This video shows the steps to insert BLOB data (such as image, videos, etc.) in Firebase database from your Android App.
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Complete source code and other details:
package com.programmerworld.blobinfirebasedb;
import static android.Manifest.permission.READ_MEDIA_IMAGES;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.storage.StorageManager;
import android.os.storage.StorageVolume;
import android.view.View;
import android.widget.ImageView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
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 java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Base64;
public class MainActivity extends AppCompatActivity {
private ImageView imageView_initial, imageView_fromDB;
private DatabaseReference databaseReference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActivityCompat.requestPermissions(this,
new String[]{READ_MEDIA_IMAGES},
PackageManager.PERMISSION_GRANTED);
imageView_fromDB = findViewById(R.id.imageView_fromDB);
imageView_initial = findViewById(R.id.imageView_initial);
databaseReference = FirebaseDatabase.getInstance().getReference("BlobData");
}
public void buttonUploadDB(View view){
StorageManager storageManager = (StorageManager) getSystemService(STORAGE_SERVICE);
StorageVolume storageVolume = storageManager.getStorageVolumes().get(0); // 0 is for internal storage
Bitmap bitmap_initialImage = BitmapFactory.decodeFile(storageVolume.getDirectory().getPath() + "/Download/flower.jpg");
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap_initialImage.compress(Bitmap.CompressFormat.PNG, 0, byteArrayOutputStream);
byte[] bytesImage = byteArrayOutputStream.toByteArray();
String stringBytesImage = Base64.getEncoder().encodeToString(bytesImage);
databaseReference.child("Blob").child("Data").setValue(stringBytesImage);
imageView_initial.setImageBitmap(bitmap_initialImage);
}
public void buttonDownloadDB(View view){
databaseReference.child("Blob").addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot snapshot) {
if (snapshot!=null){
String stringBytesData = snapshot.child("Data").getValue().toString();
byte[] bytesImageReceived = Base64.getDecoder().decode(stringBytesData);
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytesImageReceived);
Bitmap bitmap_image_fromDB = BitmapFactory.decodeStream(byteArrayInputStream);
imageView_fromDB.setImageBitmap(bitmap_image_fromDB);
}
}
@Override
public void onCancelled(@NonNull DatabaseError error) {
}
});
}
}<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.BlobInFirebaseDb"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>plugins {
id("com.android.application")
id("com.google.gms.google-services")
}
android {
namespace = "com.programmerworld.blobinfirebasedb"
compileSdk = 34
defaultConfig {
applicationId = "com.programmerworld.blobinfirebasedb"
minSdk = 34
targetSdk = 34
versionCode = 1
versionName = "1.0"
testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
isMinifyEnabled = 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:1.6.1")
implementation("com.google.android.material:material:1.10.0")
implementation("androidx.constraintlayout:constraintlayout:2.1.4")
testImplementation("junit:junit:4.13.2")
androidTestImplementation("androidx.test.ext:junit:1.1.5")
androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
implementation(platform("com.google.firebase:firebase-bom:32.5.0"))
implementation("com.google.firebase:firebase-firestore")
implementation("com.google.firebase:firebase-database")
implementation("com.google.firebase:firebase-messaging")
}// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
id("com.android.application") version "8.1.3" apply false
id("com.google.gms.google-services") version "4.4.0" apply false
}<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ImageView
android:id="@+id/imageView_initial"
android:layout_width="344dp"
android:layout_height="189dp"
android:layout_marginStart="31dp"
android:layout_marginTop="44dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/ic_launcher_background" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="140dp"
android:layout_marginTop="60dp"
android:onClick="buttonUploadDB"
android:text="Upload to DB"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView_initial" />
<ImageView
android:id="@+id/imageView_fromDB"
android:layout_width="329dp"
android:layout_height="163dp"
android:layout_marginStart="33dp"
android:layout_marginTop="55dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button"
app:srcCompat="@drawable/ic_launcher_background" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="120dp"
android:layout_marginTop="44dp"
android:onClick="buttonDownloadDB"
android:text="Download from DB"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView_fromDB" />
</androidx.constraintlayout.widget.ConstraintLayout>
