Android之浮动小窗口 - lee0oo0

1 public class MyApplication extends Application {
2
3     /**
4      * 创建全局变量
5      * 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
6      *
7      * 这里使用了在Application中添加数据的方法实现全局变量
8      * 注意在AndroidManifest.xml中的Application节点添加android:name=".MyApplication"属性
9      *
10      */
11     private WindowManager.LayoutParams wmParams=new WindowManager.LayoutParams();
12
13     public WindowManager.LayoutParams getMywmParams(){
14         return wmParams;
15     }

1 public class MyFloatViewActivity extends Activity {
2
3
4     /** Called when the activity is first created. */
5
6     private WindowManager wm=null;
7     private WindowManager.LayoutParams wmParams=null;
8
9     private MyFloatView myFV=null;
10
11
12     @Override
13     public void onCreate(Bundle savedInstanceState) {
14         super.onCreate(savedInstanceState);
15         setContentView(R.layout.main);
16
18     }
19
22     private void createView(){
23         myFV=new MyFloatView(getApplicationContext());
24         myFV.setImageResource(R.drawable.icon);
25         //获取WindowManager
26         wm=(WindowManager)getApplicationContext().getSystemService("window");
27         //设置LayoutParams(全局变量）相关参数
28         wmParams = ((MyApplication)getApplication()).getMywmParams();
29
30          /**
31          *以下都是WindowManager.LayoutParams的相关属性
32          * 具体用途可参考SDK文档
33          */
34         wmParams.type=LayoutParams.TYPE_PHONE;   //设置window type
35         wmParams.format=PixelFormat.RGBA_8888;   //设置图片格式，效果为背景透明
36
37         //设置Window flag
38         wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL
39                               | LayoutParams.FLAG_NOT_FOCUSABLE;
40         /*
41          * 下面的flags属性的效果形同“锁定”。
42          * 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。
43          wmParams.flags=LayoutParams.FLAG_NOT_TOUCH_MODAL
44                                | LayoutParams.FLAG_NOT_FOCUSABLE
45                                | LayoutParams.FLAG_NOT_TOUCHABLE;
46         */
47
48
49         wmParams.gravity=Gravity.LEFT|Gravity.TOP;   //调整悬浮窗口至左上角
50         //以屏幕左上角为原点，设置x、y初始值
51         wmParams.x=0;
52         wmParams.y=0;
53
54         //设置悬浮窗口长宽数据
55         wmParams.width=40;
56         wmParams.height=40;
57
58         //显示myFloatView图像
59         wm.addView(myFV, wmParams);
60
61     }
62
63     @Override
64     public void onDestroy(){
65         super.onDestroy();
66         //在程序退出(Activity销毁）时销毁悬浮窗口
67         wm.removeView(myFV);
68     }
69
70     @Override
71     protected void onRestart() {
72         // TODO Auto-generated method stub
73         wm.removeView(myFV);
74         super.onRestart();
75     }
76
79     @Override
80     protected void onStop() {
81         // TODO Auto-generated method stub
82         //创建悬浮窗口
83         createView();
84         super.onStop();
85     }

1 public class MyFloatView extends ImageView {
2     private float mTouchStartX;
3     private float mTouchStartY;
4     private float x;
5     private float y;
6
8     private WindowManager wm=(WindowManager)getContext().getApplicationContext().getSystemService("window");
9
10     //此wmParams为获取的全局变量，用以保存悬浮窗口的属性
11     private WindowManager.LayoutParams wmParams = ((MyApplication)getContext().getApplicationContext()).getMywmParams();
12
13     public MyFloatView(Context context) {
14         super(context);
15         // TODO Auto-generated constructor stub
16     }
17
18      @Override
19      public boolean onTouchEvent(MotionEvent event) {
20
21          //getRawX()获取相对屏幕的坐标，即以屏幕左上角为原点
22          x = event.getRawX();
23          y = event.getRawY()-25;   //25是系统状态栏的高度
24          Log.i("currP", "currX"+x+"====currY"+y);
25          switch (event.getAction()) {
26             case MotionEvent.ACTION_DOWN:
27                 //getX()获取相对View的坐标，即以此View左上角为原点
28                 mTouchStartX =  event.getX();
29                 mTouchStartY =  event.getY();
30
31                 Log.i("startP", "startX"+mTouchStartX+"====startY"+mTouchStartY);
32
33                 break;
34             case MotionEvent.ACTION_MOVE:
35                 updateViewPosition();
36                 break;
37
38             case MotionEvent.ACTION_UP:
39                 updateViewPosition();
40                 mTouchStartX=mTouchStartY=0;
41                 break;
42             }
43             return true;
44         }
45
46      private void updateViewPosition(){
47         //更新浮动窗口位置参数,x是鼠标在屏幕的位置，mTouchStartX是鼠标在图片的位置
48         wmParams.x=(int)( x-mTouchStartX);
49         System.out.println(mTouchStartX);
50         wmParams.y=(int) (y-mTouchStartY);
51         wm.updateViewLayout(this, wmParams);
52
53      }
54
55 }