Android Window Manager阻止系统后退键

Question

我有一个像Facebook聊天buble的浮动视图,但与它不同,我的叠加层有一个EditText,需要具有焦点.

这是我的浮动视图代码

        //Inflate the floating view layout we created
        mFloatingView = LayoutInflater.from(this).inflate(R.layout.floating_widget_layout, null);

        //Add the view to the window.
        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.TYPE_PHONE,
                WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
                PixelFormat.TRANSLUCENT);

        //Specify the view position
        params.gravity = Gravity.TOP | Gravity.START;        //Initially view will be added to top-left corner
        params.x = 0;
        params.y = 100;

        //Add the view to the window
        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        mWindowManager.addView(mFloatingView, params);

它几乎是好的,但有一个问题.当我从服务创建叠加时,系统后退按钮不起作用.如果我使用FLAG_NOT_FOCUSABLE系统按钮; 家庭,最近和后面的工作如预期.我在SO做了一些研究,发现这是一个安全问题,所以我开始寻找替代解决方案,然后发现这改变了我的代码

// Wrapper for intercepting System/Hardware key events
ViewGroup wrapper = new FrameLayout(this) {
    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        if (event.getKeyCode()==KeyEvent.KEYCODE_BACK) {
            Log.v("Back", "Back Key");
            return true;
        }
        return super.dispatchKeyEvent(event);
    }
};

//Inflate the floating view layout we created
mFloatingView = LayoutInflater.from(this).inflate(R.layout.floating_widget_layout, wrapper);

//Add the view to the window.
final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.WRAP_CONTENT,
        WindowManager.LayoutParams.TYPE_PHONE,
        WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
        PixelFormat.TRANSLUCENT);

//Specify the view position
params.gravity = Gravity.TOP | Gravity.START;        //Initially view will be added to top-left corner
params.x = 0;
params.y = 100;

//Add the view to the window
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
mWindowManager.addView(mFloatingView, params);

现在我可以从我的浮动视图中取回按钮但是如何将此事件(反压)传递给前台应用程序(其他应用程序,而不是我的)？我找到了这个,但它没有帮助我

如果有人可以帮助我或者至少提供线索,我将不胜感激

摘要

我有一个叠加视图,它需要是可聚焦的,但是当它可以聚焦时,按下按钮不工作我怎么能解决这个问题？

Answer 1

本教程似乎有一个解决方案：https://www.geeksforgeeks.org/how-to-make-a-floating-window-application-in-android/

他们FLAG_NOT_FOCUSABLE最初进行设置，以便覆盖层不会干扰系统后退功能等。他们在 EditText 上设置 onTouch 侦听器，并将标志更新到FLAG_NOT_TOUCH_MODAL此时，以便可以输入文本。