Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;

public class Main {
    public static Bitmap scaleWithRatio(Context c, int res, int max) {
        Bitmap bmp = imageResourceToBitmap(c, res, max);

        int width = bmp.getWidth();
        int height = bmp.getHeight();

        // calculate the scale - in this case = 0.4f
        float scaleHeight = ((float) max) / height;
        float scaleWidth = ((float) max) / width;

        // createa matrix for the manipulation
        Matrix matrix = new Matrix();
        // resize the bit map
        matrix.postScale(scaleWidth, scaleHeight);

        // recreate the new Bitmap and return it
        return Bitmap.createBitmap(bmp, 0, 0, width, height, matrix, true);
    }

    public static Bitmap imageResourceToBitmap(Context c, int res, int maxDim) {
        Bitmap bmp = null;
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inJustDecodeBounds = true;
        // compute the smallest size bitmap we need to read
        BitmapFactory.decodeResource(c.getResources(), res, opts);
        int w = opts.outWidth;
        int h = opts.outHeight;
        int s = 1;
        while (true) {
            if ((w / 2 < maxDim) || (h / 2 < maxDim)) {
                break;
            }
            w /= 2;
            h /= 2;
            s++;
        }
        // scale and read the data
        opts.inJustDecodeBounds = false;
        opts.inSampleSize = s;
        bmp = BitmapFactory.decodeResource(c.getResources(), res, opts);
        return bmp;
    }
}