Android得到控件在屏幕中的坐标

getLocationOnScreen ，计算该视图在全局坐标系中的x，y值，（注意这个值是要从屏幕顶端算起，也就是索包括了通知栏的高度）//获取在当前屏幕内的绝对坐标

getLocationInWindow ，计算该视图在它所在的widnow的坐标x，y值，//获取在整个窗口内的绝对坐标 (不是很理解= =、)

getLeft , getTop, getBottom,getRight,
这一组是获取相对在它父亲里的坐标

如果在Activity的OnCreate()事件输出那些参数，是全为0，要等UI控件都加载完了才能获取到这些。

[java]
view plaincopy

package xiaosi.location;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class LocationActivity extends Activity {
/** Called when the activity is first created. */
private ImageView t = null;
private Button button = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

t = (ImageView)findViewById(R.id.l);
button = (Button)findViewById(R.id.button);
button.setOnClickListener(new buttonListener());
}
public class buttonListener implements OnClickListener{

public void onClick(View v)
{
int[] location = new int[2];
t.getLocationOnScreen(location);
int x = location[0];
int y = location[1];
System.out.println("x:"+x+"y:"+y);
System.out.println("图片各个角Left："+t.getLeft()+"Right："+t.getRight()+"Top："+t.getTop()+"Bottom："+t.getBottom());
}
}
}



[java]
view plaincopy

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="button"/>
<ImageView
android:id="@+id/l"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="@drawable/a" />
</LinearLayout>