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Android example source code file (BitmapUtils.java)
The BitmapUtils.java Android example source code/* * Copyright (C) 2008 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 com.google.android.panoramio; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.util.Log; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayOutputStream; import java.io.Closeable; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; /** * Utilities for loading a bitmap from a URL * */ public class BitmapUtils { private static final String TAG = "Panoramio"; private static final int IO_BUFFER_SIZE = 4 * 1024; /** * Loads a bitmap from the specified url. This can take a while, so it should not * be called from the UI thread. * * @param url The location of the bitmap asset * * @return The bitmap, or null if it could not be loaded */ public static Bitmap loadBitmap(String url) { Bitmap bitmap = null; InputStream in = null; BufferedOutputStream out = null; try { in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE); final ByteArrayOutputStream dataStream = new ByteArrayOutputStream(); out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE); copy(in, out); out.flush(); final byte[] data = dataStream.toByteArray(); bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); } catch (IOException e) { Log.e(TAG, "Could not load Bitmap from: " + url); } finally { closeStream(in); closeStream(out); } return bitmap; } /** * Closes the specified stream. * * @param stream The stream to close. */ private static void closeStream(Closeable stream) { if (stream != null) { try { stream.close(); } catch (IOException e) { android.util.Log.e(TAG, "Could not close stream", e); } } } /** * Copy the content of the input stream into the output stream, using a * temporary byte array buffer whose size is defined by * {@link #IO_BUFFER_SIZE}. * * @param in The input stream to copy from. * @param out The output stream to copy to. * @throws IOException If any error occurs during the copy. */ private static void copy(InputStream in, OutputStream out) throws IOException { byte[] b = new byte[IO_BUFFER_SIZE]; int read; while ((read = in.read(b)) != -1) { out.write(b, 0, read); } } } Other Android examples (source code examples)Here is a short list of links related to this Android BitmapUtils.java source code file: |
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