我有一个包含三个片段类的活动。 当我尝试从它们内部更改操作栏标题时，会出现错误。 如果我尝试使这些类只是公共的而不是public static，那么当我尝试启动该类时就会出现错误。 显然，该代码是用于首选项的，但这不应改变任何内容。以下是代码：
package com.simon.wikiics;
import android.preference.*;
import android.os.*;
import java.util.*;
public class MainSettingsActivity extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onBuildHeaders(List<Header> target) {
loadHeadersFromResource(R.xml.headers, target);
}
//If I don't make the classes static my app force closes when I try to start them
public static class NavigationSettingsActivity extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.navigation);
//The getActionBar() is what is giving me the error
getActionBar().setTitle("Navigation");
}
}
public static class InterfaceSettingsActivity extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.interf);
//The getActionBar() is what is giving me the error
getActionBar().setTitle("Interface");
}
}
public static class OtherSettingsActivity extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.other);
//The getActionBar() is what is giving me the error
getActionBar().setTitle("Other");
}
}
}