Java tutorial
package com.BeeFramework.Utils; import android.graphics.Bitmap; import android.graphics.Matrix; import org.json.JSONException; import org.json.JSONTokener; /* * ______ ______ ______ * /\ __ \ /\ ___\ /\ ___\ * \ \ __< \ \ __\_ \ \ __\_ * \ \_____\ \ \_____\ \ \_____\ * \/_____/ \/_____/ \/_____/ * * * Copyright (c) 2013-2014, {Bee} open source community * http://www.bee-framework.com * * * 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. */ public class Utils { public static Object parseResponse(String responseBody) throws JSONException { Object result = null; //trim the string to prevent start with blank, and test if the string is valid JSON, because the parser don't do this :(. If Json is not valid this will return null responseBody = responseBody.trim(); if (responseBody.startsWith("{") || responseBody.startsWith("[")) { result = new JSONTokener(responseBody).nextValue(); } if (result == null) { result = responseBody; } return result; } public static Bitmap scaleBitmap(Bitmap bm, int pixel) { int srcHeight = bm.getHeight(); int srcWidth = bm.getWidth(); if (srcHeight > pixel || srcWidth > pixel) { float scale_y = 0; float scale_x = 0; if (srcHeight > srcWidth) { scale_y = ((float) pixel) / srcHeight; scale_x = scale_y; } else { scale_x = ((float) pixel) / srcWidth; scale_y = scale_x; } Matrix matrix = new Matrix(); matrix.postScale(scale_x, scale_y); Bitmap dstbmp = Bitmap.createBitmap(bm, 0, 0, srcWidth, srcHeight, matrix, true); return dstbmp; } else { return Bitmap.createBitmap(bm); } } public static Bitmap scaleBitmap(Bitmap bm, int dstHeight, int dstWidth) { if (bm == null) return null;//java.lang.NullPointerException int srcHeight = bm.getHeight(); int srcWidth = bm.getWidth(); if (srcHeight > dstHeight || srcWidth > dstWidth) { float scale_y = ((float) dstHeight) / srcHeight; float scale_x = ((float) dstWidth) / srcWidth; float scale = scale_y < scale_x ? scale_y : scale_x; Matrix matrix = new Matrix(); matrix.postScale(scale, scale); Bitmap dstbmp = Bitmap.createBitmap(bm, 0, 0, srcWidth, srcHeight, matrix, true); return dstbmp; } else { return Bitmap.createBitmap(bm); } } }