Android – PreferenceActivity actionbar主页图标不会返回家(不像ET :)

我的偏好活动除了一件事情外,还是有效的.在所有其他活动中完美地将用户返回给先前活动的ActionBar图标在PreferenceActivity中不起作用.当我点击图标时,它将闪烁,就像它将返回到上一个活动,但是PreferenceActivity保持在屏幕上.有趣的是,后退按钮确实会将用户返回到上一个活动.有没有办法使ActionBar的Home图标在“PreferenceActivity”中正常工作？

这是代码：

public class SettingsActivity extends PreferenceActivity implements OnSharedPreferencechangelistener {

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  // Set actionBar controls for Settings
    TextView actionBarTitle = (TextView) findViewById(Resources.getSystem().getIdentifier("action_bar_title","id","android"));
    ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);  
    actionBar.setIcon(R.drawable.ic_launcher); 
    actionBar.setdisplayShowTitleEnabled(true); 
    actionBarTitle.setTextColor(Color.WHITE);
    actionBarTitle.setTextSize(16); 
    actionBar.setTitle(R.string.settings_menu_title);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {  //Build.VERSION_CODES.ICE_CREAM_SANDWICH
        actionBar.setHomeButtonEnabled(true); 
        actionBar.setdisplayHomeAsUpEnabled(true); // show back arrow on title icon
        actionBar.setdisplayShowHomeEnabled(true);
    }
...... Handle prefs (all working fine).....
   }

}

//////呼叫代码////////

//Use menu button to access settings screen
    @Override
   public boolean onKeyDown(int keycode,KeyEvent e) {
       switch(keycode) {
        case KeyEvent.KEYCODE_MENU:
            Intent intent = new Intent(this,SettingsActivity.class);
            startActivity(intent);
            return true;
       }
       return super.onKeyDown(keycode,e);
    }  // [END onKeyDown (for menu click capture) ]

解决方法

感谢@Axarydax指出我正确的方向.我意识到PreferenceActivity与我的其他活动不同,因为Home按钮返回到调用Activity而不是MainActivity.因此,解决方案需要(1)使用startActivityForResult(而不是startActivity)调用PreferenceActivity,(2)使用PreferenceActivity中的onoptionsItemSelected来管理返回值(per @ Axarydax的答案). (1)和(2)如下所示：

// (1) Menu button used to access PreferenceActivity
 @Override
  public boolean onKeyDown(int keycode,KeyEvent e) {
      switch(keycode) {
        case KeyEvent.KEYCODE_MENU:
          Intent intent = new Intent(this,SettingsActivity.class);
          startActivityForResult(intent,1);  //enables return to here
          return true;
        }
      return super.onKeyDown(keycode,e);
  }  

 // (2) Return to calling activity from PreferenceActivity
   @Override
 public boolean onoptionsItemSelected(MenuItem item) {
     if (item.getItemId() == android.R.id.home) {
         int SUCCESS_RESULT=1;
         setResult(SUCCESS_RESULT,new Intent());
         finish();  //return to caller
         return true;
     }
     return false;
 }