android学习UI事件

 Android SDK提供两种View处理机制:

 1、Event Listeners(事件侦听器） 2、Event Handlers(事件处理器）一般用于自定义组件重载对应的事件处理函数  View的UI事件侦听器 1、View.OnClickListener的onClick() 2、View.OnFocusChangeListener的onFocusChange() 3、View.OnKeyListener的onKey() 4、View.OnTouchListener的onTouch() 5、View.OnCreateContextMenuListener的onCreatContextMenu() ''关于上下文菜单弹出时的处理   View的UI事件侦听器实现--设置侦听 this.setFocusable(true); this.setFocusableInTouchMode(true); this.setOnClickListener(mClikListener); this.setOnLongClickListerer(mLongClickListener); this.setOnKeyListerer(mKeyListener); this.setOnTouchListerer(mTouchListener);   View的UI事件侦听器实现--处理事件 private OnClickListerer mClickListener = new OnClickListener(){      public void onClick(View v){           Log.d(TAG,"mClickListener");      } }; private OnLongClickListerer mLongClickListener = new OnLongClickListener(){      public boolean onLongClick(View v){           Log.d(TAG,"mLongClickListener");           return false;      } }; private OnKeyListener mKeyListener = new OnKeyListener (){      public boolean onKey(View v,int keyCode,KeyEvent event){            Log.d(TAG,"mKeyListener");            return false;      } }; private OnTouchListener mTouchListener = new OnTouchListener(){      public boolean OnTouch(View v ,MotionEvent event){            Log.d(TAG,"OnTouchListener");            return false;      } };   示例:按button触发OnClick事件显示"mKeyListener": button1 = (Button)findViewById(R.id.button1); button1.setOnClickListener(mKeyListener);