Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.
 */

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.text.TextUtils;
import android.util.Log;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class Main {
    /** The tag used to log to adb console. */
    private static final String TAG = "NetworkUtilities";

    /**
     * Download the avatar image from the server.
     *
     * @param avatarUrl the URL pointing to the avatar image
     * @return a byte array with the raw JPEG avatar image
     */
    public static byte[] downloadAvatar(final String avatarUrl) {
        // If there is no avatar, we're done
        if (TextUtils.isEmpty(avatarUrl)) {
            return null;
        }

        try {
            Log.i(TAG, "Downloading avatar: " + avatarUrl);
            // Request the avatar image from the server, and create a bitmap
            // object from the stream we get back.
            URL url = new URL(avatarUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.connect();
            try {
                final BitmapFactory.Options options = new BitmapFactory.Options();
                final Bitmap avatar = BitmapFactory.decodeStream(connection.getInputStream(), null, options);

                // Take the image we received from the server, whatever format it
                // happens to be in, and convert it to a JPEG image. Note: we're
                // not resizing the avatar - we assume that the image we get from
                // the server is a reasonable size...
                Log.i(TAG, "Converting avatar to JPEG");
                ByteArrayOutputStream convertStream = new ByteArrayOutputStream(
                        avatar.getWidth() * avatar.getHeight() * 4);
                avatar.compress(Bitmap.CompressFormat.JPEG, 95, convertStream);
                convertStream.flush();
                convertStream.close();
                // On pre-Honeycomb systems, it's important to call recycle on bitmaps
                avatar.recycle();
                return convertStream.toByteArray();
            } finally {
                connection.disconnect();
            }
        } catch (MalformedURLException muex) {
            // A bad URL - nothing we can really do about it here...
            Log.e(TAG, "Malformed avatar URL: " + avatarUrl);
        } catch (IOException ioex) {
            // If we're unable to download the avatar, it's a bummer but not the
            // end of the world. We'll try to get it next time we sync.
            Log.e(TAG, "Failed to download user avatar: " + avatarUrl);
        }
        return null;
    }
}