[英]No virtual method zzbqo()Z in class Lcom/google/firebase/FirebaseApp; or its super classes
[英]java.lang.NoSuchMethodError: No virtual method zzbqo()Z in class Lcom/google/firebase/FirebaseApp; or its super classes
java.lang.NoSuchMethodError:類Lcom / google / firebase / FirebaseApp中沒有虛擬方法zzbqo()Z; 或其超級類(在/data/app/woolamania.in.woolamania-2/base.apk中顯示“ com.google.firebase.FirebaseApp”的聲明),位於com.google.firebase.database.FirebaseDatabase.getInstance(未知源) ),位於com.google.firebase.database.FirebaseDatabase.getInstance(未知源),位於wooramania.in.woolamania.Home.onCreate(Home.java:32),位於android.app.Activity.performCreate(Activity.java:6093)
Home.java類的代碼是-
公共類Home擴展AppCompatActivity實現View.OnClickListener {
TextView points;
Button freeRoll,lottery;
DatabaseReference mdatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Firebase.setAndroidContext(this);
mdatabase= FirebaseDatabase.getInstance().getReference("User");
Query query= mdatabase
.orderByChild("email")
.equalTo("aroravishal8991@gmail.com");
query.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(!dataSnapshot.exists()){
Toast.makeText(getApplicationContext(),"in first if and dsnap dont exist",Toast.LENGTH_SHORT).show();
}
for(DataSnapshot singleSnapshot: dataSnapshot.getChildren()){
if(singleSnapshot.exists()){
Toast.makeText(getApplicationContext(),"already exists",Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
請確保已在依賴項中編寫了此代碼:
dependencies {
// ...
implementation 'com.google.firebase:firebase-core:16.0.4'
// for real-time database
implementation com.google.firebase:firebase-database:16.0.3
}
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