Android ProgressBar学习笔记(An-Beer工作室)

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    AndroidProgressBar学习笔记
    ProgressBar是Android的进度条。体验效果
    源码下载下面详细介绍ProgressBar一、说明在某些操作的进度中的可视指示器，为用户呈现操作的进度，还它有一个次要的进度条，用来显示中间进度，如在流媒体播放的缓冲区的进度。一个进度条也可不确定其进度。在不确定模式下，进度条显示循环动画。这种模式常用于应用程序使用任务的长度是未知的。二、XML重要属性android:progressBarStyle：默认进度条样式android:progressBarStyleHorizontal：水平样式
    三、重要方法getMax()：返回这个进度条的范围的上限getProgress()：返回进度getSecondaryProgress()：返回次要进度incrementProgressBy(intdiff)：指定增加的进度isIndeterminate()：指示进度条是否在不确定模式下setIndeterminate(booleanindeterminate)：设置不确定模式下setVisibility(intv)：设置该进度条是否可视四、重要事件onSizeChanged(intw,inth,intoldw,intoldh)：当进度值改变时引发此事件五、实例1.布局文件
    
    
     2.Java代码
    packagewjq.WidgetDemo;importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.View;importandroid.view.Window;importandroid.widget.Button;importandroid.widget.ProgressBar;publicclassProgressBarDemoextendsActivity{/*(non-Javadoc)*@seeandroid.app.Activity#on
    Create(android.os.Bundle)*/@OverrideprotectedvoidonCreate(BundlesavedInstanceState){//TODOAuto-generatedmethodstubsuper.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_PROGRESS);setContentView(R.layout.probarpage);setProgressBarVisibility(true);finalProgressBarprogressHorizontal=(ProgressBar)findViewById(R.id.progress_horizontal);setProgress(progressHorizontal.getProgress()*100);setSecondaryProgress(progressHorizontal.getSecondaryProgress()*100);Buttonbutton=(Button)findViewById(R.id.increase);button.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){progressHorizontal.incrementProgressBy(1);//Titleprogressisinrange0..10000setProgress(100*progressHorizontal.getProgress());}});button=(Button)findViewById(R.id.decrease);button.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){progressHorizontal.incrementProgressBy(-1);//Titleprogressisinrange0..10000setProgress(100*progressHorizontal.getProgress());}});
     button=(Button)findViewById(R.id.increase_secondary);button.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){progressHorizontal.incrementSecondaryProgressBy(1);//Titleprogressisinrange0..10000setSecondaryProgress(100*progressHorizontal.getSecondaryProgress());}});button=(Button)findViewById(R.id.decrease_secondary);button.setOnClickListener(newButton.OnClickListener(){publicvoidonClick(Viewv){progressHorizontal.incrementSecondaryProgressBy(-1);//Titleprogressisinrange0..10000setSecondaryProgress(100*progressHorizontal.getSecondaryProgress());}});}}