问我通过MDX工具打包的APK使FireBase getInstance崩溃

EN

Caused by: java.lang.NullPointerException: Attempt to read from field 'java.lang.String android.content.pm.PackageItemInfo.name' on a null object reference
 at com.citrix.mdx.f.a.a(Unknown Source)
 at com.citrix.mdx.f.a.a(Unknown Source)
 at com.citrix.MAM.Android.ManagedApp.l.a(Unknown Source)
 at com.citrix.MAM.Android.ManagedApp.l.a(Unknown Source)
 at com.citrix.MAM.Android.ManagedApp.l.invoke(Unknown Source)
 at com.citrix.mdx.e.d.b(Unknown Source)
 at citrix.android.content.pm.PackageManager.queryIntentServices_aroundBody5$advice(Unknown Source)
 at citrix.android.content.pm.PackageManager.queryIntentServices(Unknown Source)
 at com.google.firebase.iid.zzl.zzdf(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceIdService.zzem(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceIdService.zza(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.<init>(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
 at citrix.android.content.pm.PackageManager.queryIntentServices_aroundBody5$advice(Unknown Source)
 at citrix.android.content.pm.PackageManager.queryIntentServices(Unknown Source)
 at com.google.firebase.iid.zzl.zzdf(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceIdService.zzem(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceIdService.zza(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.<init>(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
 at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)

  case R.id.register_btn:
            if (validateInput()) {
                showProgress("Loading...");
                String android_id = Settings.Secure.getString(this.getContentResolver(),
                        Settings.Secure.ANDROID_ID);
        //here is where am getting null pointer exception only with wrapped apk 
                     final String firebaseId = FirebaseInstanceId.getInstance().getToken();
                String myVersion = android.os.Build.VERSION.RELEASE;

                final LoginData signUpData = new LoginData(userId_et.getText().toString().trim(), password_et.getText().toString(), "ANDROID " + myVersion, phone_et.getText().toString(), firebaseId);
                apiService.userLogin(signUpData).enqueue(new Callback<LoginResult>() {
                    @Override
                    public void onResponse(Call<LoginResult> call, Response<LoginResult> response) {
                        dismissProgress();
  }

dependencies {

compile 'com.google.android.gms:play-services:11.4.2'

compile 'com.google.firebase:firebase-messaging:11.4.2'
compile 'com.google.firebase:firebase-crash:11.4.2'
}
apply plugin: 'com.google.gms.google-services'      

 dependencies {
    classpath 'com.android.tools.build:gradle:3.0.1'
    classpath 'com.google.gms:google-services:3.1.0'
    classpath 'com.google.firebase:firebase-plugins:1.1.1'
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}   

        <!-- [START firebase_service] -->
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />
    <service
        android:name=".service.MyFirebaseMessagingService"
        android:enabled="true"
        android:exported="true">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
    </service>

    <receiver
        android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver"
        android:exported="true"
        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.fc.debug" />
        </intent-filter>
    </receiver>
    <!-- [END firebase_service] -->
    <!-- [START firebase_iid_service] -->
    <service android:name=".service.MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
        </intent-filter>
    </service>

    <!-- [END firebase_iid_service] -->

      public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

private static final String TAG = "MyFirebaseIIDService";

/**
 * Called if InstanceID token is updated. This may occur if the security of
 * the previous token had been compromised. Note that this is called when the InstanceID token
 * is initially generated so this is where you would retrieve the token.
 */
// [START refresh_token]
@Override
public void onTokenRefresh() {
    // Get updated InstanceID token.
         //        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
    String refreshedToken = " ";
    Log.d(TAG, "Refreshed token: " + refreshedToken);

    // If you want to send messages to this application instance or
    // manage this apps subscriptions on the server side, send the
    // Instance ID token to your app server.
    sendRegistrationToServer(refreshedToken);
}
// [END refresh_token]

/**
 * Persist token to third-party servers.
 * <p>
 * Modify this method to associate the user's FCM InstanceID token with any server-side account
 * maintained by your application.
 *
 * @param token The new token.
 */
private void sendRegistrationToServer(String token) {
    // TODO: Implement this method to send token to your app server.
}
}

public class MyApplication extends MultiDexApplication {

@Override
protected void attachBaseContext(Context base) {
    super.attachBaseContext(base);
    MultiDex.install(this);
}
@Override
public void onCreate() {
    super.onCreate();
    FirebaseApp.initializeApp(this);

}
}