android - 如何使用系统覆盖窗口隐藏导航栏

Question

LockScreenReceiver.java

public class LockScreenReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        //If the screen was just turned on or it just booted up, start your Lock Activity
        if(action.equals(Intent.ACTION_SCREEN_OFF) || action.equals(Intent.ACTION_BOOT_COMPLETED))
        {

            //Create a window manager params
            WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                    WindowManager.LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                            | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
                    PixelFormat.TRANSLUCENT);
            //makeFullScreen((Activity) context);

            WindowManager wm = (WindowManager) context.getSystemService(context.WINDOW_SERVICE);
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);

            final View myView = inflater.inflate(R.layout.my_view, null);

            myView.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    Log.d("TAG", "touch me");
                    myView.setVisibility(View.GONE);
                    return true;
                }
            });

            // Add layout to window manager
            wm.addView(myView, params);
        }
    }

}

我有什么: 我有如下所示的输出，这是点击它时的 View ，它的可见性消失了

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我正在尝试做的事情:我想在加载上述 View 时隐藏具有后退和中心按钮的栏。

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如何实现？

Answer 1

    WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
    lp.format = PixelFormat.RGBA_8888;
    lp.flags = WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
            | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
            | WindowManager.LayoutParams.FLAG_FULLSCREEN;
    lp.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
    lp.height = ViewGroup.LayoutParams.MATCH_PARENT;
    lp.width = ViewGroup.LayoutParams.MATCH_PARENT;

    int flag =  View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;

    mRootView.setSystemUiVisibility(flag);
    mWindowManager.addView(mRootView, getLayoutParams());

不要使用WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE，这个标志会让导航栏一直显示。我不知道为什么。