android.app.Application cannot be cast to com.example..AnalyticsApplication

问题

I am new to android and in a process of adding google analytics to one of my application. I am getting the following error when running my application.

android.app.Application cannot be cast to com.xxx.xxx.xxx.AnalyticsApplication

This is my main activity.

 package com.example.dell.testanalytics;

import android.content.Intent;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;

import android.app.Application;

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


public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    private Tracker mTracker;

     @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        AnalyticsApplication application = (AnalyticsApplication) getApplication();
        mTracker = application.getDefaultTracker();


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

// [START screen_view_hit]
        String name = getString(R.string.test);
        Log.i(TAG, "Setting screen name: " + name);
        mTracker.setScreenName("Image~" + name);
        mTracker.send(new HitBuilders.ScreenViewBuilder().build());
        // [END screen_view_hit]
        return false;
    }


}

The error is pointing the place I call the analytics application method.

This is my manifest file

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".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>


</application>

I cannot figure out what is wrong since i am not getting any errors or red lines in the code.

Would be great if i could get your assistance.

回答1:

If you wish to replace the singleton Application instance with some subclass of Application, you need to have the android:name attribute of the <application> element of your manifest point to that subclass.

回答2:

Well I believe everything answered ahead of me is true but it is more important where you place the android:name attribute. Do this in your manifest <application android:name="com.yourwebsite.appname.SubApplication" >...</application>
NOT

<application> android:name="com.yourwebsite.appname.SubApplication"
        ...</application>

Also do not add any more <application> tags use your original one!!

来源：https://stackoverflow.com/questions/32233507/android-app-application-cannot-be-cast-to-com-example-analyticsapplication

标签

android

google-analytics