R.xml。preferences无法找到? [英] R.xml.preferences cannot be found?
问题描述
我试图建立一些简单的preferences一个Android应用程序,但不能让过去这个错误:XML不能得到解决,或者不是一个领域。我已经清洗,刷新,重新启动Eclipse和跳舞跳汰 - 但我不能动摇的错误。我究竟做错了什么?
I'm trying to set up some simple preferences for an Android app, but can't get past this error: "xml cannot be resolved or is not a field." I have cleaned, refreshed, restarted eclipse, and danced the jig - but I can't shake the error. What am I doing wrong?
在preferences.xml文件:
The preferences.xml file:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="Dev options">
<CheckBoxPreference
android:key="devtools"
android:title="Enable clearing user"
android:summary="Enable clearing user" />
</PreferenceCategory>
</PreferenceScreen>
Java类文件:
The java class file:
package com.myapp.prototype;
import android.os.Bundle;
import android.preference.PreferenceFragment;
public class GCPreferencesActivity extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Load preferences from XML resource
addPreferencesFromResource(R.xml.preferences); // error on this line ??
}
}
感谢您的帮助。
Thanks for any help.
推荐答案
我想你已经错过了一个进口(如文森特说,在评论)。你应该增加:
I think you have missed an import (as said Vincent in comments). you should add:
import com.myapp.prototype.R;
此错误还出现,如果你把你的code:
The error also appears if your put in your code:
import android.R;
这是令人困惑,因为R被解决,但没有你在XML文件中定义的属性(当然,这是不好的 - [R!)。
which is confusing because R is resolved but has no attribute that you defined in your XML file (of course, it is not the good R !).
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