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 .
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 .
<receiver android:name="com.example.downloadmangerexample.DownloadCompleteOrClickReceive">
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED" />
<action android:name="android.intent.action.DOWNLOAD_COMPLETE"></action>
</intent-filter></receiver>
5: How AndroidManifest.xml looks after writing download all required fields .
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>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="com.example.downloadmangerexample.DownloadCompleteOrClickReceive">
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED" />
<action android:name="android.intent.action.DOWNLOAD_COMPLETE"></action>
</intent-filter></receiver>
</application>
</manifest>
6: To use styles.xml to your project value folder to use ActionCompat library.
<resources>
<!--
Base application theme, dependent on API level. This theme is replaced
by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
-->
<style name="AppBaseTheme" parent="Theme.AppCompat.Light">
<!--
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>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>
</resources>
