同时我不知道为什么我的导航不起作用。在我的主菜单中有 2 个图标可以切换到不同的活动:搜索和设置。但是每次我点击搜索时,settingsActivity 都会打开。我检查了搜索的 ID,在清单中输入了活动......
如果我在视图中添加一个额外的按钮并尝试启动 searchActivity,一切正常。但是,即使我注释掉 R.id.settingsMenu-thing 案例,如果我单击搜索符号,也会打开 settingsActivity ......有什么想法吗?:( 提前致谢!
MainActivity.java
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.mainmenu, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item){
Intent intent = null;
switch(item.getItemId()){
case android.R.id.home:
intent = new Intent(this,MainActivity.class);
startActivity(intent);
break;
case R.id.searchMenu:
intent = new Intent(this,SearchActivity.class);
startActivity(intent);
break;
case R.id.settingsMenu:
intent = new Intent(this,SettingsActivity.class);
startActivity(intent);
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
清单.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.anothertest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:debuggable="true">
<activity
android:name="android.app.ui.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="android.app.ui.SearchActivity" android:label="@string/search"></activity>
<activity android:name="android.app.ui.SettingsActivity" android:label="@string/settings"></activity>
<activity android:name="android.app.ui.NoArticleInListActivity"></activity>
</application>
</manifest>
主菜单.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/searchMenu"
android:title="@string/search"
android:icon="@android:drawable/ic_menu_search"
android:orderInCategory="1"
android:showAsAction="always">
</item>
<item
android:id="@+id/settingsMenu"
android:orderInCategory="2"
android:showAsAction="always"
android:title="@string/action_settings"
android:icon="@android:drawable/ic_menu_preferences">
</item>
</menu>
编辑
设置片段
public class SettingsFragment extends PreferenceFragment{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
}
}
设置活动
public class SettingsActivity extends Activity{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
getFragmentManager().beginTransaction().replace(android.R.id.content, new SettingsFragment()).commit();
}
protected void onStart(){
super.onStart();
getActionBar().setDisplayHomeAsUpEnabled(true);
}
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case android.R.id.home:
Intent intent = new Intent(this,MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
default:
return super.onOptionsItemSelected(item);
}
}
}
首选项.xml
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="@string/settingsSummaryCalendar">
android:key="pref_calendar_settings">
<CheckBoxPreference
android:key="prefArticleAsCalendarEntry"
android:summary="@string/settingsSummaryCalendarEntry"
android:title="@string/settingCreateEntryForEach"
android:defaultValue="true"/>
<CheckBoxPreference
android:key="prefCreateOwnCalendar"
android:summary="@string/settingsSummaryCalendar"
android:title="@string/settingCreateOwnCalendar"
android:defaultValue="true"/>
</PreferenceCategory>
<PreferenceCategory
android:title="@string/settingsSummaryNotification">
android:key="pref_notification_settings">
<CheckBoxPreference
android:key="prefNotification"
android:summary="@string/settingsSummaryNotification"
android:title="@string/settingsNotification"
android:defaultValue="true" >
</CheckBoxPreference>
<ListPreference
android:key="prefNotificationTime"
android:entries="@array/notificationTime"
android:entryValues="@array/notificationTimeValues"
android:summary="@string/settingsSummaryNotificationTime"
android:title="@string/settingsNotificationTime"
android:defaultValue="@string/settingsNotificationTime_default"
android:dependency="prefNotification">
</ListPreference>
</PreferenceCategory>
</PreferenceScreen>