Android~~获取view在屏幕中的位置
getLocalVisibleRect?， 返回一个填充的Rect对象， 感觉是这个View的Rect大小，left，top取到的都是0
···
getGlobalVisibleRect?， 获取全局坐标系的一个视图区域， 返回一个填充的Rect对象；该Rect是基于总整个屏幕的
···
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
···
**注**：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（个人感觉好像是得有焦点，不是很清楚，待查查）
example:
??? int[] location = new int[2];
??? v.getLocationOnScreen(location);
??? int x = location[0];
??? int y = location[1];
XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
??? android:orientation="vertical"
??? android:layout_width="fill_parent"
??? android:layout_height="fill_parent"
??? android:padding="5px"
??? >
??? <ViewFlipper
??????? android:id="@+id/fliper"???
??????? android:layout_width="fill_parent"???
??????? android:layout_height="100dp"???
??????? android:background="#FFFFFF"
??????? android:flipInterval="2000" >??
??????? <TextView???
??????? ??? android:id="@+id/tv_1"??
??????????? android:text="Hello1"
??????????? android:layout_width="wrap_content"???
??????????? android:layout_height="wrap_content"???
??????????? android:layout_gravity="center_horizontal">??
???????? </TextView>
??? ??? <TextView???
??? ??? ??? android:id="@+id/tv_2"??
??????????? android:text="Hello"
??????????? android:layout_width="wrap_content"???
??????????? android:layout_height="wrap_content"
??????????? android:layout_gravity="center_horizontal">??
??????? </TextView>??
???? </ViewFlipper>
???? <Button android:id="@+id/button2"
???? ??? ??? android:layout_width="fill_parent"
??????????? android:layout_height="wrap_content"
??????????? android:text="B"
??????????? android:layout_gravity="center_horizontal"
??????????? />
</LinearLayout>
JavaCode：
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ViewFlipper;
public class ViewLocationActivity extends Activity {
??? private ViewFlipper flipper;
??? private Rect mRectSrc = new Rect();
??? int[] location = new int[2];
??? int x, y;
??? /** Called when the activity is first created. */
??? @Override
??? public void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);
??????? setContentView(R.layout.main);
??????? flipper = (ViewFlipper) findViewById(R.id.fliper);
??????? Log.d("demo", "left:" + flipper.getLeft());
??????? Log.d("demo", "right:" + flipper.getRight());
??????? Log.d("demo", "Top:" + flipper.getTop());
??????? Log.d("demo", "Bottom:" + flipper.getBottom());
??????? Button btn = (Button) findViewById(R.id.button2);
??????? btn.setOnClickListener(new OnClickListener() {
??????????? public void onClick(View v) {
??????????????? Log.d("demo", "Button.Width--->" + v.getWidth());
??????????????? Log.d("demo", "Button.Height--->" + v.getHeight());
??????????????? v.getLocalVisibleRect(mRectSrc);
??????????????? Log.d("demo", "LocalVisibleRect--->" + mRectSrc);
??????????????? v.getGlobalVisibleRect(mRectSrc);
??????????????? Log.d("demo", "GlobalVisibleRect--->" + mRectSrc);
??????????????? v.getLocationOnScreen(location);
??????????????? x = location[0];
??????????????? y = location[1];
??????????????? Log.d("demo", "Screenx--->" + x + "? " + "Screeny--->" + y);
??????????????? v.getLocationInWindow(location);
??????????????? x = location[0];
??????????????? y = location[1];
??????????????? Log.d("demo", "Window--->" + x + "? " + "Window--->" + y);
??????????????? Log.d("demo", "left:" + v.getLeft());
??????????????? Log.d("demo", "right:" + v.getRight());
??????????????? Log.d("demo", "Top:" + v.getTop());
??????????????? Log.d("demo", "Bottom:" + v.getBottom());
??????????? }
??????? });
??? }
}
**显示**
Button.Width--->470
Button.Height--->72
LocalVisibleRect--->Rect(0, 0 - 470, 72)
GlobalVisibleRect--->Rect(5, 231 - 475, 303)
Screenx--->5? Screeny--->231
Windowx--->5? Windowy--->231
left:5
right:475
Top:155
Bottom:227
?
来自：http://www.cnblogs.com/520Dennan/archive/2011/07/19/2111143.html
