Google分析的Android getActivity（）。getApplication（）無法投射到AnalyticsApplication

Question

這個，我得到了錯誤的代碼

@Override 
    public void onViewCreated(View view, Bundle savedInstanceState) { 
     super.onViewCreated(view, savedInstanceState); 

     // Obtain the shared Tracker instance. 
     AnalyticsApplication application = (AnalyticsApplication) getActivity().getApplication(); 
     mTracker = application.getDefaultTracker(); 
} 

這是我AnalyticsApplication類

package auc.games2.Analytics; 
/* 
* Copyright Google Inc. All Rights Reserved. 
* 
* Licensed under the Apache License, Version 2.0 (the "License"); 
* you may not use this file except in compliance with the License. 
* You may obtain a copy of the License at 
* 
*  http://www.apache.org/licenses/LICENSE-2.0 
* 
* Unless required by applicable law or agreed to in writing, software 
* distributed under the License is distributed on an "AS IS" BASIS, 
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
* See the License for the specific language governing permissions and 
* limitations under the License. 
*/ 


     import android.app.Application; 

     import com.google.android.gms.analytics.GoogleAnalytics; 
     import com.google.android.gms.analytics.Logger; 
     import com.google.android.gms.analytics.Tracker; 

     import auc.games2.R; 

/** 
* This is a subclass of {@link Application} used to provide shared objects for this app, such as 
* the {@link Tracker}. 
*/ 
public class AnalyticsApplication extends Application { 
    private Tracker mTracker; 

    /** 
    * Gets the default {@link Tracker} for this {@link Application}. 
    * @return tracker 
    */ 
    synchronized public Tracker getDefaultTracker() { 
     if (mTracker == null) { 
      GoogleAnalytics analytics = GoogleAnalytics.getInstance(this); 
      // To enable debug logging use: adb shell setprop log.tag.GAv4 DEBUG 
      mTracker = analytics.newTracker(R.xml.global_tracker); 
     } 
     return mTracker; 
    } 
} 

這是錯誤的logcat的

03-09 18：46：11.070 32602-32602/auc.games2.multigame1 E/AndroidRuntime： FATAL EX CEPTION：主要 java.lang.ClassCastException：android.app.Application不能auc.games2.UI.Fragments.inicial.onViewCreated施放 到auc.games2.Analytics.AnalyticsApplication （inicial.java:127） 在 android.app.FragmentManagerImpl.moveToState在 android.app.FragmentManagerImpl.moveToState（FragmentManager.java:1035）（FragmentManager.java:843） 在android.app.BackStackRecord.run（BackStackRecord.java:635） 在 android.app.FragmentManagerImpl.execPendingActions（FragmentManager.java:1399） at android.app.FragmentManagerIm pl $ 1.run（FragmentManager.java:426） at android.os.Handler.handleCallback（Handler.java:615） at android.os.Handler.dispatchMessage（Handler.java:92） at android.os.Looper .loop（Looper.java:137） at android.app.ActivityThread.main（ActivityThread.java:4867） 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:1007） at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:774 ） at d alvik.system.NativeStart.main（本機方法）

Answer 1

你AndroidManifest.xml文件不包含您的自定義Application子類，因此Android是使用默認的（android.app.Application）。

爲您的<application>元素添加一個android:name="auc.games2.Analytics.AnalyticsApplication"屬性。