Java tutorial
/* * Copyright (c) 2012 Socialize Inc. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.socialize.util; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.net.Uri; import android.provider.MediaStore; import android.util.Log; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import java.net.HttpURLConnection; import java.io.InputStream; import java.net.URL; /** * @author Jason Polites * */ public class ImageUtils { private static int MAX_IMAGE_DIMENSION = 720; public byte[] scaleImage(Context context, Bitmap bitmap, Bitmap.CompressFormat format) { int width = bitmap.getWidth(); if (width > MAX_IMAGE_DIMENSION) { float ratio = (float) MAX_IMAGE_DIMENSION / (float) width; width = MAX_IMAGE_DIMENSION; int height = (int) ((float) bitmap.getHeight() * ratio); bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height); } ByteArrayOutputStream stream = new ByteArrayOutputStream(); bitmap.compress(format, 100, stream); return stream.toByteArray(); } private InputStream retrieveStream(Uri url) { String path = url == null ? null : url.getPath(); if (path == null) { Log.w(getClass().getSimpleName(), "Error in received url: it's null => " + url); return null; } else { Log.w(getClass().getSimpleName(), "Path to the picture received => " + path); } DefaultHttpClient client = new DefaultHttpClient(); HttpGet httpRequest = new HttpGet(path); try { HttpResponse httpResponse = client.execute(httpRequest); final int statusCode = httpResponse.getStatusLine().getStatusCode(); if (statusCode != HttpStatus.SC_OK) { Log.w(getClass().getSimpleName(), "Error => " + statusCode + " => for URL " + url); return null; } HttpEntity httpEntity = httpResponse.getEntity(); return httpEntity.getContent(); } catch (IOException e) { httpRequest.abort(); Log.w(getClass().getSimpleName(), "Error for URL =>" + url, e); } return null; } private InputStream getStreamToUri(Context context, Uri photoUri) { InputStream is = null; try { is = context.getContentResolver().openInputStream(photoUri); } catch (Exception ex) { // URI is not local but the web is = retrieveStream(photoUri); } return is; } public byte[] scaleImage(Context context, Uri photoUri) throws IOException { BitmapFactory.Options dbo = new BitmapFactory.Options(); dbo.inJustDecodeBounds = true; InputStream is = getStreamToUri(context, photoUri); BitmapFactory.decodeStream(is, null, dbo); is.close(); int rotatedWidth, rotatedHeight; int orientation = getOrientation(context, photoUri); if (orientation == 90 || orientation == 270) { rotatedWidth = dbo.outHeight; rotatedHeight = dbo.outWidth; } else { rotatedWidth = dbo.outWidth; rotatedHeight = dbo.outHeight; } Bitmap bitmap; is = getStreamToUri(context, photoUri); if (rotatedWidth > MAX_IMAGE_DIMENSION || rotatedHeight > MAX_IMAGE_DIMENSION) { float widthRatio = ((float) rotatedWidth) / ((float) MAX_IMAGE_DIMENSION); float heightRatio = ((float) rotatedHeight) / ((float) MAX_IMAGE_DIMENSION); float maxRatio = Math.max(widthRatio, heightRatio); // Create the bitmap from file BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = (int) maxRatio; bitmap = BitmapFactory.decodeStream(is, null, options); } else { bitmap = BitmapFactory.decodeStream(is); } is.close(); /* * if the orientation is not 0 (or -1, which means we don't know), we * have to do a rotation. */ if (orientation > 0) { Matrix matrix = new Matrix(); matrix.postRotate(orientation); bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); } String type = "image/png"; ByteArrayOutputStream baos = new ByteArrayOutputStream(); if (type.equals("image/png")) { bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); } else if (type.equals("image/jpg") || type.equals("image/jpeg")) { bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); } byte[] bMapArray = baos.toByteArray(); baos.close(); return bMapArray; } public int getOrientation(Context context, Uri photoUri) { /* it's on the external media. */ Cursor cursor = context.getContentResolver().query(photoUri, new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null); if (cursor == null) { return 0; } if (cursor.getCount() != 1) { return -1; } cursor.moveToFirst(); return cursor.getInt(0); } public static Bitmap getBitmapFromURL(String src) { Bitmap myBitmap = null; HttpURLConnection connection = null; try { URL url = new URL(src); connection = (HttpURLConnection) url.openConnection(); connection.setDoInput(true); connection.connect(); InputStream input = connection.getInputStream(); myBitmap = BitmapFactory.decodeStream(input); } catch (IOException e) { e.printStackTrace(); myBitmap = null; } finally { try { connection.disconnect(); } catch (Exception ignored) { } } return myBitmap; } }