Java tutorial
/* * Copyright 2010 Google Inc. * * 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. */ package org.nhnnext.android.day3; import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import org.apache.http.util.ByteArrayBuffer; import android.content.Context; public class Img_Downloader { private final Context context; // ? ? ? public Img_Downloader(Context context) { this.context = context; } public void copy_img(String url, String save_name) { File img_cache_path; img_cache_path = new File(MainActivity.FILES_DIR + save_name); if (!img_cache_path.exists()) { // ************************************ try { URL Url = new URL(url); URLConnection conn = Url.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); BufferedInputStream bis = new BufferedInputStream(is); ByteArrayBuffer baf = new ByteArrayBuffer(50); int current = 0; while ((current = bis.read()) != -1) { baf.append((byte) current); } FileOutputStream fos = context.openFileOutput(save_name, 0); fos.write(baf.toByteArray()); fos.close(); } catch (IOException e) { } } } }