Java tutorial
/*** Copyright (c) 2008-2012 CommonsWare, LLC Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. From _The Busy Coder's Guide to Android Development_ http://commonsware.com/Android */ package com.commonsware.android.downloader; import android.app.IntentService; import android.content.Intent; import android.os.Environment; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; public class Downloader extends IntentService { public static final String ACTION_COMPLETE = "com.commonsware.android.downloader.action.COMPLETE"; public Downloader() { super("Downloader"); } @Override public void onHandleIntent(Intent i) { try { File root = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS); root.mkdirs(); File output = new File(root, i.getData().getLastPathSegment()); if (output.exists()) { output.delete(); } URL url = new URL(i.getData().toString()); HttpURLConnection c = (HttpURLConnection) url.openConnection(); FileOutputStream fos = new FileOutputStream(output.getPath()); BufferedOutputStream out = new BufferedOutputStream(fos); try { InputStream in = c.getInputStream(); byte[] buffer = new byte[8192]; int len = 0; while ((len = in.read(buffer)) >= 0) { out.write(buffer, 0, len); } out.flush(); } finally { fos.getFD().sync(); out.close(); c.disconnect(); } LocalBroadcastManager.getInstance(this).sendBroadcast(new Intent(ACTION_COMPLETE)); } catch (IOException e2) { Log.e(getClass().getName(), "Exception in download", e2); } } }