<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@drawable/button_press" android:state_pressed="true"/> <item android:drawable="@drawable/button_nomal" android:state_focused="false" android:state_pressed="false"/> <item android:drawable="@drawable/button_focus" android:state_focused="true"/> <item android:drawable="@drawable/button_nomal" android:state_focused="false"/></selector>定义了两种状态:一种是按下 一种是获得焦点。
<Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="button效果演示"android:background="@drawable/selector" />在MainActivtiy中得到button
Button button1=(Button) this.findViewById(R.id.button1); button1.setOnClickListener(new View.OnClickListener() {@Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(getApplicationContext(), "你点击了button按钮", Toast.LENGTH_SHORT).show(); } }); 下面看下点击效果: 
当按下button按钮时:
接下来 看下第二种实现方式,在代码中实现:
首先在main.xml中添加:
<Buttonandroid:id="@+id/button2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="button效果演示"android:background="@drawable/button_nomal"/>接下面在MainActivity中实现:
Button button2=(Button) this.findViewById(R.id.button2); button2.setOnTouchListener(new OnTouchListener() {@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub if(event.getAction()==MotionEvent.ACTION_DOWN){ v.setBackgroundResource(R.drawable.button_press); }else if(event.getAction()==MotionEvent.ACTION_UP){ v.setBackgroundResource(R.drawable.button_nomal); } return false; } }); 在这类绑定了button的OnTouchListener监听,因为OnClickListener继承了OnTouchListener。运行效果和上面一样,这里不做过多解释。