Question

我尝试了互联网上提供的所有解决方案，但无法解决此问题。请帮我解决这个例外。它不允许我在我的项目中添加任何Java类。

的build.gradle

 apply plugin: 'com.android.application'
 android {
compileSdkVersion 23
buildToolsVersion "23.0.3"

defaultConfig {
    applicationId "com.example.firza.map"
    minSdkVersion 18
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
}
dexOptions {
    javaMaxHeapSize "4g"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
   }
  }


   dependencies {
 compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.android.gms:play-services:10.0.1'
compile 'com.android.support:design:23.4.0'
 }

MapsActivity.java

  public class MapsActivity extends Fragment implements OnMapReadyCallback,View.OnClickListener {
private GoogleMap mMap;
MapView mapView;
Button btn_rest;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view =LayoutInflater.from(getActivity()).inflate(R.layout.activity_maps,null);
    mapView=(MapView) view.findViewById(R.id.map);
    mapView.onCreate(savedInstanceState);
    btn_rest=(Button) view.findViewById(R.id.btn_rest);
    btn_rest.setOnClickListener(this);
    return view;
}

@Override
public void onResume() {
    mapView.onResume();
    super.onResume();

}

@Override
public void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
}

@Override
public void onPause() {
    super.onPause();
    mapView.onPause();
}


@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    // Add a marker in Sydney and move the camera
    LatLng sydney = new LatLng(-34, 151);
    mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}


@Override
public void onClick(View v) {
    Log.i("okkkk","ojooooooo ");
}
}

异常

 02-12 19:04:56.737 23160-23160/com.example.firza.map E/AndroidRuntime: FATAL EXCEPTION: main
   Process: com.example.firza.map, PID: 23160
   java.lang.NoClassDefFoundError: com.google.firebase.FirebaseOptions

   at com.google.firebase.FirebaseApp.initializeApp(Unknown Source)
   at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
   at android.content.ContentProvider.attachInfo(ContentProvider.java:1656)
   at android.content.ContentProvider.attachInfo(ContentProvider.java:1627)
   at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
   at android.app.ActivityThread.installProvider(ActivityThread.java:5020)
   at android.app.ActivityThread.installContentProviders(ActivityThread.java:4594)
   at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4534)
   at android.app.ActivityThread.access$1600(ActivityThread.java:151)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
   at android.os.Handler.dispatchMessage(Handler.java:110)
   at android.os.Looper.loop(Looper.java:193)
   at android.app.ActivityThread.main(ActivityThread.java:5304)
   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:824)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
   at dalvik.system.NativeStart.main(Native Method)

Answer 1

请勿导入整个Google Play服务库，只导入您需要的依赖项。浏览此列表，找出您需要的内容。 https://developers.google.com/android/guides/setup#add_google_play_services_to_your_project 您需要在FirebaseOptions类所在的位置添加firebase依赖项。

compile "com.google.firebase:firebase-core:10.0.1"

导入完整依赖项不是一个好习惯，因为您可能达到最大方法计数（dex计数）。

Answer 2

您正在使用 GoogleMap ，然后最好拨打 play-services-maps ，而不是播放服务。< / p>

<强>唐＆＃39;吨

compile 'com.google.android.gms:play-services:10.0.1'

<强>不要

compile 'com.google.android.gms:play-services-maps:10.0.1' // or 9.8.0

Answer 3

您在build.gradle中缺少firebase依赖项。例如

compile "com.google.firebase:firebase-core:$PLAY_SERVICES_VERSION"
compile "com.google.firebase:firebase-database:$PLAY_SERVICES_VERSION"

Answer 4

根据此链接的firebase文档 https://firebase.google.com/docs/android/setup，您必须在模块Gradle文件中添加 Firebase SDK 依赖项和apply 插件行。

apply plugin: 'com.android.application'

android {
  // ...
}

dependencies {
  // ...
  compile 'com.google.firebase:firebase-core:10.0.1'

  // Getting a "Could not find" error? Make sure you have
  // the latest Google Repository in the Android SDK manager
}

// ADD THIS AT THE BOTTOM
apply plugin: 'com.google.gms.google-services'

如何解决java.lang.NoClassDefFoundError异常？

4 个答案: