【转】 android 悬浮窗口的拖动

 1 package net.xsmile.fv;
 2 
 3 
 4 import android.app.Application;
 5 import android.view.WindowManager;
 6 
 7 
 8 public class MyApplication extends Application {
 9     
10     /**
11      * 创建全局变量
12      * 全局变量一般都比较倾向于创建一个单独的数据类文件,并使用static静态变量
13      * 
14      * 这里使用了在Application中添加数据的方法实现全局变量
15      * 注意在AndroidManifest.xml中的Application节点添加android:name=".MyApplication"属性
16      * 
17      */
18     private WindowManager.LayoutParams wmParams=new WindowManager.LayoutParams();
19 
20 
21     public WindowManager.LayoutParams getMywmParams(){
22         return wmParams;
23     }
24 }
 1 package net.xsmile.fv;
 2 
 3 import android.content.Context;
 4 import android.util.Log;
 5 import android.view.MotionEvent;
 6 import android.view.WindowManager;
 7 import android.widget.ImageView;
 8 
 9 public class MyFloatView extends ImageView {
10     private float mTouchStartX;
11     private float mTouchStartY;
12     private float x;
13     private float y;
14     
15     
16     private WindowManager wm=(WindowManager)getContext().getApplicationContext().getSystemService("window");
17     
18     //此wmParams为获取的全局变量,用以保存悬浮窗口的属性
19     private WindowManager.LayoutParams wmParams = ((MyApplication)getContext().getApplicationContext()).getMywmParams();
20 
21     public MyFloatView(Context context) {
22         super(context);        
23         // TODO Auto-generated constructor stub
24     }
25     
26      @Override
27      public boolean onTouchEvent(MotionEvent event) {
28          
29          
30          //获取相对屏幕的坐标,即以屏幕左上角为原点         
31          x = event.getRawX();   
32          y = event.getRawY()-25;   //25是系统状态栏的高度
33          Log.i("currP", "currX"+x+"====currY"+y);
34          switch (event.getAction()) {
35             case MotionEvent.ACTION_DOWN:
36                 //获取相对View的坐标,即以此View左上角为原点
37                 mTouchStartX =  event.getX();  
38                 mTouchStartY =  event.getY();
39                 
40                 Log.i("startP", "startX"+mTouchStartX+"====startY"+mTouchStartY);
41                 
42                 break;
43             case MotionEvent.ACTION_MOVE:                
44                 updateViewPosition();
45                 break;
46 
47             case MotionEvent.ACTION_UP:
48                 updateViewPosition();
49                 mTouchStartX=mTouchStartY=0;
50                 break;
51             }
52             return true;
53         }
54      
55      private void updateViewPosition(){
56         //更新浮动窗口位置参数
57         wmParams.x=(int)( x-mTouchStartX);
58         wmParams.y=(int) (y-mTouchStartY);
59         wm.updateViewLayout(this, wmParams);
60         
61      }
62 
63 }
 1 package net.xsmile.fv;
 2 
 3 import android.app.Activity;
 4 import android.graphics.PixelFormat;
 5 import android.os.Bundle;
 6 import android.view.Gravity;
 7 import android.view.WindowManager;
 8 import android.view.WindowManager.LayoutParams;
 9 
10 public class MyFloatViewActivity extends Activity {
11     /** Called when the activity is first created. */
12     
13     private WindowManager wm=null;
14     private WindowManager.LayoutParams wmParams=null;
15     
16     private MyFloatView myFV=null;
17 
18     
19     @Override
20     public void onCreate(Bundle savedInstanceState) {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.main);
23         //创建悬浮窗口
24         createView();
25     
26     }
27     
28   
29     
30     private void createView(){
31         myFV=new MyFloatView(getApplicationContext());
32         myFV.setImageResource(R.drawable.icon);
33         //获取WindowManager
34         wm=(WindowManager)getApplicationContext().getSystemService("window");
35         //设置LayoutParams(全局变量)相关参数
36         wmParams = ((MyApplication)getApplication()).getMywmParams();
37 
38          /**
39          *以下都是WindowManager.LayoutParams的相关属性
40          * 具体用途可参考SDK文档
41          */
42         wmParams.type=LayoutParams.TYPE_PHONE;   //设置window type
43         wmParams.format=PixelFormat.RGBA_8888;   //设置图片格式,效果为背景透明
44 
45         //设置Window flag
46         wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL
47                               | LayoutParams.FLAG_NOT_FOCUSABLE;
48         /*
49          * 下面的flags属性的效果形同“锁定”。
50          * 悬浮窗不可触摸,不接受任何事件,同时不影响后面的事件响应。
51          wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL 
52                                | LayoutParams.FLAG_NOT_FOCUSABLE
53                                | LayoutParams.FLAG_NOT_TOUCHABLE;
54         */
55         
56         
57         wmParams.gravity=Gravity.LEFT|Gravity.TOP;   //调整悬浮窗口至左上角
58         //以屏幕左上角为原点,设置x、y初始值
59         wmParams.x=0;
60         wmParams.y=0;
61         
62         //设置悬浮窗口长宽数据
63         wmParams.width=40;
64         wmParams.height=40;
65     
66         //显示myFloatView图像
67         wm.addView(myFV, wmParams);
68         
69     }
70     
71     @Override
72     public void onDestroy(){
73         super.onDestroy();
74         //在程序退出(Activity销毁)时销毁悬浮窗口
75         wm.removeView(myFV);
76     }
77     
78    
79     
80 }
 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3       package="net.xsmile.fv"
 4       android:versionCode="1"
 5       android:versionName="1.0">
 6     <application android:name=".MyApplication" android:icon="@drawable/icon" android:label="@string/app_name">
 7         <activity android:name=".MyFloatViewActivity"
 8                   android:label="@string/app_name">
 9             <intent-filter>
10                 <action android:name="android.intent.action.MAIN" />
11                 <category android:name="android.intent.category.LAUNCHER" />
12             </intent-filter>
13         </activity>
14 
15     </application>
16     
17     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
18 
19 
20 </manifest> 

posted on 2012-10-26 17:09  liyanqingyang  阅读(4557)  评论(1编辑  收藏  举报

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