Android使用WindowManager投屏方案

    public Context mSecondScreenContext;
    private WindowManager mWindowManager;
    private WindowManager.LayoutParams mLayoutParams;
    private View mView;
    public void displaySecondScreen(Context context) {
        DisplayManager mDisplayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
        Display[] displays = mDisplayManager.getDisplays();
        if (displays.length > 1) {
            //mContext = createDisplayContext(displays[displays.length - 1]);
            mSecondScreenContext = context.createDisplayContext(displays[1]);
        } else {
            mSecondScreenContext = null;
        }
        mWindowManager = (WindowManager) mSecondScreenContext.getSystemService(Context.WINDOW_SERVICE);
        mLayoutParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.MATCH_PARENT,
                0, 0,
                PixelFormat.TRANSPARENT);
        mLayoutParams.gravity = Gravity.CENTER;
        mLayoutParams.x = 0;
        mLayoutParams.y = 0;

        mLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_FULLSCREEN
                | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
                | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                | WindowManager.LayoutParams.FLAG_BLUR_BEHIND
                | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR
                | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
        mLayoutParams.type = WindowManager.LayoutParams.FIRST_SYSTEM_WINDOW + 100;
        mView = LayoutInflater.from(mSecondScreenContext).inflate(R.layout.common_alert_window, null);
    }