I am facing this issue and seen some answers on this site but did not get any proper solution. I have used previous version of Firebase which works fine but when I try to upgrade using Upgradation and update Firebase class to DatabaseReference it shows error and not working.
My Module app is given below:
plugins {
id 'com.android.application'
}
android {
compileSdkVersion 30
buildToolsVersion '30.0.2'
defaultConfig {
applicationId "com.example.lasthope"
minSdkVersion 28
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
implementation 'org.jetbrains:annotations:15.0'
testImplementation 'junit:junit:4. '
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
//
implementation 'com.google.firebase:firebase-analytics:17.2.1'
implementation 'com.google.firebase:firebase-database:19.2.0'
}
and Project gradle is
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
mavenCentral()
}
dependencies {
classpath "com.android.tools.build:gradle:4.2.2"
classpath 'com.google.gms:google-services:4.3.10'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
mavenCentral()
jcenter() // Warning: this repository is going to shut down soon
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
Below is my Activity
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.google.firebase.FirebaseApp;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ListView listview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FirebaseApp.initializeApp(this);
setContentView(R.layout.activity_main);
listview=findViewById(R.id.listview);
ArrayList<String>list = new ArrayList<>();
ArrayAdapter adapter = new ArrayAdapter<String>(this,R.layout.activity_main,list);
listview.setAdapter(adapter);
DatabaseReference reference = FirebaseDatabase.getInstance().getReference().child("items");
reference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull @NotNull DataSnapshot dataSnapshot) {
list.clear();
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
list.add(snapshot.getValue().toString());
}
adapter.notifyDataSetChanged();
}
@Override
public void onCancelled(@NonNull @NotNull DatabaseError databaseError) {
}
});
}
}
CodePudding user response:
To sllve this, please chenche the folllwing lines of code:
implementation 'com.google.firebase:firebase-analytics:17.2.1'
implementation 'com.google.firebase:firebase-database:19.2.0'
To:
implementation platform("com.google.firebase:firebase-bom:28.4.1")
implementation "com.google.firebase:firebase-analytics"
implementation "com.google.firebase:firebase-database"
There is no need to specify any versions for the Analytics, nor for the Realtime Database. More information:
Besides that, there is no need to call initializeApp()
. If you perform a standard integration, Firebase will be initialized automatically at the app start. Please see more about this in the API docs for FirebaseApp.
Edit:
Don't also forget to add:
plugins {
id 'com.android.application'
id 'com.google.gms.google-services' //Newly added
}
At the top of your Gradle file.