到此结束
高手进阶教程(----AndroidAndroid高手进阶教程(五)之----Android中LayoutInflater的使用大家好我们这一节讲的是LayoutInflater的使用,在实际开发种LayoutInflater这个类还是非常有用的,它的作用类似于findViewById(),不同点是LayoutInflater是用来找layout下xml布局文件，并且实例化！而findViewById()是找具体xml下的具体widget控件(如:Button,TextView等)。为了让大家容易理解我做了一个简单的Demo,主布局main.xml里有一个TextView和一个Button，当点击Button，出现Dialog,而这个Dialog的布局方式是我们在layout目录下定义的custom_dialog.xml文件(里面左右分布，左边ImageView,右边TextView)。
效果图如下:
下面我将详细的说明Demo的实现过程:1、新建一个Android工程，我们命名为LayoutInflaterDemo.2、修改main.xml布局，里面主要在原来基础上增加了一个Button.代码如下:viewplaincopytoclipboardprint?
button=(Button)findViewById(R.id.button);button.setOnClickListener(this);}@OverridepublicvoidonClick(Viewv){showCustomDialog();}publicvoidshowCustomDialog(){AlertDialog.Builderbuilder;AlertDialogalertDialog;ContextmContext=LayoutInflaterDemo.this;//下面俩种方法都可以////LayoutInflaterinflater=getLayoutInflater();LayoutInflaterinflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewlayout=inflater.inflate(R.layout.custom_dialog,null);TextViewtext=(TextView)layout.findViewById(R.id.text);text.setText("Hello,WelcometoMrWei'sblog!");ImageViewimage=(ImageView)layout.findViewById(R.id.image);image.setImageResource(R.drawable.icon);builder=newAlertDialog.Builder(mContext);builder.setView(layout);alertDialog=builder.create();alertDialog.show();}}packagecom.android.tutor;importandroid.app.Activity;importandroid.app.AlertDialog;importandroid.content.Context;importandroid.os.Bundle;importandroid.view.LayoutInflater;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.ImageView;importandroid.widget.TextView;
publicclassLayoutInflaterDemoextendsActivityimplementsOnClickListener{privateButtonbutton;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);button=(Button)findViewById(R.id.button);button.setOnClickListener(this);}@OverridepublicvoidonClick(Viewv){showCustomD
ialog();}publicvoidshowCustomDialog(){AlertDialog.Builderbuilder;AlertDialogalertDialog;ContextmContext=LayoutInflaterDemo.this;//下面俩种方法都可以////LayoutInflaterinflater=getLayoutInflater();LayoutInflaterinflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewlayout=inflater.inflate(R.layout.custom_dialog,null);TextViewtext=(TextView)layout.findViewById(R.id.text);text.setText("Hello,WelcometoMrWei'sblog!");ImageViewimage=(ImageView)layout.findViewById(R.id.image);image.setImageResource(R.drawable.icon);builder=newAlertDialog.Builder(mContext);builder.setView(layout);alertDialog=builder.create();alertDialog.show();}}5、最后执行之，点击Button，将得到上述效果。
Android高手进阶教程(六)之----Android中MenuInflater的使用(布局定义菜单)!大家好，我们上一节讲的是LayoutInflater的使用，而这一节我将讲一下MenuInflater,顾名思义，LayoutInflater是用来解析定义在layout下的布局文件，那么MenuInflater是不是用来解析定义在menu目录下的菜单布局文件呢？恭喜你答对了！(*^__^*)嘻嘻……我们传统意义上的定义菜单感觉比较繁琐，当我们使用MenuInflater来生成菜单，你会发现是多么的爽朗，呵呵，我今天的小Demo,是定义四个菜单，并且实现了一个菜单事件。就是我们点击设置(Setting)菜单，进入手机设置状态！下面看一下效果图:
下面是实现Demo的详细步骤:一、建立一个Android工程我们命名为MenuInflaterDemo.二、在res目录下创建menu目录，并且创建options_menu.xml(我们定义的菜单)文件,代码如下:viewplaincopytoclipboardprint?
码很少哦，我这里只写了第四个菜单(Settings)的响应事件.全部代码如下:viewplaincopytoclipboardprint?packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Intent;importandroid.os.Bundle;importandroid.view.Menu;importandroid.view.MenuInflater;importandroid.view.MenuItem;publicclassMenuInflaterDemoextendsActivity{@Override
publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);}@OverridepublicbooleanonCreateOptionsMenu(Menumenu){MenuInflaterinflater=getMenuInflater();inflater.inflate(R.menu.options_menu,menu);returntrue;}@OverridepublicbooleanonOptionsItemSelected(MenuItemitem){switch(item.getItemId()){caseR.id.menu_add:break;caseR.id.menu_wallaper:break;caseR.id.menu_search:break;caseR.id.menu_setting:showSettings();break;}returnsuper.onOptionsItemSelected(item);}
privatevoidshowSettings(){finalIntentsettings=Intent(android.provider.Settings.ACTION_SETTINGS);settings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);startActivity(settings);}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Intent;importandroid.os.Bundle;new
importandroid.view.Menu;importandroid.view.MenuInflater;importandroid.view.MenuItem;publicclassMenuInflaterDemoextendsActivity{@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);}@OverridepublicbooleanonCreateOptionsMenu(Menumenu){MenuInflaterinflater=getMenuInflater();inflater.inflate(R.menu.options_menu,menu);returntrue;}@OverridepublicbooleanonOptionsItemSelected(MenuItemitem){switch(item.getItemId()){caseR.id.menu_add:break;caseR.id.menu_wallaper:break;caseR.id.menu_search:break;caseR.id.menu_setting:showSettings();break;}returnsuper.onOptionsItemSelected(item);}
privatevoidshowSettings(){finalIntentsettings=Intent(android.provider.Settings.ACTION_SETTINGS);settings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);startActivity(settings);}new
}四、运行代码之，点击模拟器上的menu按钮将会出现上述效果图!
高手进阶教程(----Android的使用!Android高手进阶教程(七)之----Android中Preferences的使用!大家好，我们这一节讲的是AndroidPreferences的学习，Preferences在Android当中被用来记录应用，以及用户喜好等等，它可以用来保存简单的数据类型，如Int,Double,Boolean等。Preferences中保存的数据可以理解为Map型。我们通过PreferenceManager以及getDefaultSharedPreferences(Context)来获取它，比如当我们想获得整数我们可以用getInt(Stringkey,intdefVal).获取里面的某个键值，当我们想修改时候我们用putInt(Stringkey,intnewVal)，最后用edit(
),方法提交!千万不要忘记了哦~为了让大家跟好的理解我做了一个简单的Demo,程序主要有个TextView控件，上面写着用户使用改应用的次数。效果如下图所示:
下面是实现Demo的大体步骤:一、新建一个Android工程命名为:PreferencesDemo。二、在修改main.xml布局文件，这里只是在TextView控件里加了一个id.代码如下:viewplaincopytoclipboardprint?
SharedPreferencesmPerferences=PreferenceManager.getDefaultSharedPreferences(this);intcounter=mPerferences.getInt("counter",0);TextViewmTextView=(TextView)findViewById(R.id.text);mTextView.setText("Thisapphasbeenstarted"+counter+"times.");SharedPreferences.EditormEditor=mPerferences.edit();mEditor.putInt("counter",++counter);mEditormit();}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.SharedPreferences;importandroid.os.Bundle;importandroid.preference.PreferenceManager;importandroid.widget.TextView;publicclassPreferencesDemoextendsActivity{/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);
SharedPreferencesmPerferences=PreferenceManager.getDefaultSharedPreferences(this);intcounter=mPerferences.getInt("counter",0);TextViewmTextView=(TextView)findViewById(R.id.text);mTextView.setText("Thisapphasbeenstarted"+counter+"times.");SharedPreferences.EditormEditor=mPerferences.edit();mEditor.putInt("counter",++counter);
mEditormit();}}四、运行代码，实现上述效果.五、查看Preferences文件，首先打开命令终
端:adbshell一下，然后cddata/data进入该目录，ls一下我们会发现一大堆包文件，入下图所示:
cdcom.android.tutor(这里是我程序的包名)/shared_prefs,ls一下会发现.xml文件如下图:
打开.xml文件，格式如下(为什么这样大家自己去理解):viewplaincopytoclipboardprint?
高手进阶教程(----Android开发案例(世界杯倒计时!)Android高手进阶教程(八)之----AndroidWidget开发案例(世界杯倒计时!)今天我们要写一下AndroidWidget的开发，由于快点凌晨，我就不说的太具体了，同志们就模仿吧！首先看一下效果图:
下面是Demo的详细步骤:一、新建一个Android工程命名为:WidgetDemo.
二、准备素材，一个是Widget的图标，一个是Widget的背景。存放目录如下图:
三、修改string.xml文件如下:viewplaincopytoclipboardprint?
六、修改WidgetDemo.java代码如下:viewplaincopytoclipboardprint?packagecom.android.tutor;importjava.util.Calendar;importjava.util.Date;importjava.util.GregorianCalendar;importjava.util.Timer;importjava.util.TimerTask;importandroid.appwidget.AppWidgetManager;importandroid.appwidget.AppWidgetProvider;importandroid.content.ComponentName;importandroid.content.Context;importandroid.widget.RemoteViews;publicclassWidetDemoextendsAppWidgetProvider{/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonUpdate(ContextappWidgetManager,int[]appWidgetIds){Timertimer=newTimer();timer.scheduleAtFixedRate(newMyTime(context,appWidgetManager),1,60000);super.onUpdate(context,appWidgetManager,appWidgetIds);}
context,
AppWidgetManager
privateclassMyTimeextendsTimerTask{RemoteViewsremoteViews;AppWidgetManagerappWidgetManager;ComponentNamethisWidget;publicMyTime(Contextcontext,AppWidgetManagerappWidgetManager){this.appWidgetManager=appWidgetManager;remoteViews=newRemoteViews(context.getPackageName(),R.layout.main);thisWidgetComponentName(context,WidetDemo.class);}=new
publicvoidrun(){Datedate=newDate();Calendarcalendar=newGregorianCalendar(2010,06,11);longdays=(((calendar.getTimeInMillis()-date.getTime())/1000))/86400;remoteViews.setTextViewText(R.id.wordcup,"距离南非世界杯还有"+days+"天");appWidgetManager.updateAppWidget(thisWidget,remoteViews);}}}packagecom.android.tutor;importjava.util.Calendar;importjava.util.Date;importjava.util.GregorianCalendar;importjava.util.Timer;importjava.util.TimerTask;importandroid.appwidget.AppWidgetManager;importandroid.appwidget.AppWidgetProvider;importandroid.content.ComponentName;importandroid.content.Context;importandroid.widget.RemoteViews;publicclassWidetDemoextendsAppWidgetProvider{/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonUpdate(Contextcontext,AppWidgetManagerappWidgetManager,int[]appWidgetIds){Timertimer=newTimer();timer.scheduleAtFixedRate(newMyTime(context,appWidgetManager),1,60000);super.onUpdate(context,appWidgetManager,appWidgetIds);}
privateclassMyTimeextendsTimerTask{RemoteViewsremoteViews;AppWidgetManagerappWidgetManager;
ComponentNamethisWidget;publicMyTime(Contextcontext,AppWidgetManagerappWidgetManager){this.appWidgetManager=appWidgetManager;remoteViews=newRemoteViews(context.getPackageName(),R.layout.main);thisWidget=newComponentName(context,WidetDemo.class);}publicvoidrun(){Datedate=newDate();Calendarcalendar=newGregorianCalendar(2010,06,11);longdays=(((calendar.getTimeInMillis()-date.getTime())/1000))/86400;remoteViews.setTextViewText(R.id.wordcup,"距离南非世界杯还有"+days+"天");appWidgetManager.updateAppWidget(thisWidget,remoteViews);}}}七、修改配置文件AndroidManifest.xml，代码如下:viewplaincop
ytoclipboardprint?
Android高手进阶教程九)之----AndroidHandler的使用高手进阶教程(九之
大家好我们这一节讲的是AndroidHandler的使用,在讲Handler之前，我们先提个小问题，就是如何让程序5秒钟更新一下Title.首先我们看一下习惯了Java编程的人，在不知道Handler的用法之前是怎么样写的程序,代码如下所示:viewplaincopytoclipboardprint?packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;
importandroid.app.Activity;importandroid.os.Bundle;publicclassHandlerDemoextendsActivity{//title为setTitle方法提供变量,这里为了方便我设置成了int型privateinttitle=0;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Timertimer=newTimer();timer.scheduleAtFixedRate(newMyTask(),1,5000);}privateclassMyTaskextendsTimerTask{@Overridepublicvoidrun(){setTitle("WelcometoMrWei'sblog"+title);title++;}}}packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;importandroid.app.Activity;importandroid.os.Bundle;publicclassHandlerDemoextendsActivity{//title为setTitle方法提供变量,这里为了方便我设置成了int型privateinttitle=0;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Timertimer=newTimer();timer.scheduleAtFixedRate(newMyTask(),1,5000);}privateclassMyTaskextendsTimerTask{@Override
publicvoidrun(){setTitle("
WelcometoMrWei'sblog"+title);title++;}}}然而当我们执行程序，并不能达到我们预期的效果，所以Android引进了Handler这个特殊的类，可以说它是Runnable和Activity交互的桥梁，所以我们只要在run方法中发送Message,而在Handler里，通过不同的Message执行不同的任务。所以我们修改后的代码如下:viewplaincopytoclipboardprint?packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;importandroid.app.Activity;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;publicclassHandlerDemoextendsActivity{//title为setTitle方法提供变量,这里为了方便我设置成了int型privateinttitle=0;privateHandlermHandler=newHandler(){publicvoidhandleMessage(Messagemsg){switch(msg.what){case1:updateTitle();break;}};};publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Timertimer=newTimer();timer.scheduleAtFixedRate(newMyTask(),1,5000);}privateclassMyTaskextendsTimerTask{
@Overridepublicvoidrun(){Messagemessage=newMessage();message.what=1;mHandler.sendMessage(message);}}
publicvoidupdateTitle(){setTitle("WelcometoMrWei'sblog"+title);title++;}}packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;importandroid.app.Activity;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;publicclassHandlerDemoextendsActivity{//title为setTitle方法提供变量,这里为了方便我设置成了int型privateinttitle=0;privateHandlermHandler=newHandler(){publicvoidhandleMessage(Messagemsg){switch(msg.what){case1:updateTitle();break;}};};publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);Timertimer=newTimer();
timer.scheduleAtFixedRate(newMyTask(),1,5000);}privateclassMyTaskextendsTimerTask{@Overridepublicvoidrun(){Messagemessage=newMessage();message.what=1;mHandler.sendMessage(message);}}
publicvoidupdateTitle(){setTitle("WelcometoMrWei'sblog"+title);title++;}}下面我们看一下效果图:
高手进阶教程(----AndroidAndroid高手进阶教程(十)之----AndroidPopupWindow的使用大家好，我们这一节讲的是AndroidPopupWindow的使用!在我理解其实PopupWindow其实类似于一个不能动的Widget(仅从显示效果来说!)它是浮在别的窗口之上的.下面我将给大家做一个简单的Demo，类似于音乐播放器的Widget的效果，点击Button的时候出来PopupWindow,首先我们看一下效果图:
下面是核心代码:viewplaincopytoclipboardprint?packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Context;importandroid.os.Bundle;importandroid.view.Gravity;importandroid.view.Layou
tInflater;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.view.ViewGroup.LayoutParams;importandroid.widget.Button;importandroid.widget.PopupWindow;publicclassPopupWindowDemoextendsOnClickListener{privateButtonbtn;
Activity
implements
publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);
btn=(Button)findViewById(R.id.btn);btn.setOnClickListener(this);}@OverridepublicvoidonClick(Viewv){ContextmContext=PopupWindowDemo.this;if(v.getId()==R.id.btn){LayoutInflatermLayoutInflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewmusic_popunwindwow=mLayoutInflater.inflate(R.layout.music_popwindow,null);PopupWindowmPopupWindow=newPopupWindow(music_popunwindwow,LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);mPopupWindow.showAtLocation(findViewById(R.id.main),Gravity.RIGHT|Gravity.BOTTOM,0,0);}}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Context;importandroid.os.Bundle;importandroid.view.Gravity;importandroid.view.LayoutInflater;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.view.ViewGroup.LayoutParams;importandroid.widget.Button;importandroid.widget.PopupWindow;publicclassPopupWindowDemoextendsActivityimplementsOnClickListener{privateButtonbtn;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);btn=(Button)findViewById(R.id.btn);btn.setOnClickListener(this);}
@OverridepublicvoidonClick(Viewv){ContextmContext=PopupWindowDemo.this;if(v.getId()==R.id.btn){LayoutInflatermLayoutInflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewmusic_popunwindwow=mLayoutInflater.inflate(R.layout.music_popwindow,null);PopupWindowmPopupWindow=newPopupWindow(music_popunwindwow,LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);mPopupWindow.showAtLocation(findViewById(R.id.main),Gravity.RIGHT|Gravity.BOTTOM,0,0);}}}
需要强调的是这里PopupWindow必须有某个事件触发才会显示出来，不然总会抱错，不信大家可以试试!随着这个问题的出现，就会同学问了，那么我想初始化让PopupWindow显示出来，那怎么办了，不去寄托于其他点击事件，在这里我用了定时器Timer来实现这样的效果,当然这里就要用到Handler了，如果大家不理解的可以返回Android高手进阶教程(九)之----AndroidHandler的使用!!看一看，加深了解:下面是核心代码:viewplaincopytoclipboardprint?packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;importandroid.app.Activity;importandroid.content.Context;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;importandroid.view.Gravity;importandroid.view.LayoutInflater;
importandroid.view.View;importandroid.view.ViewGroup.LayoutParams;importandroid.widget.PopupWindow;publicclassPopupWindowDemoextendsActivity{privateHandlermHandler=newHandler(){
publicvoidhandleMessage(Messagemsg){switch(msg.what){case1:showPopupWindow();break;}};};publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);//createthetimerTimertimer=newTimer();timer.schedule(newinitPopupWindow(),100);}privateclassinitPopupWindowextendsTimerTask{@Overridepublicvoidrun(){Messagemessage=newMessage();message.what=1;mHandler.sendMessage(message);}}
publicvoidshowPopupWindow(){ContextmContext=PopupWindowDemo.this;LayoutInflatermLayoutInflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewmusic_popunwindwow=mLayoutInflater.inflate(R.layout.music_popwindow,null);PopupWindowmPopupWindow=newPopupWindow(music_popunwindwow,LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);mPopupWindow.showAtLocation(findViewById(R.id.main),Gravity.CENTER,0,0);}
}packagecom.android.tutor;importjava.util.Timer;importjava.util.TimerTask;importandroid.app.Activity;importandroid.content.Context;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;importandroid.view.Gravity;importandroid.view.LayoutInflater;importandroid.view.View;importandroid.view.ViewGroup.LayoutParams;importandroid.widget.PopupWindow;publicclassPopupWindowDemoextendsActivity{privateHandlermHandler=newHandler(){publicvoidhandleMessage(Messagemsg){switch(msg.what){case1:showPopupWindow();break;}};};publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);//createthetimerTimertimer=newTimer();timer.schedule(newinitPopupWindow(),100);}privateclassinitPopupWindowextendsTimerTask{@Overridepublicvoidrun(){Messagemessage=newMessage();message.what=1;mHandler.sendMessage(message);}
}
publicvoidshowPopupWindow(){ContextmContext=PopupWindowDemo.this;LayoutInflatermLayoutInflater=(LayoutInflater)mContext.getSystemService(LAYOUT_INFLATER_SERVICE);Viewmusic_popunwindwow=mLayoutInflater.inflate(R.layout.music_popwindow,null);PopupWindowmPopupWindow=newPopupWindow(music_popunwindwow,LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);mPopupWindow.showAtLocation(findViewById(R.id.main),Gravity.CENTER,0,0);}}效果如下图:
Android高手进阶教程十一之----Android通用获取Ip的方法判断手机是否联网的方法）高手进阶教程(十一十一)之（判断手机是否联网的方法）大家好，我们这一节讲一下，Android获取Ip的一些方法,在我们开发中，有判断手机是否联网，或者想获得当前手机的Ip地址，当然WIFI连接的和我们3G卡的Ip地址当然是不一样的.
首先我尝试了如下方法:viewplaincopytoclipboardprint?WifiManagerwifiManager=(WifiManager)getSystemService(WIFI_SERVICE);WifiInfowifiInfo=wifiManager.getConnectionInfo();intipAddress=wifiInfo.getIpAddress();WifiManagerwifiManager=(WifiManager)getSystemService(WIFI_SERVICE);WifiInfowifiInfo=wifiManager.getConnectionInfo();intipAddress=wifiInfo.getIpAddress();但是获得的居然是一个整数，我尝试了用些数学方法都没有成功!,所以这种方法不可取!最后查了一些资料，发现如下方法是比较通用的，我尝试了WIFI和G3卡，都获取了争取的Ip地址:代码如下:viewplaincopytoclipboardprint?publicStringgetLocalIpAddress(){try{for(Enumeration
InetAddressinetAddress=enumIpAddr.nextElement();if(!inetAddress.isLoopbackAddress()){returninetAddress.getHostAddress().toString();}}}}catch(SocketExceptionex){Log.e(LOG_TAG,ex.toString());}returnnull;}当我的手机处于飞行状态是，获得Ip地址为空，刚好符合要求!!!
高手进阶教程(十二)----AndroidAndroid高手进阶教程(十二)之----Android在一个应用中如何启动另外一个已安装的应用今天晚上Jimmy问了我一个问题，就是如何在一个应用中通过某个事件，而去启动另外一个已安装的应用。所以愿意和大家分享一下!而为了能让大家更加容易的理解，我写了一个简单的Demo，我们的程序有俩个按钮，其中一个点击会启动我自己写的应用(一个3D应用为例)，而另外一个按钮会启动系统自带的应用(如，日历，闹钟，计算器等等).这里我一日历为例子!首先看一下我们的效果图(点击第一个按钮为例):
下面是Demo的详细步骤:一、新建一个Android工程命名为StartAnotherApplicationDemo.二、修改main.xml布局,代码如下:viewplaincopytoclipboardprint?
privateButtonmButton01,mButton02;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);mButton01=(Button)findViewById(R.id.button);mButton02=(Button)findViewById(R.id.start_calender);//-----启动我们自身写的程序-----------------mButton01.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){//-----核心部分-----前名一个参数是应用程序的包名,后一个是这个应用程序的主Activity名Intentintent=newIntent();intent.setComponent(newComponentName("com.droidnova.android.games.vortex","com.droidnova.android.games.vortex..Vortex"));startActivity(intent);}});//-----启动系统自带的应用程序-----------------mButton02.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){Intentintent=newIntent();intent.setComponent(newComponentName("com.android.calendar","com.android.calendar.LaunchActivity"));startActivity(intent);}});}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.ComponentName;importandroid.content.Intent;importandroid.os.Bundle;importandroid.view.View;importandroid.widget.Button;publicclassStartAnotherApplicationDemoextendsActivity{privateButtonmButton01,mButton02;
publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);mButton01=(Button)findViewById(R.id.button);mButton02=(Button)findViewById(R.id.start_calender);//-----启动我们自身写的程序-----------------mButton01.setOnClickListener(newButton.
OnClickListener(){publicvoidonClick(Viewv){//-----核心部分-----前名一个参数是应用程序的包名,后一个是这个应用程序的主Activity名Intentintent=newIntent();intent.setComponent(newComponentName("com.droidnova.android.games.vortex","com.droidnova.android.games.vortex..Vortex"));startActivity(intent);}});//-----启动系统自带的应用程序-----------------mButton02.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){Intentintent=newIntent();intent.setComponent(newComponentName("com.android.calendar","com.android.calendar.LaunchActivity"));startActivity(intent);}});}}四、执行之，将得到如上效果!
高手进阶教程(十三)----AndroidAndroid高手进阶教程(十三)之----Android数据库SQLiteDatabase的使用
大家好，好久没有更新博客了，最近由于身体不适让大家久等了，好了，直接进入主题~Android提供了三种数据存储方式，第一种是文件存储;第二种是SharedPreferences存储;第三种就是数据库SQLiteDatabase存储。文件存储我就不用多说了，而SharedPreferences可以存取简单的数据(int,double,float.etc)，它经常用于数据缓存，因为它读取存储简单。详细可以参见本系列。Android高手进阶教程(七)之----Android中Preferences的使用!今天我们将讲一下SQLiteDatabase的使用。而掌握SqliteDatabase，将会我们接下来掌握ContentProvider打下良好的基石。为了让大家更好的掌握，我们手把手完成该节的Demo。第一步：新建一个Android工程，命名为SQLiteDatabaseDemo.
第二步:创建一个新的类BooksDB.java这个类要继承于android.database.sqlite.SQLiteOpenHelper抽象类，我们要实现其中两个方法：onCreate(),onUpdate.具体代码如下：
viewplaincopytoclipboardprint?packagecom.android.tutor;importandroid.content.ContentValues;importandroid.content.Context;importandroid.database.Cursor;importandroid.database.sqlite.SQLiteDatabase;importandroid.database.sqlite.SQLiteOpenHelper;publicclassBooksDBextendsSQLiteOpenHelper{privatefinalstaticStringDATABASE_NAME="BOOKS.db";privatefinalstaticintDATABASE_VERSION=1;privatefinalstaticStringTABLE_NAME="books_table";publicfinalstaticStringBOOK_ID="book_id";publicfinalstaticStringBOOK_NAME="book_name";publicfinalstaticStringBOOK_AUTHOR="book_author";publicBooksDB(Contextcontext){//TODOAuto-generatedconstructorstubsuper(context,DATABASE_NAME,null,DATABASE_VERSION);}//创建table@OverridepublicvoidonCreate(SQLiteDatabasedb){Stringsql="CREATETABLE"+TABLE_NAME+"("+BOOK_ID+"INTEGERprimarykeyautoincrement,"+BOOK_NAME+"text,"+BOOK_AUTHOR+"text);";db.execSQL(sql);}@OverridepublicvoidonUpgrade(SQLiteDatabasedb,intoldVersion,intnewVersion){Stringsql="DROPTABLEIFEXISTS"+TABLE_NAME;
db.execSQL(sql);onCreate(db);}publicCursorselect(){SQLiteDatabasedb=this.getReadableDatabase();Cursorcursor=db.query(TABLE_NAME,null,null,null,null,null,null);returncursor;}//增加操作publiclonginsert(Stringbookname,Stringauthor)
{SQLiteDatabasedb=this.getWritableDatabase();/*ContentValues*/ContentValuescv=newContentValues();cv.put(BOOK_NAME,bookname);cv.put(BOOK_AUTHOR,author);longrow=db.insert(TABLE_NAME,null,cv);returnrow;}//删除操作publicvoiddelete(intid){SQLiteDatabasedb=this.getWritableDatabase();Stringwhere=BOOK_ID+"=?";String[]whereValue={Integer.toString(id)};db.delete(TABLE_NAME,where,whereValue);}//修改操作publicvoidupdate(intid,Stringbookname,Stringauthor){SQLiteDatabasedb=this.getWritableDatabase();Stringwhere=BOOK_ID+"=?";String[]whereValue={Integer.toString(id)};ContentValuescv=newContentValues();cv.put(BOOK_NAME,bookname);cv.put(BOOK_AUTHOR,author);db.update(TABLE_NAME,cv,where,whereValue);}}packagecom.android.tutor;importandroid.content.ContentValues;importandroid.content.Context;importandroid.database.Cursor;importandroid.database.sqlite.SQLiteDatabase;importandroid.database.sqlite.SQLiteOpenHelper;publicclassBooksDBextendsSQLiteOpenHelper{privatefinalstaticStringDATABASE_NAME="BOOKS.db";privatefinalstaticintDATABASE_VERSION=1;privatefinalstaticStringTABLE_NAME="books_table";publicfinalstaticStringBOOK_ID="book_id";publicfinalstaticStringBOOK_NAME="book_name";publicfinalstaticStringBOOK_AUTHOR="book_author";
publicBooksDB(Contextcontext){//TODOAuto-generatedconstructorstubsuper(context,DATABASE_NAME,null,DATABASE_VERSION);}//创建table@OverridepublicvoidonCreate(SQLiteDatabasedb){Stringsql="CREATETABLE"+TABLE_NAME+"("+BOOK_ID+"INTEGERprimarykeyautoincrement,"+BOOK_NAME+"text,"+BOOK_AUTHOR+"text);";db.execSQL(sql);}@OverridepublicvoidonUpgrade(SQLiteDatabasedb,intoldVersion,intnewVersion){Stringsql="DROPTABLEIFEXISTS"+TABLE_NAME;db.execSQL(sql);onCreate(db);}publicCursorselect(){SQLiteDatabasedb=this.getReadableDatabase();Cursorcursor=db.query(TABLE_NAME,null,null,null,null,null,null);returncursor;}//增加操作publiclonginsert(Stringbookname,Stringauthor){SQLiteDatabasedb=this.getWritableDatabase();/*ContentValues*/ContentValuescv=newContentValues();cv.put(BOOK_NAME,bookname);cv.put(BOOK_AUTHOR,author);longrow=db.insert(TABLE_NAME,null,cv);returnrow;}//删除操作publicvoiddelete(intid){SQLiteDatabasedb=this.getWritableDatabase();Stringwhere=BOOK_ID+"=?";String[]whereValue={Integer.toString(id)};db.delete(TABLE_NAME,where,whereValue);
}//修改操作publicvoidupdate(intid,Stringbookname,Stringauthor){SQLiteDatabasedb=this.getWritableDatabase();Stringwhere=BOOK
_ID+"=?";String[]whereValue={Integer.toString(id)};ContentValuescv=newContentValues();cv.put(BOOK_NAME,bookname);cv.put(BOOK_AUTHOR,author);db.update(TABLE_NAME,cv,where,whereValue);}}
第三步:修改main.xml布局如下，由两个EditText和一个ListView组成，代码如下:viewplaincopytoclipboardprint?
importandroid.widget.Toast;publicclassSQLiteDatabaseDemoextendsActivityimplementsAdapterView.OnItemClickListener{privateBooksDBmBooksDB;privateCursormCursor;privateEditTextBookName;privateEditTextBookAuthor;privateListViewBooksList;privateintBOOK_ID=0;protectedfinalstaticintMENU_ADD=Menu.FIRST;protectedfinalstaticintMENU_DELETE=Menu.FIRST+1;protectedfinalstaticintMENU_UPDATE=Menu.FIRST+2;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);setUpViews();}publicvoidsetUpViews(){mBooksDB=newBooksDB(this);mCursor=mBooksDB.select();BookName=(EditText)findViewById(R.id.bookname);BookAuthor=(EditText)findViewById(R.id.author);BooksList=(ListView)findViewById(R.id.bookslist);BooksList.setAdapter(newBooksListAdapter(this,mCursor));BooksList.setOnItemClickListener(this);}@Overridepublic
booleanonCreateOptionsMenu(Menumenu){super.onCreateOptionsMenu(menu);menu.add(Menu.NONE,MENU_ADD,0,"ADD");menu.add(Menu.NONE,MENU_DELETE,0,"DELETE");menu.add(Menu.NONE,MENU_DELETE,0,"UPDATE");returntrue;}publicbooleanonOptionsItemSelected(MenuItemitem){
super.onOptionsItemSelected(item);switch(item.getItemId()){caseMENU_ADD:add();break;caseMENU_DELETE:delete();break;caseMENU_UPDATE:update();break;}returntrue;}publicvoidadd(){Stringbookname=BookName.getText().toString();Stringauthor=BookAuthor.getText().toString();//书名和作者都不能为空，或者退出if(bookname.equals("")||author.equals("")){return;}mBooksDB.insert(bookname,author);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"AddSuccessed!",Toast.LENGTH_SHORT).show();}publicvoiddelete(){if(BOOK_ID==0){return;}mBooksDB.delete(BOOK_ID);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"DeleteSuccessed!",Toast.LENGTH_SHORT).show();}
publicvoidupdate(){Stringbookname=BookName.getText().toString();Stringauthor=BookAuthor.getText().toString();//书名和作者都不能为空，或者退出if(bookname.equals("")||author.equals("")){return;}mBooksDB.update(BOOK_ID,bookname,author);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"UpdateSuccessed!",Toast.LENGTH_SHORT).show();}@OverridepublicvoidonItemClick(AdapterViewparent,Viewview,intposition,longid){mCursor.moveToPosition(position);BOOK_ID=mCursor.getInt(0);BookName.setText(mCursor.getString(1));BookAuthor.setText(mCursor.getString(2));}publicclassBooksListAdapterextendsBaseAdapter{privateContextmContext;privateCursormCursor;publicBooksListAdapter(Contextcontext,Cursorcursor){mContext=context;mCursor=cursor;}@OverridepublicintgetCount(){returnmCursor.getCount();}@OverridepublicObjectgetItem(intposition){returnnull;}
@OverridepubliclonggetItemId(intposition){return0;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){TextViewmTextView=newTextView(mContext);mCursor.moveToPosition(position);mTextView.setText(mCursor.getString(1)+"___"+mCursor.getString(2));returnmTextView;}}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Context;importandroid.database.Cursor;importandroid.os.Bundle;importandroid.view.Menu;importandroid.view.MenuItem;importandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.AdapterView;importandroid.widget.BaseAdapter;importandroid.widget.EditText;importandroid.widget.ListView;importandroid.widget.TextView;importandroid.widget.Toast;publicclassSQLiteDatabaseDemoextendsActivityimplementsAdapterView.OnItemClickListener{privateB
ooksDBmBooksDB;privateCursormCursor;privateEditTextBookName;privateEditTextBookAuthor;privateListViewBooksList;privateintBOOK_ID=0;protectedfinalstaticintMENU_ADD=Menu.FIRST;protectedfinalstaticintMENU_DELETE=Menu.FIRST+1;protectedfinalstaticintMENU_UPDATE=Menu.FIRST+2;
publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);setUpViews();}publicvoidsetUpViews(){mBooksDB=newBooksDB(this);mCursor=mBooksDB.select();BookName=(EditText)findViewById(R.id.bookname);BookAuthor=(EditText)findViewById(R.id.author);BooksList=(ListView)findViewById(R.id.bookslist);BooksList.setAdapter(newBooksListAdapter(this,mCursor));BooksList.setOnItemClickListener(this);}@OverridepublicbooleanonCreateOptionsMenu(Menumenu){super.onCreateOptionsMenu(menu);menu.add(Menu.NONE,MENU_ADD,0,"ADD");menu.add(Menu.NONE,MENU_DELETE,0,"DELETE");menu.add(Menu.NONE,MENU_DELETE,0,"UPDATE");returntrue;}publicbooleanonOptionsItemSelected(MenuItemitem){super.onOptionsItemSelected(item);switch(item.getItemId()){caseMENU_ADD:add();break;caseMENU_DELETE:delete();break;caseMENU_UPDATE:update();break;}returntrue;
}publicvoidadd(){Stringbookname=BookName.getText().toString();Stringauthor=BookAuthor.getText().toString();//书名和作者都不能为空，或者退出if(bookname.equals("")||author.equals("")){return;}mBooksDB.insert(bookname,author);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"AddSuccessed!",Toast.LENGTH_SHORT).show();}publicvoiddelete(){if(BOOK_ID==0){return;}mBooksDB.delete(BOOK_ID);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"DeleteSuccessed!",Toast.LENGTH_SHORT).show();}publicvoidupdate(){Stringbookname=BookName.getText().toString();Stringauthor=BookAuthor.getText().toString();//书名和作者都不能为空，或者退出if(bookname.equals("")||author.equals("")){return;}mBooksDB.update(BOOK_ID,bookname,author);mCursor.requery();BooksList.invalidateViews();BookName.setText("");BookAuthor.setText("");Toast.makeText(this,"UpdateSuccessed!",Toast.LENGTH_SHORT).show();}
@OverridepublicvoidonItemClick(AdapterViewparent,Viewview,intposition,longid){mCursor.moveToPosition(position);BOOK_ID=mCursor.getInt(0);BookName.setText(mCursor.getString(1));BookAuthor.setText(mCursor.getString(2));}publicclassBooksListAdapterextendsBaseAdapter{privateContextmContext;privateCursormCursor;publicBooksListAdapter(Contextcontext,Cursorcursor){mContext=context;mCursor=cursor;}@OverridepublicintgetCount(){returnmCursor.getCount();}@OverridepublicObjectgetItem(intposition){returnnull;}@OverridepubliclonggetItemId(intposition){return0;}@Overridepu
blicViewgetView(intposition,ViewconvertView,ViewGroupparent){TextViewmTextView=newTextView(mContext);mCursor.moveToPosition(position);mTextView.setText(mCursor.getString(1)+"___"+mCursor.getString(2));returnmTextView;}}}
第五步:运行程序效果如下:
第六步：查看我们所建的数据库。有两种方法：第一种用命令查看：adbshelllsdata/data/com.android.tutor/databases。另一种方法是用DDMS查看，data/data下面对应的应用程序的包名下会有如在下数据库，如图所示：
Android高手进阶教程十四)之----AndroidLocation的使用高手进阶教程(十四之十四大家好，今天说说Location,Location在Android开发中还是经常用到的，比如通过经纬度获取天气，根据Location获取所在地区详细Address（比如GoogleMap开发).等。而在Android中通过LocationManager来获取Location.通常获取Location有GPS获取，WIFI获取。我今天做一个简单的小Demo,来教大家如何获取Location,从而获取经纬度。下一节将教大家通过Location来获取Address.首先第一步:创建一个Android工程命名为LocationDemo.第二步：修改main.xml代码如下:viewplaincopytoclipboardprint?
@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);longitude=(TextView)findViewById(R.id.longitude);latitude=(TextView)findViewById(R.id.latitude);LocationmLocation=getLocation(this);
longitude.setText("Longitude:"+mLocation.getLongitude());latitude.setText("Latitude:"+mLocation.getLatitude());}//GettheLocationbyGPSorWIFIpublicLocationgetLocation(Contextcontext){LocationManagerlocMan=(LocationManager)context.getSystemService(Context.LOCATION_SERVICE);Locationlocation=locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);if(location==null){location=locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);}returnlocation;}}packagecom.android.tutor;importandroid.app.Activity;importandroid.content.Context;importandroid.location.Location;importandroid.location.LocationManager;importandroid.os.Bundle;importandroid.widget.TextView;publicclassLocationDemoextendsActivity{privateTextViewlongitude;privateTextViewlatitude;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);longitude=(TextView)findViewById(R.id.longitude);
latitude=(TextView)findViewById(R.id.latitude);LocationmLocation=getLocation(this);longitude.setText("Longitude:"+mLocation.getLongitude());latitude.setText("Latitude:"+mLocation.getLatitude());}//GettheLocationbyGPSorWIFIpublicLocationgetLocation(Contextcontext){LocationManagerlocMan=(LocationManager)context.getSystemService(Context.LOCATION_SERVICE);Locationlocation=locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);if(location==null){location=locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);}returnlocation;}}第四步：增加权限，修改AndroidManifest.xml代码如下（第16行为所增行）：viewplaincopytoclipboardprint?
第五步:运行LocationDemo工程，所得效果如下(真机深圳测试):
高手进阶教程(十五)---通过Android高手进阶教程(十五)之---通过Location获取Address的使用大家好，上一节我讲了一下如何通过LocationManager来获取Location，没有
看过上一节的同学，可以点击如下链接返回查看：Android高手进阶教程十四之---AndroidLocation的使用!我们获取Location的目的之一肯定是有获取这个位置的详细地址，而我们有了Location在来获取Address就相对简单多了，因为GoogleApi已经封装好了方法，我们只需呀通过Location获取GeoPoint,然后在通过GeoPoint来获取我们想要的Address.下面是我做的一个简单的Demo.第一步新建一个Android工程LocationDemo，注意这里选用的是(GoogleAPIs)，下面是文件目录结构：
第二步：修改main.xml(相比第十四节增加了一个address的TextView)，代码如下:viewplaincopytoclipboardprint?
importimportimportimportpublic
android.location.Location;android.location.LocationManager;android.os.Bundle;android.widget.TextView;classLocationDemoextendsActivity{
privateTextViewlongitude;privateTextViewlatitude;privateTextViewaddress;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.l
ayout.main);longitude=(TextView)findViewById(R.id.longitude);latitude=(TextView)findViewById(R.id.latitude);address=(TextView)findViewById(R.id.address);LocationmLocation=getLocation(this);GeoPointgp=getGeoByLocation(mLocation);AddressmAddress=getAddressbyGeoPoint(this,gp);
longitude.setText("Longitude:"+mLocation.getLongitude());latitude.setText("Latitude:"+mLocation.getLatitude());address.setText("Address:"+mAddress.getCountryName()+","+mAddress.getLocality());}//GettheLocationbyGPSorWIFIpublicLocationgetLocation(Contextcontext){LocationManagerlocMan=(LocationManager)context.getSystemService(Context.LOCATION_SERVICE);Locationlocation=locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);if(location==null){location=locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);}returnlocation;
}//通过Location获取GeoPointpublicGeoPointgetGeoByLocation(Locationlocation){GeoPointgp=null;try{if(location!=null){doublegeoLatitude=location.getLatitude()*1E6;doublegeoLongitude=location.getLongitude()*1E6;gp=newGeoPoint((int)geoLatitude,(int)geoLongitude);}}catch(Exceptione){e.printStackTrace();}returngp;}//通过GeoPoint来获取AddresspublicAddressgetAddressbyGeoPoint(Contextcntext,GeoPointgp){Addressresult=null;try{if(gp!=null){Geocodergc=newGeocoder(cntext,Locale.CHINA);doublegeoLatitude=(int)gp.getLatitudeE6()/1E6;doublegeoLongitude=(int)gp.getLongitudeE6()/1E6;List gc.getFromLocation(geoLatitude,geoLongitude,1);if(lstAddress.size()>0){result=lstAddress.get(0);}}}catch(Exceptione){e.printStackTrace();}returnresult;}}packagecom.android.tutor;importjava.util.List;lstAddress=
importimportimportimportimportimportimportimportimportimportpublic
java.util.Locale;com.google.android.maps.GeoPoint;android.app.Activity;android.content.Context;android.location.Address;android.location.Geocoder;android.location.Location;android.location.LocationManager;android.os.Bundle;android.widget.TextView;classLocationDemoextendsActivity{
privateTextViewlongitude;privateTextViewlatitude;privateTextViewaddress;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);longitude=(TextView)findViewById(R.id.longitude);latitude=(TextView)findViewById(R.id.latitude);address=(TextView)findViewById(R.id.address);LocationmLocation=getLocation(this);GeoPointgp=getGeoByLocation(mLocation);AddressmAddress=getAddressbyGeoPoint(this,gp);
longitude.setText("Longitude:"+mLocation.getLongitude());latitude.setText("Latitude:"+mLocation.getLatitude());address.setText("Address:"+mAddress.getCountryName()+","+mAddress.getLocality());}//GettheLocationbyGPSorWIFIpublicLocationgetLocation(Contextcontext){LocationManagerlocMan=(Locati
onManager)context.getSystemService(Context.LOCATION_SERVICE);Locationlocation=locMan.getLastKnownLocation(LocationManager.GPS_PROVIDER);if(location==null){location=locMan
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);}returnlocation;}//通过Location获取GeoPointpublicGeoPointgetGeoByLocation(Locationlocation){GeoPointgp=null;try{if(location!=null){doublegeoLatitude=location.getLatitude()*1E6;doublegeoLongitude=location.getLongitude()*1E6;gp=newGeoPoint((int)geoLatitude,(int)geoLongitude);}}catch(Exceptione){e.printStackTrace();}returngp;}//通过GeoPoint来获取AddresspublicAddressgetAddressbyGeoPoint(Contextcntext,GeoPointgp){Addressresult=null;try{if(gp!=null){Geocodergc=newGeocoder(cntext,Locale.CHINA);doublegeoLatitude=(int)gp.getLatitudeE6()/1E6;doublegeoLongitude=(int)gp.getLongitudeE6()/1E6;List lstAddress=
gc.getFromLocation(geoLatitude,geoLongitude,1);if(lstAddress.size()>0){result=lstAddress.get(0);}}}catch(Exceptione){e.printStackTrace();}returnresult;}}第四步:最重要一步在AndroidManiefest.xml中导入GoogleApi(第14行代码)库,代码如下:viewplaincopytoclipboardprint?
高手进阶教程(十六)---AndroidAndroid高手进阶教程(十六)之---Android中万能的BaseAdapter(Spinner,ListView,GridView)的使用的使用！BaseAdapter(Spinner,ListView,GridView)的使用！大家好!今天给大家讲解一下BaseAdapter(基础适配器
）的用法，适配器的作用主要是用来给诸如(Spinner,ListView,GridView)来填充数据的。而(Spinner,ListView,GridView)都有自己的适配器(记起来麻烦)。但是BaseAdapter（一招鲜）对他们来说却是通用的，为什么这么说呢，首先我们看
一下API文档:
我们看一下BaseAdapter已经实现了ListAdapter和SpinnerAdapter的接口，而GridView的适配器是实现了ListAdapter接口，只不过是二维的。所以说BaseAdapter对他们三者来说是通用的。下面我来说一下BaseAdapter的主要用法.就是我们定义一个类(如：MyAdapter)而这个类继承BaseAdapter.因为它是implements了ListAdapter和SpinnerAdapter的接口，所以要实现里面的方法，代码如下(未作任何改动的）：viewplaincopytoclipboardprint?privateclassMyAdapterextendsBaseAdapter{@OverridepublicintgetCount(){//TODOAuto-generatedmethodstubreturn0;}@OverridepublicObjectgetItem(intarg0){//TODOAuto-generatedmethodstubreturnnull;}@OverridepubliclonggetItemId(intposition){//TODOAuto-generatedmethodstubreturn0;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){//TODOAuto-generatedmethodstubreturnnull;
}}privateclassMyAdapterextendsBaseAdapter{@OverridepublicintgetCount(){//TODOAuto-generatedmethodstubreturn0;}@OverridepublicObjectgetItem(intarg0){//TODOAuto-generatedmethodstubreturnnull;}@OverridepubliclonggetItemId(intposition){//TODOAuto-generatedmethodstubreturn0;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){//TODOAuto-generatedmethodstubreturnnull;}}为了便于大家理解，老规矩写一个简单的Demo,大家按我的步骤来就OK了.第一步:新建一个Android工程命名为BaseAdapterDemo.第二步:修改main.xml代码如下:viewplaincopytoclipboardprint?
viewplaincopytoclipboardprint?packagecom.tutor.baseadapter;importandroid.app.Activity;importandroid.graphics.Color;importandroid.os.Bundle;importandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.BaseAdapter;importandroid.widget.GridView;importandroid.widget.ListView;importandroid.widget.Spinner;importandroid.widget.TextView;publicclassBaseAdapterDemoextendsActivity{privateSpinnermSpinner;privateListViewmListView;privateGridViewmGridView;privateMyAdaptermMyAdapter;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);setupViews();}publicvoidsetupViews(){mMyAdapter=newMyAdapter();mSpinner=(Spinner)findViewById(R.id.spinner);mSpinner.setAdapter(mMyAdapter);mListView=(ListView)findViewById(R.id.listview);mListView.setAdapter(mMyAdapter);mGridView=(GridView)findViewById(R.id.gridview);mGridView.setAdapter(mMyAdapter);mGridView.setNumColumns(2);}//定义自己的适配器,注意getCount和getView方法privateclassMyAdapterextendsBaseAdapter{@OverridepublicintgetCount(){//这里我就返回10了，也就是一共有10项数据项return10;}
@OverridepublicObjectgetItem(intarg0){returnarg0;}@OverridepubliclonggetItemId(intposition){returnposition;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){//position就是位置从0开始，convertView是Spinner,ListView中每一项要显示的view//通常return的view也就是convertView//parent就是父窗体了，也就是Spinner,ListView,GridView了.TextViewmTextView=newTextView(getApplicationContext());mTextView.setText("BaseAdapterDemo");mTextView.setTextColor(Color.RED);returnmTextView;}}}packagecom.tutor.baseadapter;importandroid.app.Activity;importandroid.graphics.Color;importandroid.os.Bundle;importandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.BaseAdapter;importandroid.widget.GridView;importandroid.widget.ListView;importandroid.widget.Spinner;importandroid.widget.TextView;publicclassBaseAdapterDemoextendsActivity{privateSpinnermSpinner;privateListViewmListView;privateGridViewmGridView;privateMyAdaptermMyAdapter;@OverridepublicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);setContentView(R.layout.main);setupViews();}publicvoidsetupViews(){mMyAdapter=newMyAdapter();mSpinner=(Spinner)findViewById(R.id.spinner);mSpinner.setAdapt
er(mMyAdapter);mListView=(ListView)findViewById(R.id.listview);mListView.setAdapter(mMyAdapter);mGridView=(GridView)findViewById(R.id.gridview);mGridView.setAdapter(mMyAdapter);mGridView.setNumColumns(2);}//定义自己的适配器,注意getCount和getView方法privateclassMyAdapterextendsBaseAdapter{@OverridepublicintgetCount(){//这里我就返回10了，也就是一共有10项数据项return10;}@OverridepublicObjectgetItem(intarg0){returnarg0;}@OverridepubliclonggetItemId(intposition){returnposition;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){//position就是位置从0开始，convertView是Spinner,ListView中每一项要显示的view//通常return的view也就是convertView//parent就是父窗体了，也就是Spinner,ListView,GridView了.TextViewmTextView=newTextView(getApplicationContext());mTextView.setText("BaseAdapterDemo");mTextView.setTextColor(Color.RED);returnmTextView;}
}}第四步:运行程序效果图如下:效果图一:
效果图二：
等等，平时我在这里就和大家告别了，今天还没完呵呵，因为下面是我们的重点了，我们平常看的应用列表什么的，不是单单的一个TextView就可以了事的，所以我们可以在Layout里事先定义好布局。这里我新建了一个名叫baseadapter_provider.xml文件，代码如下:viewplaincopytoclipboardprint?
//////
mTextView.setText("B
aseAdapterDemo");mTextView.setTextColor(Color.RED);returnmTextView;//LayoutInflater不会的参照我的Android高手进阶教程
(五)convertViewLayoutInflater.from(getApplicationContext()).inflate(R.layout.baseadapter_provider,null);=
TextViewmTextView=(TextView)convertView.findViewById(R.id.textview);mTextView.setText("BaseAdapterDemo"+position);mTextView.setTextColor(Color.RED);returnconvertView;}@OverridepublicViewgetView(intposition,ViewconvertView,ViewGroupparent){//position就是位置从0开始，convertView是Spinner,ListView中每一项要显示的view//通常return的view也就是convertView//parent就是父窗体了，也就是Spinner,ListView,GridView了.//TextViewmTextView=newTextView(getApplicationContext());//mTextView.setText("BaseAdapterDemo");//mTextView.setTextColor(Color.RED);//returnmTextView;//LayoutInflater不会的参照我的Android高手进阶教程(五)convertView=LayoutInflater.from(getApplicationContext()).inflate(R.layout.baseadapter_provider,null);TextViewmTextView(TextView)convertView.findViewById(R.id.textview);mTextView.setText("BaseAdapterDemo"+position);mTextView.setTextColor(Color.RED);returnconvertView;}再次运行看一下效果图如下:=
Android高手进阶教程十七之---Android中Intent传递对高手进阶教程(十七十七)之象的两种方法(Serializable,Parcelable)象的两种方法
大家好，好久不见，今天要给大家讲一下Android中Intent中如何传递对象,就我目前所知道的有两种方法，一种是Bundle.putSerializable(Key,Object);另一种是Bundle.putParcelable(Key,Object);当然这些Object是有一定的条件的，前者是实现了Serializable接口，而后者是实现了Parcelable接口，为了让大家更容易理解我还是照常写了一个简单的Demo,大家就一步一步跟我来吧！第一步:新建一个Android工程命名为ObjectTranDemo(类比较多哦!)目录结构如下图:
第二步:修改main.xml布局文件(这里我增加了两个按钮)代码如下viewplaincopytoclipboardprint?
publicStringgetName(){returnname;}publicvoidsetName(Stringname){this.name=name;}publicintgetAge(){returnage;}publicvoidsetAge(intage){this.age=age;}}packagecom.tutor.objecttran;importjava.io.Serializable;publicclassPersonimplementsSerializable{privatestaticfinallongserialVersionUID=-7060210544600464481L;privateStringname;privateintage;publicStringgetName(){returnname;}publicvoidsetName(Stringname){this.name=name;}publicintgetAge(){returnage;}publicvoidsetAge(intage){this.age=age;}}Book.java:viewplaincopytoclipboardprint?packagecom.tutor.objecttran;importandroid.os.Parcel;importandroid.os.Parcelable;publicclassBookimplementsParcelable{privateStringbookName;privateStringauthor;privateintpublishTime;
publicStringgetBookName(){returnbookName;}publicvoidsetBookName(StringbookName){this.bookName=bookName;}publicStringgetAuthor(){returnauthor;}publicvoidsetAuthor(Stringauthor){this.author=author;}publicintgetPublishTime(){returnpublishTime;}publicvoidsetPublishTime(intpublishTime){this.publishTime=publishTime;}publicstaticfinalParcelable.Creator
importandroid.os.Parcel;importandroid.os.Parcelable;publicclassBookimplementsParcelable{privateStringbookName;privateStringauthor;privateintpublishTime;publicStringgetBookName(){returnbookName;}publicvoidsetBookName(StringbookName){this.bookName=bookName;}publicStringgetAuthor(){returnauthor;}publicvoidsetAuthor(Stringauthor){this.author=author;}publicintgetPublishTime()
{returnpublishTime;}publicvoidsetPublishTime(intpublishTime){this.publishTime=publishTime;}publicstaticfinalParcelable.Creator
parcel.writeString(bookName);parcel.writeString(author);parcel.writeInt(publishTime);}}第四步:修改ObjectTranDemo.java,并且新建两个Activity,一个是ObjectTranDemo1.java,别一个是ObjectTranDemo2.java.分别用来显示Person对像数据，和Book对象数据:,代码分别如下：ObjectTranDemo.java:viewplaincopytoclipboardprint?packagecom.tutor.objecttran;importandroid.app.Activity;importandroid.content.Intent;importandroid.os.Bundle;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;publicclassObjectTranDemoextendsActivityimplementsOnClickListener{privateButtonsButton,pButton;publicfinalstaticStringSER_KEY="com.tutor.objecttran.ser";publicfinalstaticStringPAR_KEY="com.tutor.objecttran.par";publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);setupViews();}//我的一贯作风呵呵publicvoidsetupViews(){sButton=(Button)findViewById(R.id.button1);pButton=(Button)findViewById(R.id.button2);sButton.setOnClickListener(this);pButton.setOnClickListener(this);}//Serializeable传递对象的方法publicvoidSerializeMethod(){PersonmPerson=newPerson();mPerson.setName("frankie");
mPerson.setAge(25);IntentmIntent=newIntent(this,ObjectTranDemo1.class);BundlemBundle=newBundle();mBundle.putSerializable(SER_KEY,mPerson);mIntent.putExtras(mBundle);startActivity(mIntent);}//Pacelable传递对象方法publicvoidPacelableMethod(){BookmBook=newBook();mBook.setBookName("AndroidTutor");mBook.setAuthor("Frankie");mBook.setPublishTime(2010);IntentmIntent=newIntent(this,ObjectTranDemo2.class);BundlemBundle=newBundle();mBundle.putParcelable(PAR_KEY,mBook);mIntent.putExtras(mBundle);startActivity(mIntent);}//铵钮点击事件响应publicvoidonClick(Viewv){if(v==sButton){SerializeMethod();}else{PacelableMethod();}}}packagecom.tutor.objecttran;importandroid.app.Activity;importandroid.content.Intent;importandroid.os.Bundle;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;publicclassObjectTranDemoextendsActivityimplementsOnClickListener{privateButtonsButton,pButton;publicfinalstaticStringSER_KEY="com.tutor.objecttran.ser";publicfinalstaticStringPAR_KEY="com.tutor.objecttran.par";publicvoidonCreate(Bund
lesavedInstanceState){
super.onCreate(savedInstanceState);setContentView(R.layout.main);setupViews();}//我的一贯作风呵呵publicvoidsetupViews(){sButton=(Button)findViewById(R.id.button1);pButton=(Button)findViewById(R.id.button2);sButton.setOnClickListener(this);pButton.setOnClickListener(this);}//Serializeable传递对象的方法publicvoidSerializeMethod(){PersonmPerson=newPerson();mPerson.setName("frankie");mPerson.setAge(25);IntentmIntent=newIntent(this,ObjectTranDemo1.class);BundlemBundle=newBundle();mBundle.putSerializable(SER_KEY,mPerson);mIntent.putExtras(mBundle);startActivity(mIntent);}//Pacelable传递对象方法publicvoidPacelableMethod(){BookmBook=newBook();mBook.setBookName("AndroidTutor");mBook.setAuthor("Frankie");mBook.setPublishTime(2010);IntentmIntent=newIntent(this,ObjectTranDemo2.class);BundlemBundle=newBundle();mBundle.putParcelable(PAR_KEY,mBook);mIntent.putExtras(mBundle);startActivity(mIntent);}//铵钮点击事件响应publicvoidonClick(Viewv){if(v==sButton){SerializeMethod();}else{PacelableMethod();
}}}ObjectTranDemo1.java:viewplaincopytoclipboardprint?packagecom.tutor.objecttran;importandroid.app.Activity;importandroid.os.Bundle;importandroid.widget.TextView;publicclassObjectTranDemo1extendsActivity{@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);TextViewmTextView=newTextView(this);PersonmPerson=(Person)getIntent().getSerializableExtra(ObjectTranDemo.SER_KEY);mTextView.setText("Younameis:"+mPerson.getName()+"\n"+"Youageis:"+mPerson.getAge());setContentView(mTextView);}}packagecom.tutor.objecttran;importandroid.app.Activity;importandroid.os.Bundle;importandroid.widget.TextView;publicclassObjectTranDemo1extendsActivity{@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);TextViewmTextView=newTextView(this);PersonmPerson=(Person)getIntent().getSerializableExtra(ObjectTranDemo.SER_KEY);mTextView.setText("Younameis:"+mPerson.getName()+"\n"+"Youageis:"+mPerson.getAge());setContentView(mTextView);}}ObjectTranDemo2.java:viewplaincopytoclipboardprint?packagecom.tutor.objecttran;
importimportimportpublic
android.app.Activity;android.os.Bundle;android.widget.TextView;classObjectTranDemo2extendsActivity{
publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);TextViewmTextView=newTextView(this);BookmBook=(Book)getIntent().getParcelableExtra(ObjectTranDemo.PAR_KEY);mTextView.setText("Booknameis:"+mBook.getBookName()+"\n"+"Authoris:"+mBook.getAuthor()+"\n"+"PublishTimeis:"+mBook.getPublishTime());setContentView(mTextView);}}packagecom.tutor.objecttran;importandroid.app.Activity;importandroid.os.Bundle;importandroid.widget.TextView;publicclassObjectTranDemo2extendsActivit
y{publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);TextViewmTextView=newTextView(this);BookmBook=(Book)getIntent().getParcelableExtra(ObjectTranDemo.PAR_KEY);mTextView.setText("Booknameis:"+mBook.getBookName()+"\n"+"Authoris:"+mBook.getAuthor()+"\n"+"PublishTimeis:"+mBook.getPublishTime());setContentView(mTextView);}}第五步:比较重要的一步啦，修改AndroidManifest.xml文件（将两个新增的Activity，ObjectTranDemo1,ObjectTranDemo2)申明一下代码如下(第14，15行):viewplaincopytoclipboardprint?
效果1：首界面:
效果2:点击Serializable按钮
效果3:点击Parcelable按钮: