android view的触摸事件坐标不是屏幕坐标,是相对于view左上角的坐标。
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = (TextView) findViewById(R.id.tv);
tv.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
System.out.println("坐标:[x,y] = [" + event.getX() + "," + event.getY() + "]");
return false;
}
});
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/tv"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#ff00ffff"
android:gravity="center"
android:text="click me"
tools:context=".MainActivity" />
</RelativeLayout>
04-10 23:27:10.889: I/System.out(10515): 坐标:[x,y] = [0.0,21.0]
04-10 23:27:11.159: I/System.out(10515): 坐标:[x,y] = [3.0,21.0]
04-10 23:27:11.369: I/System.out(10515): 坐标:[x,y] = [3.0,21.0]
04-10 23:27:11.549: I/System.out(10515): 坐标:[x,y] = [9.0,18.0]
04-10 23:27:11.699: I/System.out(10515): 坐标:[x,y] = [10.0,20.0]
04-10 23:27:11.869: I/System.out(10515): 坐标:[x,y] = [13.0,20.0]

本文介绍了Android中View的触摸事件处理机制,并通过一个具体的TextView示例展示了触摸事件坐标系的特点,即这些坐标是相对于View自身左上角而非屏幕坐标。
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