问题描述
附加 GestureDetector 来一个<一的挑战href="http://developer.android.com/reference/android/$p$pference/List$p$pference.html">List$p$pference是2倍：
- 获取一个句柄，这只是在preferences.xml定义（即Java的code没有实例化）的列表preference。
- 列表preference既不是一个查看，也没有活动的子类。
是否有可能在所有附加 GestureDetector 来一个<一个href="http://developer.android.com/reference/android/$p$pference/List$p$pference.html">List$p$pference?
Is it possible at all to attach a GestureDetector to a ListPreference?
如果是这样，如何将一去吗？我会在哪里写的code实例GestureDetector并实施监听？
If so, how would one go about this? Where would I write the code to instantiate GestureDetector and implement the listener?
推荐答案
除非我不太正确赶的问题，答案很可能是简单的比你想象的。该人士$ C $下目录preferece 教导我们，它比周围的 AlertDialog ，一个包装而已在 ListView控件显示各种选项。现在， AlertDialog 实际上允许你得到的的ListView 它缠上，这可能是你所需要的句柄。
Unless I didn't quite catch the question correctly, the answer is probably simpler than you might think. The source code for ListPreferece teaches that it's little more than a wrapper around an AlertDialog that displays its various options in a ListView. Now, AlertDialog actually allows you to get a handle on the ListView it wraps, which is probably all you need.
在评论一个你表明，在这个阶段，所有你感兴趣的是检测列表中的任何项目一个长期preSS。因此，而不是回答这个通过附加 GestureDetector ，我会简单地使用 OnItemLongClickListener 。
In one of the comments you indicated that, at this stage, all you're interested in is detecting a long-press on any item in the list. So rather than answering that by attaching a GestureDetector, I'll simply use an OnItemLongClickListener.
public class ListPreferenceActivity extends PreferenceActivity implements OnPreferenceClickListener {
private ListPreference mListPreference;
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.list_prefs);
mListPreference = (ListPreference) findPreference("pref_list");
mListPreference.setOnPreferenceClickListener(this);
}
@Override
public boolean onPreferenceClick(Preference preference) {
AlertDialog dialog = (AlertDialog) mListPreference.getDialog();
dialog.getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override public boolean onItemLongClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(getApplicationContext(), "Long click on index " + position + ": "
+ parent.getItemAtPosition(position).toString(), Toast.LENGTH_SHORT).show();
return false;
}
});
return false;
}
}
结果（这在长按显示吐司）：
The result (which the toast in the long-click displaying):
通过一个参照的ListView ，你也可以附加一个 OnTouchListener ， GestureDetector 等你来从这里走了。
With a reference to the ListView, you could also attach an OnTouchListener, GestureDetector etc. Up to you to go from here.
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