Firebase Database tidak mengambil data dari Referensi Firebase Database

Question

Semuanya berfungsi dengan baik tetapi DatabaseReference tidak mengambil data, itu seperti mengabaikan kode saya untuk dijalankan dan seperti internet saya tidak berfungsi tolong bantu saya baru di sini di komunitas ini di bawah ini adalah kode dan gambar saya.

Sebelumnya itu berfungsi, tetapi karena saya baru saja mengubah beberapa kode untuk membuat hanya currentVersion> = vCode sehingga pengguna dapat melanjutkan meskipun nilai dalam database adalah <currentVersion tetapi, setelah membuatnya, aplikasi saya tidak mengambil data dari firebase dan saya mencoba untuk mencopotnya, dipasang lagi dari play store versi yang lebih lama itu juga tidak mengambil data tolong bantu. Saya tidak tahu kesalahan apa yang saya lakukan. Jadi saya berencana untuk menginstal ParrotOS jadi mungkin itu akan berhasil tetapi lebih baik bertanya terlebih dahulu dari ahlinya

gambar database firebase

MainActivity.java

public class MainActivity extends AppCompatActivity {
    TextView appName;
    FirebaseUser firebaseUser;
    String currentVersionName;
    long currentVersionCode;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        appName = findViewById(R.id.appName);
        currentVersionName = BuildConfig.VERSION_NAME;
        currentVersionCode = BuildConfig.VERSION_CODE;
        animateAppName();
        netConn();
        FirebaseAuth.getInstance();

    }

    public void applyScreenChange(){
        String sharedPerfId = "MyAppPref";
        SharedPreferences sharedPreferences = getSharedPreferences(sharedPerfId,0);
        boolean isAdvertiserLoggedIn = sharedPreferences.getBoolean("isAdvertiserLoggedIn",false);
        boolean isCreatorLoggedIn = sharedPreferences.getBoolean("isCreatorLoggedIn",false);
        if (isAdvertiserLoggedIn){
            skipSetupToAdvertiser();
        }
        else if (isCreatorLoggedIn){
            skipSetupToCreator();
        }
        else {
            newActivity();
        }
    }

    public void animateAppName(){
        appName.setTranslationY(-1000f);
        appName.animate().translationYBy(1000f).setDuration(500);
    }

    public void netConn(){
        ConnectivityManager connectivityManager = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
        assert connectivityManager != null;
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        if(networkInfo == null || !networkInfo.isConnected() || !networkInfo.isAvailable()){
            AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
            alertDialog.setTitle("No Internet Connection");
            alertDialog.setMessage("Connect to Network and Then try again");
            alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Exit", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    MainActivity.super.onBackPressed();
                }
            });
            alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Retry", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    netConn();
                }
            });
            alertDialog.setCanceledOnTouchOutside(false);
            alertDialog.show();

        }else {

//            Check older version

//            applyScreenChange();


            DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Version");
            databaseReference.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot snapshot) {
                    String vName = (String) snapshot.child("latestVersionName").getValue();
                    long vCode = (long) snapshot.child("latestVersionCode").getValue();
                    if (currentVersionName.equals(vName) && currentVersionCode >= vCode){
                        applyScreenChange();

                        // TODO: 16-08-2020 add condition to open app if version is higher
                    }else {
                        Toast.makeText(MainActivity.this, "Old Version", Toast.LENGTH_SHORT).show();
                        AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
                        alertDialog.setTitle("You're on Older Version");
                        alertDialog.setMessage("This Version is no more supported, Kindly update your App to Continue");
                        alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Exit", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                MainActivity.super.onBackPressed();
                            }
                        });
                        alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Update", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
//                                startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.app_link))));
                                Toast.makeText(MainActivity.this, "Kindly Search Sponso on PlayStore and Update", Toast.LENGTH_SHORT).show();
                                finish();
                            }
                        });
                        alertDialog.setCanceledOnTouchOutside(false);
                        alertDialog.show();
                    }
                }

                @Override
                public void onCancelled(@NonNull DatabaseError error) {

                }
            });
        }
    }

    public void newActivity(){
                Intent intent = new Intent(MainActivity.this, AdvertiserCreatorChooser.class);
                startActivity(intent);
                finish();
    }


    public void skipSetupToAdvertiser(){
        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        if (firebaseUser!=null) {
                    Intent intent = new Intent(MainActivity.this, AdvertiserHome.class);
                    startActivity(intent);
                    finish();
        }else{
                    Intent intent = new Intent(MainActivity.this, AdvertiserLoginRegister.class);
                    startActivity(intent);
                    finish();
        }
    }

    public void skipSetupToCreator(){
        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        if (firebaseUser!=null) {
                    Intent intent = new Intent(MainActivity.this, CreatorHome.class);
                    startActivity(intent);
                    finish();
        }else {
                    Intent intent = new Intent(MainActivity.this, CreatorLoginRegister.class);
                    startActivity(intent);
                    finish();
        }
    }
}

manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.webroose.sponso">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

    <application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:allowBackup="true"
        android:theme="@style/AppTheme">
        <activity android:name=".Advertiser.AdvertiserCampaignUpdate"/>
        <activity android:name=".Advertiser.ui.main.AdvertiserSettings" />
        <activity android:name=".Creator.CreatorRecentlyChat" />
        <activity android:name=".Advertiser.AdvertiserRecentlyChat" />
        <activity android:name=".Advertiser.AdvertiserChatActivity" />
        <activity android:name=".Creator.CreatorChatActivity" />

        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="@string/app_id" />

        <activity android:name=".Creator.CreatorUserDetails" />
        <activity android:name=".Creator.CreatorList" />
        <activity android:name=".Common.AboutUs" />
        <activity
            android:name=".AdvertiserHome"
            android:label="@string/title_activity_advertiser_home"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity
            android:name=".Advertiser.AdvertiserLoginRegister"
            android:label="@string/title_activity_advertiser_login_register"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity android:name=".Common.PrivacyPolicy" />
        <activity android:name=".Common.ChangePassword" />
        <activity android:name=".Creator.CreatorSettings" />
        <activity android:name=".Common.ChangeEmail" />
        <activity android:name=".Advertiser.AdvertiserUserDetails" />
        <activity android:name=".Advertiser.AdvertiserList" />
        <activity
            android:name=".CreatorHome"
            android:label="@string/title_activity_creator_home"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity
            android:name=".Creator.CreatorLoginRegister"
            android:label="@string/title_activity_creator_login_register"
            android:theme="@style/AppTheme.NoActionBar" />
        <activity android:name=".AdvertiserCreatorChooser" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="preloaded_fonts"
            android:resource="@array/preloaded_fonts" />
    </application>

</manifest>

ketergantungan

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
    implementation 'com.google.android.material:material:1.2.0'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
    implementation 'com.google.firebase:firebase-database:19.4.0'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'androidx.navigation:navigation-fragment:2.3.0'
    implementation 'androidx.navigation:navigation-ui:2.3.0'
    testImplementation 'junit:junit:4.13'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    implementation 'com.google.firebase:firebase-auth:19.3.2'
    implementation 'com.google.firebase:firebase-database:19.4.0'
    implementation 'com.firebaseui:firebase-ui-database:6.2.0'
    implementation 'com.google.android.gms:play-services-ads:19.3.0'
    implementation 'com.android.support:multidex:2.0.0'
    implementation 'com.google.firebase:firebase-analytics:17.5.0'
    implementation 'com.google.firebase:firebase-messaging:20.2.4'
    implementation 'com.facebook.android:audience-network-sdk:5.10.1'
}

Answer 1

Ubah
DatabaseReference databaseReference =FirebaseDatabase.getInstance().getReference("Version");
Ke
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("Version");

Answer 2

Dan masalah sebenarnya adalah dengan Firebase Database

Periksa gambar di bawah ini dengan database firebase