popupwindow 增加半透明遮罩

 

//在show的時候加入addmask

 

private void addMask(IBinder token) {

WindowManager.LayoutParams wl = new WindowManager.LayoutParams();

wl.width = WindowManager.LayoutParams.MATCH_PARENT;

wl.height = WindowManager.LayoutParams.MATCH_PARENT;

wl.format = PixelFormat.TRANSLUCENT;//不設置這個彈出框的透明遮罩顯示爲黑色

wl.type = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL;//該Type描述的是形成的窗口的層級關係

wl.token = token;//獲取當前Activity中的View中的token,來依附Activity

maskView = new View(context);

maskView.setBackgroundColor(0x7f000000);

maskView.setFitsSystemWindows(false);

maskView.setOnKeyListener(new View.OnKeyListener() {

@Override

public boolean onKey(View v, int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_BACK) {

removeMask();

return true;

}

return false;

}

});

/**

* 通過WindowManager的addView方法創建View，產生出來的View根據WindowManager.LayoutParams屬性不同，效果也就不同了。

* 比如創建系統頂級窗口，實現懸浮窗口效果！

*/

windowManager.addView(maskView, wl);

}

 

public void removeMask() {

if (null != maskView) {

windowManager.removeViewImmediate(maskView);

maskView = null;

}

}

 

 

 

//記得監聽popupwindow消失時還原activity，

window.setOnDismissListener(new PopupWindow.OnDismissListener() {

@Override

public void onDismiss() {

removeMask();

}

});