How to view and download an image file from a URL using DownloadManager in your Android App?

In this video it shows how one can use download manager to download an image file (or any other file type) from internet using the URL.

It also shows how to use input stream from the URL to create the respective Bitmap from the image and then display it on an imageView widget of the App’s layout.

The sample image file used in this demo is available at: https://i0.wp.com/programmerworld.co/wp-content/uploads/2023/05/flower.png

I hope you like this video. For any questions, suggestions or appreciation please contact us at: https://programmerworld.co/contact/ or email at: programmerworld1990@gmail.com

Complete source code and other details:

package com.programmerworld.downloadimagefromurl;

import android.app.DownloadManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import java.io.InputStream;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    private TextView textView;
    private ImageView imageView;
    private String stringURL = "https://i0.wp.com/programmerworld.co/wp-content/uploads/2023/05/flower.png";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = findViewById(R.id.textView);
        imageView = findViewById(R.id.imageView);

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }

    public void buttonDownload(View view){

        DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

        Uri uri = Uri.parse(stringURL);
        DownloadManager.Request request = new DownloadManager.Request(uri);

        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,"ImageFileDownloaded2.png");
        downloadManager.enqueue(request);

        textView.setText("Download Success");
    }

    public void buttonView(View view){
        try {
            InputStream inputStream = (InputStream) new URL(stringURL).getContent();
            Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
            imageView.setImageBitmap(bitmap);
            textView.setText("Image View Success");
        } catch (Exception e) {
            textView.setText("Exception: " + e.toString());
        }
    }
}

<?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"/>

    <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.DownloadImageFromURL"
        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>

<?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"
        android:layout_width="273dp"
        android:layout_height="259dp"
        android:layout_marginStart="68dp"
        android:layout_marginTop="184dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button"
        app:srcCompat="@drawable/ic_launcher_background" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="48dp"
        android:layout_marginTop="86dp"
        android:onClick="buttonView"
        android:text="ViewImage"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="44dp"
        android:layout_marginTop="90dp"
        android:onClick="buttonDownload"
        android:text="DownloadImage"
        app:layout_constraintStart_toEndOf="@+id/button"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="145dp"
        android:layout_height="76dp"
        android:layout_marginStart="124dp"
        android:layout_marginTop="188dp"
        android:text="Status"
        android:textAlignment="center"
        android:textSize="24sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Screenshots: