1 public class MainActivity extends Activity {
 2     @Override
 3     public void onCreate(Bundle savedInstanceState) {
 4         super.onCreate(savedInstanceState);
 5         setContentView(R.layout.main);
 6         // FloatingWindowActivity的布局视图按钮
 7         Button start = (Button) findViewById(R.id.start_id);
 8         Button remove = (Button) findViewById(R.id.remove_id);
 9         start.setOnClickListener(new OnClickListener() {
10             @Override
11             public void onClick(View v) {
12                 // TODO Auto-generated method stub
13                 Intent intent = new Intent(MainActivity.this, FxService.class);
14                 startService(intent);
15                 finish();
16             }
17         });
18 
19         remove.setOnClickListener(new OnClickListener() {
20             @Override
21             public void onClick(View v) {
22                 Intent intent = new Intent(MainActivity.this, FxService.class);
23                 stopService(intent);
24             }
25         });
26 
27     }
28 }

 1 private void createFloatView() {
 2     wmParams = new WindowManager.LayoutParams();
 3     // 获取WindowManagerImpl.CompatModeWrapper
 4     mWindowManager = (WindowManager) getApplication().getSystemService(
 5             getApplication().WINDOW_SERVICE);
 6     // 设置window type
 7     wmParams.type = LayoutParams.TYPE_PHONE;
 8     // 设置图片格式，效果为背景透明
 9     wmParams.format = PixelFormat.RGBA_8888;
10     // 设置浮动窗口不可聚焦（实现操作除浮动窗口外的其他可见窗口的操作）
11     wmParams.flags =
12     // LayoutParams.FLAG_NOT_TOUCH_MODAL |
13     LayoutParams.FLAG_NOT_FOCUSABLE
14     // LayoutParams.FLAG_NOT_TOUCHABLE
15     ;
16 
17     // 调整悬浮窗显示的停靠位置为左侧置顶
18     wmParams.gravity = Gravity.LEFT | Gravity.TOP;
19 
20     // 以屏幕左上角为原点，设置x、y初始值
21     wmParams.x = 0;
22     wmParams.y = 0;
23 
24     /*
25      * // 设置悬浮窗口长宽数据 wmParams.width = 200; wmParams.height = 80;
26      */
27 
28     // 设置悬浮窗口长宽数据
29     wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
30     wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
31 
32     LayoutInflater inflater = LayoutInflater.from(getApplication());
33     // 获取浮动窗口视图所在布局
34     mFloatLayout = (LinearLayout) inflater.inflate(R.layout.float_layout,
35             null);
36     // 添加mFloatLayout
37     mWindowManager.addView(mFloatLayout, wmParams);
38 
39     Log.i(TAG, "mFloatLayout-->left" + mFloatLayout.getLeft());
40     Log.i(TAG, "mFloatLayout-->right" + mFloatLayout.getRight());
41     Log.i(TAG, "mFloatLayout-->top" + mFloatLayout.getTop());
42     Log.i(TAG, "mFloatLayout-->bottom" + mFloatLayout.getBottom());
43 
44     // 浮动窗口按钮
45     mFloatView = (Button) mFloatLayout.findViewById(R.id.float_id);
46     mFloatLayout.measure(View.MeasureSpec.makeMeasureSpec(0,
47             View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
48             .makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
49     Log.i(TAG, "Width/2--->" + mFloatView.getMeasuredWidth() / 2);
50     Log.i(TAG, "Height/2--->" + mFloatView.getMeasuredHeight() / 2);
51     // 设置监听浮动窗口的触摸移动
52     mFloatView.setOnTouchListener(new OnTouchListener() {
53 
54         @Override
55         public boolean onTouch(View v, MotionEvent event) {
56             // TODO Auto-generated method stub
57             // getRawX是触摸位置相对于屏幕的坐标，getX是相对于按钮的坐标
58             wmParams.x = (int) event.getRawX()
59                     - mFloatView.getMeasuredWidth() / 2;
60             // Log.i(TAG, "Width/2--->" + mFloatView.getMeasuredWidth()/2);
61             Log.i(TAG, "RawX" + event.getRawX());
62             Log.i(TAG, "X" + event.getX());
63             // 25为状态栏的高度
64             wmParams.y = (int) event.getRawY()
65                     - mFloatView.getMeasuredHeight() / 2 - 25;
66             // Log.i(TAG, "Width/2--->" + mFloatView.getMeasuredHeight()/2);
67             Log.i(TAG, "RawY" + event.getRawY());
68             Log.i(TAG, "Y" + event.getY());
69             // 刷新
70             mWindowManager.updateViewLayout(mFloatLayout, wmParams);
71             return false;
72         }
73     });
74 
75     mFloatView.setOnClickListener(new OnClickListener() {
76         @Override
77         public void onClick(View v) {//显示当前是哪个应用在顶层
78             // TODO Auto-generated method stub
79             pm = getPackageManager();
80             am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
81             String packageName = am.getRunningTasks(1).get(0).topActivity
82                     .getPackageName();
83             try {
84                 String progressName = pm.getApplicationLabel(
85                         pm.getApplicationInfo(packageName,
86                                 PackageManager.GET_META_DATA)).toString();
87                 mFloatView = (Button) mFloatLayout
88                         .findViewById(R.id.float_id);
89                 mFloatView.setText(progressName);
90                 Toast.makeText(FxService.this, progressName,
91                         Toast.LENGTH_SHORT).show();
92             } catch (NameNotFoundException e) {
93                 // TODO Auto-generated catch block
94                 e.printStackTrace();
95             }
96         }
97     });
98 }