Android的WindowManager实现悬浮窗口

如果你想做一些不寻常的东西像创建浮动窗口并且不要填满屏幕。如果您想创建一个在其他应用程序前面可见的浮动窗口，则不能使用Activity，因为当另一个应用程序到达前台时，您的Activity将停止，其窗口将被隐藏或销毁。相反，您需要从后台服务显示窗口。

WindowManager.LayoutParams p = new WindowManager.LayoutParams(    // Shrink the window to wrap the content rather than filling the screen     WindowManager.LayoutParams.WRAP_CONTENT,    WindowManager.LayoutParams.WRAP_CONTENT,    // Display it on top of other application windows, but only for the current user    WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,    // Don't let it grab the input focus    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,    // Make the underlying application window visible through any transparent parts    PixelFormat.TRANSLUCENT);// Define the position of the window within the screenp.gravity = Gravity.TOP | Gravity.RIGHT;p.x = 0;p.y = 100;WindowManager windowManager = (WindowManager)getSystemService(WINDOW_SERVICE);windowManager.addView(myView, p);
需要添加权限
<uses-permission android:name=”android.permission.SYSTEM_ALERT_WINDOW”/>