firebase databasereferenceは、私は、データベースの参照を取得することにより、firebaseデータベースにいくつかの情報を追加しようとしていますが、それは休閑エラーを与える何の仮想メソッドエラー

Question

を与えませんクラスLcom/google/firebase/FirebaseAppのクラス。またはそのスーパークラス（ 'com.google.firebase.FirebaseApp'の宣言は/data/app/com.bogroup.ucuncuprogram-1/split_lib_dependencies_apk.apk:classes25.dexに表示されます）

私のJavaコードは休止中です：

package com.bogroup.ucuncuprogram; 

import android.content.Context; 
import android.widget.Toast; 
import com.firebase.client.Firebase; 
import com.google.firebase.database.DatabaseReference; 
import com.google.firebase.database.FirebaseDatabase; 
import static com.facebook.FacebookSdk.getApplicationContext; 

public class database{ 

    private Firebase mRootRef; 
    private DatabaseReference mDatabase; 


    public void kullanicikontrol(String kullaniciadi){ 
     mDatabase = FirebaseDatabase.getInstance().getReference(); 
     mDatabase.child("users").child(kullaniciadi).setValue("9999999"); 
     //chieldref.setValue("9999999"); 

     Context context = getApplicationContext(); 
     CharSequence text = kullaniciadi; 
     int duration = Toast.LENGTH_LONG; 

     Toast toast = Toast.makeText(context, text, duration); 
     toast.show(); 
    } 
} 

事前に感謝の意を表します。

マイアプリのbuild.gradeは休閑のようなものです：FirebaseとFirebase UIの

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.3" 
    defaultConfig { 
     applicationId "com.bogroup.ucuncuprogram" 
     minSdkVersion 21 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    packagingOptions { 
     exclude 'META-INF/NOTICE' // will not include NOTICE file 
     exclude 'META-INF/LICENSE' // will not include LICENSE file 
     // as noted by @Vishnuvathsan you may also need to include 
     // variations on the file name. It depends on your dependencies. 
     // Some other common variations on notice and license file names 
     exclude 'META-INF/notice' 
     exclude 'META-INF/notice.txt' 
     exclude 'META-INF/license' 
     exclude 'META-INF/license.txt' 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:25.0.0' 
    compile 'com.android.support.constraint:constraint-layout:1.0.2' 
    compile 'com.google.firebase:firebase-core:9.4.0' 
    compile 'com.google.firebase:firebase-auth:9.4.0' 
    compile 'com.google.firebase:firebase-database:9.4.0' 
    compile 'com.google.firebase:firebase-crash:9.4.0' 
    compile 'com.firebase:firebase-client-android:2.2.4' 
    //compile 'com.google.firebase:firebase-storage:9.4.0' 
    compile 'com.firebaseui:firebase-ui:0.4.4' 
    compile 'com.google.android.gms:play-services-auth:9.4.0' 
    compile 'com.android.support:animated-vector-drawable:25.0.0' 
    compile 'com.android.support:design:25.0.0' 
    compile 'com.android.support:support-v4:25.0.0' 
    compile 'com.android.support:cardview-v7:25.0.0' 
    compile 'com.android.support:customtabs:25.0.0' 
    compile 'com.android.support:recyclerview-v7:25.0.0' 
    compile 'com.firebaseui:firebase-ui-auth:1.2.0' 
    compile 'com.squareup.picasso:picasso:2.5.2' 
    //compile 'com.android.support:customtabs:25.2.0' 
    testCompile 'junit:junit:4.12' 
} 
apply plugin: 'com.google.gms.google-services' 

Answer 1

あなたのバージョンでは、line up according to the table on their Github Pageする必要があります。

参考までに、アップグレードすることをお勧めします（私は強くお勧めします）。あなたが11.0.0にごfirebaseのGradleのバージョンをアップグレードしました。この

ext { 
    googlePlayVer = "10.2.0" 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:25.0.0' 
    compile 'com.android.support.constraint:constraint-layout:1.0.2' 

    // For example 
    compile "com.google.firebase:firebase-core:${googlePlayVer}" 
    compile "com.google.firebase:firebase-auth:${googlePlayVer}" 
    compile "com.google.firebase:firebase-database:${googlePlayVer}"