activity 成popupwindow效果

manifest.xml

 <activity
            android:name="cn.bw.activitys.ExitActivity"
            android:theme="@style/MyDialogStyle">
        </activity>

styles.xml

<style name="MyDialogStyle">
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
        <item name="android:backgroundDimEnabled">true</item>
    </style>

activity

package cn.bw.activitys;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.Toast;

public class ExitActivity extends Activity {
    private LinearLayout layout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.exit_dialog);
        //dialog=new MyDialog(this);
        layout=(LinearLayout)findViewById(R.id.exit_layout);
        layout.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "提示：点击窗口外部关闭窗口！", 
                        Toast.LENGTH_SHORT).show();    
            }
        });
    }

/*
**在按下屏幕的其他地方会消失，
*/
    @Override
    public boolean onTouchEvent(MotionEvent event){
        finish();
        return true;
    }
    
    public void exitbutton1(View v) {  
        this.finish();        
      }  
    public void exitbutton0(View v) {  
        this.finish();
        MainWeixinActivity.instance.finish();//关闭Main 这个Activity
      }  
    
}

布局：

<?xml version="1.0" encoding="UTF-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/exit_layout"
        android:layout_width="280dp"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:orientation="vertical"
        android:background="@drawable/confirm_dialog_bg2" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:padding="5dp"
            android:textColor="#333"
            android:textSize="20sp"
            android:text="退出微信" />
        
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#333"
            android:layout_marginTop="1dp"
            android:padding="10dp"
            android:textSize="16sp"
            android:gravity="center_horizontal"
            android:text="退出后，你将收不到新的消\n息.确定要退出？" /> 
        

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"           
            android:layout_marginTop="33dp"
            android:layout_marginBottom="8dp"
             >
            
            <Button
              android:id="@+id/exitBtn0"
              android:layout_width="110dp"
              android:layout_height="wrap_content"
              android:text="是"
              android:textSize="16sp"
              android:textColor="#fff"
              android:background="@drawable/btn_style_green"
              android:gravity="center"
              android:onClick="exitbutton0"
              />
            
            <Button
              android:id="@+id/exitBtn1"
              android:layout_width="110dp"
              android:layout_height="wrap_content"
              android:layout_marginLeft="10dp"
              android:text="否"
              android:textSize="16sp"
              android:textColor="#333"
              android:background="@drawable/btn_style_white"
              android:gravity="center"
              android:onClick="exitbutton1"
              />
        </LinearLayout>

    </LinearLayout>