与onOptionsItemSelected的致命例外

Question

与Android Studio我为我的应用程序创建了settings（这是我第一次这样做）。我有一个onOptionsItemSelected的问题，我不知道如何继续。 这是我LogCat：

FATAL EXCEPTION: main 
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.ultimate.app.test/com.ultimate.app.SettingsActivity}; have you declared this activity in your AndroidManifest.xml? <!-- I have declareted it --> 
     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1618) 
     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1417) 
     at android.app.Activity.startActivityFromChild(Activity.java:3843) 
     at android.app.Activity.startActivityFromChild(Activity.java:3819) 
     at android.app.Activity.startActivityForResult(Activity.java:3395) 
     at android.app.Activity.startActivityForResult(Activity.java:3331) 
     at android.app.Activity.startActivity(Activity.java:3566) 
     at android.app.Activity.startActivity(Activity.java:3534) 
     at com.ultimate.app.Tab1Activity.onOptionsItemSelected(Tab1Activity.java:106) 
     at android.app.Activity.onMenuItemSelected(Activity.java:2548) 
     at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:980) 
     at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735) 
     at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149) 
     at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874) 
     at com.android.internal.view.menu.ListMenuPresenter.onItemClick(ListMenuPresenter.java:166) 
     at android.widget.AdapterView.performItemClick(AdapterView.java:298) 
     at android.widget.AbsListView.performItemClick(AbsListView.java:1100) 
     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2749) 
     at android.widget.AbsListView$1.run(AbsListView.java:3423) 
     at android.os.Handler.handleCallback(Handler.java:725) 
     at android.os.Handler.dispatchMessage(Handler.java:92) 
     at android.os.Looper.loop(Looper.java:137) 
     at android.app.ActivityThread.main(ActivityThread.java:5191) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:511) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 
     at dalvik.system.NativeStart.main(Native Method) 

的manifest：

<application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@android:style/Theme.NoTitleBar"> 
    <activity 
     android:name=".MainActivity" 
     android:screenOrientation="portrait" 
     > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    ... 
    <activity android:name=".SettingsActivity" 
     android:screenOrientation="portrait"/> 
</application> 

，这就是我在我的java.class：

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 
@Override 
public boolean onOptionsItemSelected(MenuItem item) { 

    int i = item.getItemId(); 
    if (i == R.id.actiorn) { 
     Intent intent = new Intent(Tab1Activity.this,SettingsActivity.class); 
     Tab1Activity.this.startActivity(intent); 
     finish(); 
    } 
    return true; 

    } 

Answer 1

试试这个：

<application 
android:allowBackup="true" 
android:icon="@drawable/ic_launcher" 
android:label="@string/app_name" 
android:theme="@android:style/Theme.NoTitleBar"> 
<activity 
    android:name=".MainActivity" 
    android:screenOrientation="portrait" 
    > 
    <intent-filter> 
     <action android:name="android.intent.action.MAIN" /> 

     <category android:name="android.intent.category.LAUNCHER" /> 
    </intent-filter> 
</activity> 
... 
<activity android:name="com.ultimate.app.SettingsActivity" 
    android:screenOrientation="portrait"/>