Android 返回键执行home键

重写 onKeyDown 方法

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
            //返回执行home键功能
            moveTaskToBack(true);
            return true;
        }
        return super.onKeyDown(keyCode, event);
     }