Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*******************************************************************************
 * Copyright 2014 Federico Iosue (federico.iosue@gmail.com)
 * 
 * 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.content.Context;
import android.graphics.Bitmap;

import android.graphics.Matrix;

public class Main {
    /**
     * Scales a bitmap to fit required ratio
     */
    @SuppressWarnings("unused")
    private static Bitmap scaleImage(Context mContext, Bitmap bitmap, int reqWidth, int reqHeight) {

        // Get current dimensions AND the desired bounding box
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        int boundingX = dpToPx(mContext, reqWidth);
        int boundingY = dpToPx(mContext, reqHeight);

        // Determine how much to scale: the dimension requiring less scaling is
        // closer to the its side. This way the image always stays inside your
        // bounding box AND either x/y axis touches it.
        float xScale = ((float) boundingX) / width;
        float yScale = ((float) boundingY) / height;
        float scale = (xScale >= yScale) ? xScale : yScale;

        // Create a matrix for the scaling and add the scaling data
        Matrix matrix = new Matrix();
        matrix.postScale(scale, scale);

        // Create a new bitmap and convert it to a format understood by the
        // ImageView
        Bitmap scaledBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);

        return scaledBitmap;
    }

    private static int dpToPx(Context mContext, int dp) {
        float density = mContext.getResources().getDisplayMetrics().density;
        return Math.round((float) dp * density);
    }
}