Question

在我第一次为该Utils类运行代码时，我仍然遇到java.lang.NoClassDefFoundError

public class FBase {

    public static String myUID = FirebaseAuth.getInstance().getCurrentUser().getUid();
    public static DatabaseReference dbUsersRef = FirebaseDatabase.getInstance().getReference("Users");
    public static DatabaseReference dbMessagesRef = FirebaseDatabase.getInstance().getReference("Messages");
    public static DatabaseReference dbNotificationsRef = FirebaseDatabase.getInstance().getReference("Notifications");
    public static DatabaseReference dbBlockRef = FirebaseDatabase.getInstance().getReference("Block");
    public static DatabaseReference dbUnReadMessagesRef = FirebaseDatabase.getInstance().getReference("posts");
    public static DatabaseReference dbLastMessagesRef = FirebaseDatabase.getInstance().getReference("LastMessages");
    public static StorageReference dbStorageReference =  FirebaseStorage.getInstance().getReference().child("Photos");

}

这是我上一堂课的代码

  FBase.dbUsersRef.orderByKey().equalTo(FBase.myUID).addListenerForSingleValueEvent(new ValueEventListener() {
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot data : dataSnapshot.getChildren()) {

                User model = data.getValue(User.class);
                name =model.getName();
                city =model.getCity();
                state = model.getState();
                country = model.getCountry();
        }

        @Override
        public void onCancelled(DatabaseError databaseError) { }
    });
}

我已经阅读了documentation来解决此错误，该错误建议添加

android {
defaultConfig {
    ...

    multiDexEnabled true
  }
  ...
 }
 dependencies {
     implementation 'com.android.support:multidex:1.0.3'
 }

并在扩展Application的类上覆盖此方法

class MyApp : Application() , LifecycleObserver  {
override fun attachBaseContext(base: Context) {
    super.attachBaseContext(base)
    MultiDex.install(this)
}
}

我还编辑了gradle.properties文件并更改了这一行

org.gradle.jvmargs=-Xmx1536m

到

org.gradle.jvmargs=-Xmx2048m -XX\:MaxHeapSize\=1024m

对不起，我在首次运行时从firebase解析数据时仍然出现此错误

我现在该怎么办？

为什么尽管multiDexEnabled却出现java.lang.NoClassDefFoundError？

0 个答案: