java - 无法从getApplication()将异常MultiDexApplication强制转换为类

Question

我已经按照这里的答案，但它并没有改变任何东西:

exception android.support.multidex.MultiDexApplication cannot be cast class

我有一个MyApplication类，用于扩展MultiDexApplication。在我的主要 Activity 中，我调用getApplication()并将其强制转换为(MyApplication)。我的 list 的应用程序名称设置为.MyApplication。这是在Android Studio中。任何帮助，将不胜感激。谢谢!

错误:

FATAL EXCEPTION: main
                                                                                   Process: com.gametest.gametest123, PID: 4804
                                                                                   java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gametest.gametest123/com.gametest.gametest123.GamesActivity}: java.lang.ClassCastException: android.support.multidex.MultiDexApplication cannot be cast to com.gametest.gametest123.MyApplication
                                                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2205)
                                                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2255)
                                                                                       at android.app.ActivityThread.access$800(ActivityThread.java:142)
                                                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1203)
                                                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                       at android.os.Looper.loop(Looper.java:136)
                                                                                       at android.app.ActivityThread.main(ActivityThread.java:5118)
                                                                                       at java.lang.reflect.Method.invokeNative(Native Method)
                                                                                       at java.lang.reflect.Method.invoke(Method.java:515)
                                                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
                                                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
                                                                                       at dalvik.system.NativeStart.main(Native Method)
                                                                                    Caused by: java.lang.ClassCastException: android.support.multidex.MultiDexApplication cannot be cast to com.gametest.gametest123.MyApplication
                                                                                       at com.gametest.gametest123.GamesActivity.onCreate(GamesActivity.java:124)
                                                                                       at android.app.Activity.performCreate(Activity.java:5275)
                                                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
                                                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
                                                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2255) 
                                                                                       at android.app.ActivityThread.access$800(ActivityThread.java:142) 
                                                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1203) 
                                                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                       at android.os.Looper.loop(Looper.java:136) 
                                                                                       at android.app.ActivityThread.main(ActivityThread.java:5118) 
                                                                                       at java.lang.reflect.Method.invokeNative(Native Method) 
                                                                                       at java.lang.reflect.Method.invoke(Method.java:515) 
                                                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 
                                                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606) 
                                                                                       at dalvik.system.NativeStart.main(Native Method) 

表现:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
    package="com.gametest.gametest123"
    android:versionCode="33"
    android:versionName="3.0.7" >

    <uses-sdk android:minSdkVersion="15" android:targetSdkVersion="26" />

    <!-- Only this application can receive the messages and registration result -->
    <permission android:name="com.gametest.gametest123.permission.C2D_MESSAGE" android:protectionLevel="signature" />
    <uses-permission android:name="com.gametest.gametest123.permission.C2D_MESSAGE" />

    <!-- This app has permission to register and receive message -->
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

    <!-- Send the registration id to the server -->
    <uses-permission android:name="android.permission.INTERNET" />

    <!-- Generic permissions -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!-- calldorado Permissions-->
    <uses-feature android:name="android.hardware.telephony" android:required="false"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" 
        android:maxSdkVersion="22" ><!--Calldorado XML analyzer inserted the attribute android:maxSdkVersion="22" in order to make the code compatible with the Google Play store-->
    </uses-permission>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" 
        android:maxSdkVersion="22" ><!--Calldorado XML analyzer inserted the attribute android:maxSdkVersion="22" in order to make the code compatible with the Google Play store-->
    </uses-permission>
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_CALL_LOG" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

    <supports-screens
        android:smallScreens="true"
        android:normalScreens="true"
        android:largeScreens="true"
        />

    <application
        android:icon="@drawable/icon"
        android:label="@string/SHORT_APP_NAME"
        android:name=".MyApplication"
        tools:replace="android:label">



        <receiver
                android:name="com.google.android.gcm.GCMBroadcastReceiver"
                android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />

                <category android:name="com.gametest.gametest123" />
            </intent-filter>
        </receiver>

        <receiver android:name="com.gametest.gametest123.LocalNotification"></receiver>

        <receiver android:name="com.gametest.gametest123.CloseApp"></receiver>

        <service android:name="com.gametest.gametest123.GCMIntentService" />

        <activity
            android:name="com.gametest.gametest123.activities.ViewApp"
            android:label="@string/SHORT_APP_NAME"
            android:theme="@android:style/Theme.NoTitleBar"
            android:screenOrientation="portrait"
            />

        <activity
                android:name="com.gametest.gametest123.LoadViewApp"
                android:label="@string/SHORT_APP_NAME"
                android:theme="@android:style/Theme.NoTitleBar"
                android:screenOrientation="portrait"
                />

        <activity
                android:name="com.gametest.gametest123.activities.OfferPage"
                android:label="@string/SHORT_APP_NAME"
                android:theme="@android:style/Theme.NoTitleBar"
                android:screenOrientation="portrait"
                />

        <activity
            android:name="com.gametest.gametest123.discover.DiscoverApps"
            android:label="@string/TITLESTRING_WHATSNEW"
            android:screenOrientation="portrait"
            />

        <activity
            android:name="com.gametest.gametest123.activities.ChooseMailClient"
            android:theme="@android:style/Theme.NoTitleBar"
            android:screenOrientation="portrait"
            />

        <activity
                android:name="com.tapjoy.TJAdUnitActivity"
                android:configChanges="orientation|keyboardHidden|screenSize"
                android:hardwareAccelerated="true"
                android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen" />
        <activity
                android:name="com.tapjoy.mraid.view.ActionHandler"
                android:configChanges="orientation|keyboardHidden|screenSize" />
        <activity
                android:name="com.tapjoy.mraid.view.Browser"
                android:configChanges="orientation|keyboardHidden|screenSize" />
        <activity
                android:name="com.tapjoy.TJContentActivity"
                android:configChanges="orientation|keyboardHidden|screenSize"
                android:theme="@android:style/Theme.Translucent.NoTitleBar" />

        <meta-data android:name="com.google.android.gms.games.APP_ID"
                   android:value="@string/app_id" />

        <activity android:name="com.facebook.FacebookActivity"
                  android:configChanges=
                          "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
                  android:theme="@android:style/Theme.Translucent.NoTitleBar"
                  android:label="@string/SHORT_APP_NAME"
                  tools:replace="android:theme"/>

        <!-- TODO: Fix -->
                  <!--android:label="@string/app_name" /-->

        <activity android:name="com.fyber.ads.ofw.OfferWallActivity"
                  android:configChanges="orientation|screenSize" />


        <!-- The GAMES activity -->
        <activity
            android:name="com.gametest.gametest123.GamesActivity"
            android:label="@string/SHORT_APP_NAME"
            android:theme="@android:style/Theme.NoTitleBar"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>

        <provider
                android:authorities="com.facebook.app.FacebookContentProvider1730237540533882"
                android:name="com.facebook.FacebookContentProvider"
                android:exported="true"/>

        <!-- Optionally, register AnalyticsReceiver and AnalyticsService to support background
     dispatching on non-Google Play devices -->
        <receiver android:name="com.google.android.gms.analytics.AnalyticsReceiver"
                  android:enabled="true">
            <intent-filter>
                <action android:name="com.google.android.gms.analytics.ANALYTICS_DISPATCH" />
            </intent-filter>
        </receiver>
        <service android:name="com.google.android.gms.analytics.AnalyticsService"
                 android:enabled="true"
                 android:exported="false"/>

        <!-- Optionally, register CampaignTrackingReceiver and CampaignTrackingService to enable
             installation campaign reporting -->
        <receiver android:name="com.google.android.gms.analytics.CampaignTrackingReceiver"
                  android:exported="true">
            <intent-filter>
                <action android:name="com.android.vending.INSTALL_REFERRER" />
            </intent-filter>
        </receiver>
        <service android:name="com.google.android.gms.analytics.CampaignTrackingService" />
    </application>

</manifest>

我的应用程序:

package com.gametest.gametest123;

import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.support.multidex.MultiDex;
import android.support.multidex.MultiDexApplication;

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

public class MyApplication extends MultiDexApplication {
    private Tracker mTracker;

    private Activity mCurrentActivity = null;

    public void setCurrentActivity(Activity mCurrectActivity) {
        this.mCurrentActivity = mCurrectActivity;
    }

    public Activity getCurrentActivity() {
        return mCurrentActivity;
    }

    private static Context mAppContext;

    private static MyApplication mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        MultiDex.install(this);
        mInstance = this;
        this.setAppContext(getApplicationContext());
    }

    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }

    public static MyApplication getInstance() {
        return mInstance;
    }

    public static Context getAppContext() {
        return mAppContext;
    }

    public void setAppContext(Context mAppContext) {
        this.mAppContext = mAppContext;
    }

    /**
     * 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.string.ga_trackingId);
        }
        return mTracker;
    }
}

GamesActivity直到崩溃所在的行:

public class GamesActivity extends AndroidApplication implements DownloadAndParseJsonAppTask.DownloadAndParseJsonInterface, DialogInterface.OnCancelListener, PlayGames {

    private int mPresentNumber = 0;

    public ActionResolverAndroid actionResolverAndroid;
    public PlayGames mPlayGames;

    private boolean userIsWaitingForConnection = false;

    // Array to store all button elements initialized with 25 false elements (boolean is false by default, Boolean is null)
    private boolean[] mDoorsArray = new boolean[25];

    private DownloadAndParseJsonAppTask mTask;
    private Chartboost chartboost;

    // Loading data properties
    public ProgressDialog mLoadingDialog = null;
    public ArrayList<JsonData> mArrayJsonData;
    public String mLastModified = null;

    public Intent ofwIntent;
    public static final int REQUEST_CODE = 102;

    // Client used to interact with Google APIs
//    private GoogleApiClient mGoogleApiClient;
    GameHelper gameHelper;

    public boolean loadUrl = true;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getADID();


        AndroidPermissions.check(this)
                .permissions(Manifest.permission.READ_PHONE_STATE)
                .hasPermissions(new Checker.Action0() {
                    @Override
                    public void call(String[] permissions) {
                        // do something..
                    }
                })
                .noPermissions(new Checker.Action1() {
                    @Override
                    public void call(String[] permissions) {
                        // do something..
                        ActivityCompat.requestPermissions(GamesActivity.this
                                , new String[]{Manifest.permission.READ_PHONE_STATE}
                                , REQUEST_CODE);
                    }
                })
                .check();

        // Load Google Analytics

        //THIS IS WHERE THE APP CRASHES
        ((MyApplication) getApplication()).getDefaultTracker();

Answer 1

MyApplication.getInstance(). getDefaultTracker();