How to make any file downloader in Android ~ Android Lad Ohm

Many time developer has to download big file from server and for that he/she has to write downloader class .
In that case developer has to save file in sdcard manually using FileOutputStream and OutputStreamWriter and manage network on/off case .It takes lot of efforts and time . I would suggest to use DownloadManager to overcome these efforts.

Download sourcecode .

Why should we use DownloadManager service
-DownloadManager is simple to use and handle
-It takes only 5 min to configure to your existing code.
-We can download multiple files concurrently.
-Wifi on/off automatically managed no need extra efforts to handle this.
-You can pause , resume and restart file downloading .

@ Use this line of code to download video file.
@ Just manage refrenceId to manage file downloading .
-refrenceId is a file downloading id ,with this id we can cancel, pause, resume , file path of downloading file.

DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

Request request = new Request(

Uri.parse("http://sample-videos.com/video/mp4/720/big_buck_bunny_720p_10mb.mp4"));

//Uri.parse("http://techslides.com/demos/sample-videos/small.mp4"));

long enqueue = dm.enqueue(request);

1: To implements in Activity just create file MainActivity.java and copy past this .
this will create some error no need to worry just press ctrl+1 (eclipce user ) or alt+enter (android studio user) all error will remove. to use ActionBarActivity just add actioncompat lib sourcecode

import android.support.v7.app.ActionBarActivity;

import android.app.DownloadManager;

import android.app.DownloadManager.Request;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends ActionBarActivity {

private DownloadManager dm;

private long enqueue;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button download =(Button)findViewById(R.id.download);

Button check =(Button)findViewById(R.id.check);

download.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

Request request = new Request(

Uri.parse("http://sample-videos.com/video/mp4/720/big_buck_bunny_720p_10mb.mp4"));

//Uri.parse("http://techslides.com/demos/sample-videos/small.mp4"));

enqueue = dm.enqueue(request);

}

});

check.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent i = new Intent();

i.setAction(DownloadManager.ACTION_VIEW_DOWNLOADS);

startActivity(i);

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button, so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

2: To receive download complete response just create BroadcastReceiver class

DownloadCompleteOrClickReceive.java

import android.app.Activity;

import android.app.DownloadManager;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.database.Cursor;

public class DownloadCompleteOrClickReceive extends BroadcastReceiver{

@Override

public void onReceive(Context arg0, Intent intent) {

String action = intent.getAction();

DownloadManager dm = (DownloadManager)arg0. getSystemService(Activity.DOWNLOAD_SERVICE);

if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)||DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(action)) {

long downloadId = intent.getLongExtra(

DownloadManager.EXTRA_DOWNLOAD_ID, 0);

DownloadManager.Query query = new DownloadManager.Query();

query.setFilterById(downloadId);

Cursor c = dm.query(query);

if (c.moveToFirst()) {

int columnIndex = c

.getColumnIndex(DownloadManager.COLUMN_STATUS);

if (DownloadManager.STATUS_SUCCESSFUL == c

.getInt(columnIndex)) {

String uriString = c

.getString(c

.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));

}else if (DownloadManager.STATUS_RUNNING == c

.getInt(columnIndex)) {

Intent i = new Intent();

i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

i.setAction(DownloadManager.ACTION_VIEW_DOWNLOADS);

arg0.startActivity(i);

}

3: Add permission to AndroidManifest.xml:

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

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

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

4: register BroadcastReceiver to AndroidManifest.xml and add
IntentFilter "android.intent.action.DOWNLOAD_COMPLETE" and
"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"
like below in <receiver > tag .

<intent-filter>

</intent-filter></receiver>

5: How AndroidManifest.xml looks after writing download all required fields .

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.downloadmangerexample"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="9"

android:targetSdkVersion="21" />

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

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

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name=".MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

<intent-filter>

</intent-filter></receiver>

</application>

</manifest>

6: To use styles.xml to your project value folder to use ActionCompat library.

<!--

Base application theme, dependent on API level. This theme is replaced

by AppBaseTheme from res/values-vXX/styles.xml on newer devices.

-->

<!--

Theme customizations available in newer API levels can go in

res/values-vXX/styles.xml, while customizations related to

backward-compatibility can go here.

-->

</style>

</style>

</resources>

Download sourcecode .

Android Lad Ohm

How to make any file downloader in Android

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