title: Firebase app crashes with "unfortunately stopped"
body: <p>I tried about 100 times to solve this problem but still the same error:</p>
  
  <blockquote>
    <p>unfortunately stopped</p>
  </blockquote>
  
  <p>Here are my deps:</p>
  
  <pre><code>dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.4.0'
      compile 'com.android.support:design:23.4.0'
      compile 'com.firebase:firebase-client-android:2.5.0'
  }
  apply plugin: 'com.google.gms.google-services'
  dependencies {
      classpath 'com.android.tools.build:gradle:2.1.0'
      classpath 'com.google.gms:google-services:3.0.0'
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>public class MainActivity extends AppCompatActivity {
  TextView textView;
  Firebase rootRef =  new Firebase("https://fir-3-e5ce7.firebaseio.com/condition");
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
  
  
      Firebase.setAndroidContext(this);
      Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
      setSupportActionBar(toolbar);
  
  
  
      FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
      fab.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                      .setAction("Action", null).show();
          }
      });
  
      textView = (TextView)findViewById(R.id.firebasedata);
  
      rootRef.child("message").addValueEventListener(new ValueEventListener() {
  
          @Override
          public void onDataChange(DataSnapshot snapshot) {
             String superr = (String) snapshot.getValue();
              textView.setText(superr);
  
          }
  
          @Override public void onCancelled(FirebaseError error) { }
      });
  }
  </code></pre>
  
  <p>JSON file is also downloaded and placed in src folder. Internet permission is added also.</p>
  
  <p>Google services and Repository is Version 31. Android Studio 2.1</p>
  
  <p>So what is the problem?</p>