In order to permit your app download from internet, AndroidManifest.xml have to be modified to grant permission of "android.permission.INTERNET".
Java code:
package com.exercise.AndroidDownloadManager;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import android.app.Activity;
import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class AndroidDownloadManagerActivity extends Activity {
final String DOWNLOAD_FILE = "http://goo.gl/w3XV3";
final String strPref_Download_ID = "PREF_DOWNLOAD_ID";
SharedPreferences preferenceManager;
DownloadManager downloadManager;
ImageView image;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
preferenceManager
= PreferenceManager.getDefaultSharedPreferences(this);
downloadManager
= (DownloadManager)getSystemService(DOWNLOAD_SERVICE);
Button btnStartDownload = (Button)findViewById(R.id.startdownload);
btnStartDownload.setOnClickListener(btnStartDownloadOnClickListener);
image = (ImageView)findViewById(R.id.image);
}
Button.OnClickListener btnStartDownloadOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Uri downloadUri = Uri.parse(DOWNLOAD_FILE);
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
long id = downloadManager.enqueue(request);
//Save the request id
Editor PrefEdit = preferenceManager.edit();
PrefEdit.putLong(strPref_Download_ID, id);
PrefEdit.commit();
}};
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
IntentFilter intentFilter
= new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
registerReceiver(downloadReceiver, intentFilter);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
unregisterReceiver(downloadReceiver);
}
private BroadcastReceiver downloadReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(preferenceManager.getLong(strPref_Download_ID, 0));
Cursor cursor = downloadManager.query(query);
if(cursor.moveToFirst()){
int columnIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
int status = cursor.getInt(columnIndex);
if(status == DownloadManager.STATUS_SUCCESSFUL){
//Retrieve the saved request id
long downloadID = preferenceManager.getLong(strPref_Download_ID, 0);
ParcelFileDescriptor file;
try {
file = downloadManager.openDownloadedFile(downloadID);
FileInputStream fileInputStream
= new ParcelFileDescriptor.AutoCloseInputStream(file);
Bitmap bm = BitmapFactory.decodeStream(fileInputStream);
image.setImageBitmap(bm);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
};
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/startdownload"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Start Download"
/>
<ImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>
Download the files.
6 comments:
Hi, i have some problems with the code above, DownloadManager.ACTION_DOWNLOAD_COMPLETE is not found... can you help me please? this is my mail : seifallah.azzabi@gmail.com
hello seifallah,
ACTION_DOWNLOAD_COMPLETE support API level 9 or higher.
hi could u tell me how to download a file in android using service
can Download Manager be used for transferring FILES and FOLDERS between android devices connected by a wifi network??
is it possible with network credentials?
I've been looking for a simple example forever.. THANKS!!!
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