获得控件坐标

三种方法：

1. getLocationOnScreen(location)：获得在屏幕上的坐标（包括通知栏）

2. getLocationInWindow(location)：获得在该窗口的坐标

3. getTop()、getLeft()、getBottom()、getRight()获得在父窗口中的位置

   注意：在获得控件的宽高时，不能放在onCreate()中,在该方法中，是无法获得控件的宽高和坐标的，应在生命周期中的 onWindowFocusChanged(boolean hasFocus)方法中实现

1. 以下代码仅供测试：

   
   

   import android.app.Activity;
   import android.graphics.Color;
   import android.os.Bundle;
   import android.view.View;
   import android.widget.ImageView;
   import android.widget.RelativeLayout;
   import android.widget.RelativeLayout.LayoutParams;
   import android.widget.TextView;

   public class TestActivity extends Activity {

    private ImageView img;
    private RelativeLayout container;
    private TextView show;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.imageview);
     img = (ImageView) findViewById(R.id.img);
     container = (RelativeLayout) findViewById(R.id.container);
     show = (TextView) findViewById(R.id.show);
     
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
     super.onWindowFocusChanged(hasFocus);
     int[] location = new int[2];
     img.getLocationInWindow(location);
     
     View hView = new View(this);
     hView.setBackgroundColor(Color.WHITE);
     LayoutParams lp= new LayoutParams(5, location[1]+img.getHeight());
     lp.leftMargin = location[1]+img.getWidth()+20;
     lp.topMargin = img.getTop();
     hView.setLayoutParams(lp);
     
     container.addView(hView);
     show.setText("x:"+location[0]+"\ny:"+img.getTop());
    } 

   }

imageview.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:src="@drawable/home1" />

    <TextView
        android:id="@+id/show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/img" />

</RelativeLayout>