android 中对返回事件的处理

方法一：

<pre name="code" class="java" style="color: rgb(51, 51, 51); font-size: 14px; line-height: 21px;">@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_BACK) { 
        return true;
    }

<span style="font-family: Arial;">   return super.onKeyDown(keyCode, event);</span><br style="font-family: Arial; padding: 0px; margin: 0px; background-color: inherit;" /><span style="font-family: Arial;">}</span>

方法二：

@Override
public void onBackPressed() {}