Download Image or file from Server in Phone Storage(Download manager)

Hey, friends in this blog I will tell you how you can download Image or a big file in Android Studio.
In fetching of an image, you can Fetch with volley Network Image library, Picasso, Glide.
the are popular API to fetch images from Server but if I want to Download an image from Server, there is way more Complex method in Picasso to Download file.
To simplify it Android have already Download Manager.
By the help of Download manager, you can download any image or big file
So it's the best way to download an image from Server.

Official Doc-ClickHere

Steps Todo-

1. First of all, Take the Internet and Storage permission By adding below lines in Manifest file in Android.

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

view raw AndroidManifest.xml hosted with ❤ by GitHub

2. Now In activity_main.xml make a button In this button Click we will download Image from URL.

	<?xml version="1.0" encoding="utf-8"?>
	<android.support.constraint.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">
	<Button
	android:id="@+id/button"
	android:layout_width="0dp"
	android:layout_height="wrap_content"
	android:layout_marginStart="32dp"
	android:layout_marginTop="292dp"
	android:layout_marginEnd="32dp"
	android:onClick="imageDownload"
	android:text="Download"
	app:layout_constraintEnd_toEndOf="parent"
	app:layout_constraintHorizontal_bias="0.498"
	app:layout_constraintStart_toStartOf="parent"
	app:layout_constraintTop_toTopOf="parent" />
	</android.support.constraint.ConstraintLayout>

view raw activity_main.xml hosted with ❤ by GitHub

3. After Taking Permission For Internet and WRITE_EXTERNAL_STORAGE permission we have to take run time permission for WRITE_EXTERNAL_STORAGE. So you can write below code for run Time Permission.

	public class MainActivity extends AppCompatActivity {
	private static final String[] STORAGE_PERMISSIONS = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
	String uri="https://images.pexels.com/photos/67636/rose-blue-flower-rose-blooms-67636.jpeg?cs=srgb&dl=beauty-bloom-blue-67636.jpg&fm=jpg";
	int permissionExternalMemory;
	DownloadManager mgr;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_main);
	verifyPermissions();
	}
	private void verifyPermissions() {
	// This will return the current Status
	permissionExternalMemory = ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
	if(permissionExternalMemory != PackageManager.PERMISSION_GRANTED)
	{
	// If permission not granted then ask for permission real time.
	ActivityCompat.requestPermissions(MainActivity.this,STORAGE_PERMISSIONS,1);
	}
	}
	}

view raw MainActivity.java hosted with ❤ by GitHub

4. Now if permission is Granted I will try to download Image from Url otherwise I will prompt alert to give write storage permission Like Below.

	public void imageDownload(View view) {
	if(permissionExternalMemory == PackageManager.PERMISSION_GRANTED)
	{
	downloadFile(uri);
	}else{
	verifyPermissions();
	}
	}

view raw MainActivity.java hosted with ❤ by GitHub

5. Now make DownloadFile fn and pass Url to it Like below.

	public void downloadFile(String uRl) {
	File direct = new File(Environment.getExternalStorageDirectory()
	+ "/Test");
	if (!direct.exists()) {
	direct.mkdirs();
	}
	mgr = (DownloadManager) this.getSystemService(Context.DOWNLOAD_SERVICE);
	Uri downloadUri = Uri.parse(uRl);
	DownloadManager.Request request = new DownloadManager.Request(
	downloadUri);
	request.setAllowedNetworkTypes(
	DownloadManager.Request.NETWORK_WIFI
	| DownloadManager.Request.NETWORK_MOBILE)
	.setAllowedOverRoaming(false).setTitle("Test")
	.setDescription("Something useful. No, really.")
	.setDestinationInExternalPublicDir("/Test", "activity.jpg");
	mgr.enqueue(request);
	// Open Download Manager to view File progress
	Toast.makeText(this, "Downloading...",Toast.LENGTH_LONG).show();
	registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
	}
	BroadcastReceiver receiver = new BroadcastReceiver () {
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	if (action.equals(mgr.ACTION_DOWNLOAD_COMPLETE) ){
	Toast.makeText(MainActivity.this,"Successfully Downloaded",Toast.LENGTH_SHORT).show();
	unregisterReceiver(receiver);
	finishActivity(99);
	}
	}
	};

view raw MainActivity.java hosted with ❤ by GitHub

6. Now your final MainActivity.java file looks Like below.

	package com.example.downloadfile;
	import android.Manifest;
	import android.app.DownloadManager;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.pm.PackageManager;
	import android.net.Uri;
	import android.os.Environment;
	import android.support.v4.app.ActivityCompat;
	import android.support.v7.app.AppCompatActivity;
	import android.os.Bundle;
	import android.view.View;
	import android.widget.Toast;
	import java.io.File;
	public class MainActivity extends AppCompatActivity {
	private static final String[] STORAGE_PERMISSIONS = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
	String uri="https://images.pexels.com/photos/67636/rose-blue-flower-rose-blooms-67636.jpeg?cs=srgb&dl=beauty-bloom-blue-67636.jpg&fm=jpg";
	int permissionExternalMemory;
	DownloadManager mgr;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_main);
	verifyPermissions();
	}
	private void verifyPermissions() {
	// This will return the current Status
	permissionExternalMemory = ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
	if(permissionExternalMemory != PackageManager.PERMISSION_GRANTED)
	{
	// If permission not granted then ask for permission real time.
	ActivityCompat.requestPermissions(MainActivity.this,STORAGE_PERMISSIONS,1);
	}
	}
	public void imageDownload(View view) {
	if(permissionExternalMemory == PackageManager.PERMISSION_GRANTED)
	{
	downloadFile(uri);
	}else{
	verifyPermissions();
	}
	}
	public void downloadFile(String uRl) {
	File direct = new File(Environment.getExternalStorageDirectory()
	+ "/QualityKg");
	if (!direct.exists()) {
	direct.mkdirs();
	}
	mgr = (DownloadManager) this.getSystemService(Context.DOWNLOAD_SERVICE);
	Uri downloadUri = Uri.parse(uRl);
	DownloadManager.Request request = new DownloadManager.Request(
	downloadUri);
	request.setAllowedNetworkTypes(
	DownloadManager.Request.NETWORK_WIFI
	| DownloadManager.Request.NETWORK_MOBILE)
	.setAllowedOverRoaming(false).setTitle("Test")
	.setDescription("Something useful. No, really.")
	.setDestinationInExternalPublicDir("/Test", "activity.jpg");
	mgr.enqueue(request);
	// Open Download Manager to view File progress
	Toast.makeText(this, "Downloading...",Toast.LENGTH_LONG).show();
	registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
	}
	BroadcastReceiver receiver = new BroadcastReceiver () {
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	if (action.equals(mgr.ACTION_DOWNLOAD_COMPLETE) ){
	Toast.makeText(MainActivity.this,"Successfully Downloaded",Toast.LENGTH_SHORT).show();
	unregisterReceiver(receiver);
	finishActivity(99);
	}
	}
	};
	}

view raw MainActivity.java hosted with ❤ by GitHub

7.This type you can download any image or file from Server using URL with the help of
Download manager.
8. This is the DownloadManger function which is responsible for Download Image From Server-
                           Uri downloadUri = Uri.parse(uRl);

 DownloadManager.Request request = new DownloadManager.Request( downloadUri);

9. If you have any problem in this procedure you can Download Source Code from the below link.


                                   Download Code-ClickMe