Android DownloadManager Activity Sample

AndroidDownloadManagerActivity.java

package com.exercise.AndroidDownloadManager;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import android.app.Activity;
import com.exercise.download.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.Environment;
import android.os.ParcelFileDescriptor;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView; 
import android.widget.Toast;

import com.exercise.AndroidDownloadManager.R;

public class AndroidDownloadManagerActivity extends Activity {

	final String DOWNLOAD_FILE = "https://some_url";

	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);
		= new DownloadManager(getContentResolver(), "com.exercise.AndroidDownloadManager");
	
		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);
			request.setDestinationUri(Uri.fromFile(new File( Environment.getExternalStorageDirectory(),"100mb.test.test") ));
			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) {
			CheckDwnloadStatus();
			// 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();
					}

				}
			}
		}	
	};
	private void CheckDwnloadStatus(){

		// TODO Auto-generated method stub
		DownloadManager.Query query = new DownloadManager.Query();
		long id = preferenceManager.getLong(strPref_Download_ID, 0);
		query.setFilterById(id);
		Cursor cursor = downloadManager.query(query);
		if(cursor.moveToFirst()){
			int columnIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
			int status = cursor.getInt(columnIndex);
			int columnReason = cursor.getColumnIndex(DownloadManager.COLUMN_REASON);
			int reason = cursor.getInt(columnReason);

			switch(status){
				case DownloadManager.STATUS_FAILED:
				String failedReason = "";
				switch(reason){
					case DownloadManager.ERROR_CANNOT_RESUME:
					failedReason = "ERROR_CANNOT_RESUME";
					break;
					case DownloadManager.ERROR_DEVICE_NOT_FOUND:
					failedReason = "ERROR_DEVICE_NOT_FOUND";
					break;
					case DownloadManager.ERROR_FILE_ALREADY_EXISTS:
					failedReason = "ERROR_FILE_ALREADY_EXISTS";
					break;
					case DownloadManager.ERROR_FILE_ERROR:
					failedReason = "ERROR_FILE_ERROR";
					break;
					case DownloadManager.ERROR_HTTP_DATA_ERROR:
					failedReason = "ERROR_HTTP_DATA_ERROR";
					break;
					case DownloadManager.ERROR_INSUFFICIENT_SPACE:
					failedReason = "ERROR_INSUFFICIENT_SPACE";
					break;
					case DownloadManager.ERROR_TOO_MANY_REDIRECTS:
					failedReason = "ERROR_TOO_MANY_REDIRECTS";
					break;
					case DownloadManager.ERROR_UNHANDLED_HTTP_CODE:
					failedReason = "ERROR_UNHANDLED_HTTP_CODE";
					break;
					case DownloadManager.ERROR_UNKNOWN:
					failedReason = "ERROR_UNKNOWN";
					break;
				}

				Toast.makeText(AndroidDownloadManagerActivity.this,
					"FAILED: " + failedReason,
					Toast.LENGTH_LONG).show();
				break;
				case DownloadManager.STATUS_PAUSED:
				String pausedReason = "";

				switch(reason){
					case DownloadManager.PAUSED_QUEUED_FOR_WIFI:
					pausedReason = "PAUSED_QUEUED_FOR_WIFI";
					break;
					case DownloadManager.PAUSED_UNKNOWN:
					pausedReason = "PAUSED_UNKNOWN";
					break;
					case DownloadManager.PAUSED_WAITING_FOR_NETWORK:
					pausedReason = "PAUSED_WAITING_FOR_NETWORK";
					break;
					case DownloadManager.PAUSED_WAITING_TO_RETRY:
					pausedReason = "PAUSED_WAITING_TO_RETRY";
					break;
				}

				Toast.makeText(AndroidDownloadManagerActivity.this,
					"PAUSED: " + pausedReason,
					Toast.LENGTH_LONG).show();
				break;
				case DownloadManager.STATUS_PENDING:
				Toast.makeText(AndroidDownloadManagerActivity.this,
					"PENDING",
					Toast.LENGTH_LONG).show();
				break;
				case DownloadManager.STATUS_RUNNING:
				Toast.makeText(AndroidDownloadManagerActivity.this,
					"RUNNING",
					Toast.LENGTH_LONG).show();
				break;
				case DownloadManager.STATUS_SUCCESSFUL:

				Toast.makeText(AndroidDownloadManagerActivity.this,
					"SUCCESSFUL",
					Toast.LENGTH_LONG).show();
				//GetFile();
				break;
			}
		}
	}

}