Google Analytics - 来自活动的跟踪对象 [英] Google Analytics - Tracker Object from Activity

问题描述

我从一个活动创建Google Analytics跟踪器对象。问题是我在this.getApplication（）上执行的投射操作中出现错误。请让我知道如何从Activity创建一个跟踪器对象。

I am creating the Google Analytics Tracker object from an Activity. The issue is that I am getting an error in the cast operation done on this.getApplication(). Please let me know how to create a tracker object from an Activity.

public void sengToGoogleAnalytics() {
    Tracker t = ((AnalyticsSampleApp) this.getApplication()).getTracker(TrackerName.APP_TRACKER);
    t.setScreenName(getString(R.string.memoryhome));
    t.send(new HitBuilders.AppViewBuilder().build());
} 

Log

06-11 11:49:59.510: E/AndroidRuntime(2917): FATAL EXCEPTION: main06-11 11:49:59.510: E/AndroidRuntime(2917): java.lang.RuntimeException: Unable to start activity ComponentInfo{kids.animals.fruits.objects.brain.puzzle.memory.game.free/kids.animals.fruits.objects.brain.puzzle.memory.game.free.MemoryHome}: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): java.lang.RuntimeException: Unable to start activity ComponentInfo{kids.animals.fruits.objects.brain.puzzle.memory.game.free/kids.animals.fruits.objects.brain.puzzle.memory.game.free.MemoryHome}: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 06-11 11:49:59.510: E/AndroidRuntime(2917): 
06-11 11:49:59.510: E/AndroidRuntime(2917): 

推荐答案

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getApplication返回的对象是 android.app.Application ，它引发一个 ClassCastException ，如logcat中的以下行所示

Cause:
The object returned by getApplication is android.app.Application, which throws a ClassCastException, as indicated by the following line in the logcat

06-11 11：49：59.510：E / AndroidRuntime（2917）：导致：java.lang.ClassCastException：android.app.Application无法转换为kids.animals。 fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11

06-11 11:49:59.510: E/AndroidRuntime(2917): Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to kids.animals.fruits.objects.brain.puzzle.memory.game.free.AnalyticsSampleApp06-11

解决方案： <
这可能是由于您的清单不包含应用程序元素

<application android:name=".YourApplication"...
</application>

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