android view的触摸事件坐标

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]

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