无法获取操作栏的片段类 [英] Can't get Action Bar in fragment class
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问题描述
我有一个内部的三份片段类的活动。试图从他们的内部改变操作栏冠军时,我得到一个错误。如果我尽量让班级只是公众,而不是公共静态,我得到一个错误,当我尝试启动类。它应该是pretty的清楚,code是preferences尽管这不应该改变任何东西。这里的code:
包com.simon.wikiics;
。进口的Android preference *。
进口android.os *。
导入的java.util。*;
公共类MainSettingsActivity扩展preferenceActivity {
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
}
@覆盖
公共无效onBuildHeaders(名单<头>目标){
loadHeadersFromResource(R.xml.headers,目标);
}
//如果我不作类的静态当我尝试启动它们我的应用程序的力量关闭
公共静态类NavigationSettingsActivity扩展preferenceFragment {
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
加preferencesFromResource(R.xml.navigation);
//该getActionBar()是什么让我的错误
getActionBar()的setTitle(导航)。
}
}
公共静态类InterfaceSettingsActivity扩展preferenceFragment {
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
加preferencesFromResource(R.xml.interf);
//该getActionBar()是什么让我的错误
getActionBar()的setTitle(接口)。
}
}
公共静态类OtherSettingsActivity扩展preferenceFragment {
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
加preferencesFromResource(R.xml.other);
//该getActionBar()是什么让我的错误
getActionBar()的setTitle(其他)。
}
}
}
解决方案
一个静态类不能看到另一个类的私有领域。您将需要使用 getActivity()。getActionBar()
检索它。
I have an activity with three fragment classes inside it. I get an error when trying to change the action bar title from inside of them. If I try to make the classes just public and not public static I get an error when I try to start that class. It should be pretty clear that the code is for preferences although that shouldn't change anything . Here's the code:
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");
}
}
}
解决方案
A static class cannot see private fields of another class. You will need to use getActivity().getActionBar()
to retrieve it.
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