Android Download Manager download from url Tutorial

To make your mobile application able to download from http url is majorly use for download mp3 music , images file and apk from websites. Android provide the DownloadManager Object to let android application to download all file from internet that can specific by the developers which can provide better experience to the user. The DownloadManager will conduct the installing process in the background of the application and it is take caring when the connection is failure or system reboots. The broadcastreceiver which can use to combine with download manager for notify downloaded file. In this tutorial, I will teach you how to use android download manager download from url and some other feature of download manager.

Create a New Project

1. Open Android Studio IDE in your computer.
2. Create a new project and Edit the Application name to “FileDownloadExample”.
(Optional) You can edit the company domain or select the suitable location for current project tutorial. Then click next button to proceed.
3. Select Minimum SDK (API 15:Android 4.0.3 (IceCreamSandwich). I choose the API 15 because many android devices currently are support more than API 15. Click Next button.
4. Choose “Empty Project” and Click Next button
5. Lastly, press finish button.

Add permissions

Open your AndroidManifest.xml file, adding the internet, read and write external permissions outside the application level so u can access those feature in the application.

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

Create a new xml item

Res> layout > right click > new > layout resource file and name the resource to down_load_task_item.xml. This layout is to show the downloaded item in the application.

Edit down_load_task_item.xml layout

Go to down_load_task_item and change your source code to the source code that i provided in the below section.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/downid"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/title"/>
     <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/status"/>
      <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/address"/>




</LinearLayout>

Edit activity_main.xml layout

After that, navigate to your activity_main.xml to edit the main page layout of your android application. It will have 4 basic buttons to perform different actions which are Download, Delete, Download with display progress and Display Downloaded file. The source code will be…

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btnDown"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Download" />
    <Button
        android:id="@+id/btnDelete"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Delete" />
    <Button
        android:id="@+id/btnDProgress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Download (display progress)" />

    <Button
        android:id="@+id/btndisplay"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Display All" />

    <ProgressBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/downProgress"
        style="?android:attr/progressBarStyleHorizontal"/>

    <ListView
        android:id="@+id/mylist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

Create a Broadcastreceiver

Java > right click your package name and create a new java class and name it to DownloadCompleteReceiver after that copy and paste the following source code below.

import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

/**
 * Created by HP on 16/9/2016.
 */
class DownLoadCompleteReceiver extends BroadcastReceiver {
    private MainActivity mainActivity;

    public DownLoadCompleteReceiver(MainActivity mainActivity) {
        this.mainActivity = mainActivity;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(DownloadManager.ACTION_DOWNLOAD_COMPLETE)) {
            long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
            Toast.makeText(mainActivity, "Completed", Toast.LENGTH_SHORT).show();
        } else if (intent.getAction().equals(DownloadManager.ACTION_NOTIFICATION_CLICKED)) {
            Toast.makeText(mainActivity, "Clicked", Toast.LENGTH_SHORT).show();
        }
    }
}
<br>

Edit MainActivity.java class

Navigate to your mainActivity.java class and paste the following source code. In this application will download the mp3 file from the url.

package com.questdot.filedownloadexample;

import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class MainActivity extends AppCompatActivity  implements View.OnClickListener {

    long id;
    long idPro;
    private ProgressBar progressBar;
    private ListView mlistView;
    private SimpleAdapter adapter;
    private List<Map<String, String>> data ;
    DownloadManager downManager ;
    private DownLoadCompleteReceiver receiver;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.btnDown).setOnClickListener(this);
        findViewById(R.id.btndisplay).setOnClickListener(this);
        findViewById(R.id.btnDelete).setOnClickListener(this);
        findViewById(R.id.btnDProgress).setOnClickListener(this);

        mlistView = (ListView)findViewById(R.id.mylist);

        downManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
        progressBar = (ProgressBar) (findViewById(R.id.downProgress));

        data = new ArrayList<Map<String,String>>();
        adapter = new SimpleAdapter(this, data,
                R.layout.down_load_task_item,
                new String[]{"downid","title","address","status"},
                new int[]{R.id.downid,R.id.title,R.id.address,R.id.status});

        mlistView.setAdapter(adapter);

        mlistView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                Map<String, String> map = data.get(position);



                downManager.remove(Long.valueOf(map.get("downid")));
                //adapter.notifyDataSetChanged();
            }
        });

        IntentFilter filter = new IntentFilter();
        filter.addAction(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
        filter.addAction(DownloadManager.ACTION_NOTIFICATION_CLICKED);
        receiver = new DownLoadCompleteReceiver(this);
        registerReceiver(receiver, filter);
    }

    @Override
    public void onClick(View v) {
        DownloadManager.Request request =
                new DownloadManager.Request(Uri.parse("http://www.stephaniequinn.com/Music/Allegro%20from%20Duet%20in%20C%20Major.mp3"));

        request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI);

        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);
        request.setTitle("Download");
        request.setDescription("Your file is downloading...");
        request.setAllowedOverRoaming(false);

        request.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, "mydown");
        switch (v.getId()) {
            case R.id.btnDown:

                id= downManager.enqueue(request);
                break;

            case R.id.btndisplay:
                data.clear();
                queryDownTask(downManager,DownloadManager.STATUS_FAILED);
                queryDownTask(downManager,DownloadManager.STATUS_PAUSED);
                queryDownTask(downManager,DownloadManager.STATUS_PENDING);
                queryDownTask(downManager,DownloadManager.STATUS_RUNNING);
                queryDownTask(downManager,DownloadManager.STATUS_SUCCESSFUL);
                adapter.notifyDataSetChanged();
                break;
            case R.id.btnDelete:
                downManager.remove(id);

                break;
            case R.id.btnDProgress:
                idPro= downManager.enqueue(request);

                ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor();
                ses.scheduleAtFixedRate(new Runnable() {
                    @Override
                    public void run() {
                        queryTaskByIdandUpdateView(idPro);
                    }
                }, 0, 2, TimeUnit.SECONDS);
                break;
            default:
                break;
        }
    }

    private void queryDownTask(DownloadManager downManager,int status) {
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterByStatus(status);
        Cursor cursor= downManager.query(query);

        while(cursor.moveToNext()){
            String downId= cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_ID));
            String title = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TITLE));
            String address = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
            //String statuss = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            String size= cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
            String sizeTotal = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
            Map<String, String> map = new HashMap<String, String>();
            map.put("downid", downId);
            map.put("title", title);
            map.put("address", address);
            map.put("status", sizeTotal+":"+size);
            this.data.add(map);
        }
        cursor.close();
    }

    private void queryTaskByIdandUpdateView(long id){
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(id);
        Cursor cursor= downManager.query(query);
        String size="0";
        String sizeTotal="0";
        if(cursor.moveToNext()){
            size= cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
            sizeTotal = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
        }
        cursor.close();
        progressBar.setMax(Integer.valueOf(sizeTotal));
        progressBar.setProgress(Integer.valueOf(size));

    }



    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        unregisterReceiver(receiver);

        // Intent intent = new Intent(Intent.ACTION_VIEW);
        //   intent.setDataAndType(Uri.fromFile(new File(mUrl)),
        //           "application/vnd.android.package-archive");
    }




}

Run your project

Finally, you can run it and download file from the url, you also can check what you are download in your application.

(Android Download Manager download from url)

Source Code

(Visited 1,883 times, 1 visits today)
Advertisements

Yong Loon Ng

Ng Yong Loon, better known as Kristofer is a software engineer and computer scientist who doubles up as an entrepreneur.

You may also like...

Leave a Reply

Your email address will not be published. Required fields are marked *