[Android learning abbreviated Click to return to the desktop without exiting the application

[Implementation code] moveTaskToBack (true)

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {//监听backspace按钮，返回桌面
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            moveTaskToBack(true);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }