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.util.Log;

public class Main {
    private static Context context;

    public static Bitmap decodeSampledBitmapFromResource(int resId, int reqWidth, int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(context.getResources(), resId, options);

        // Calculate inSampleSize
        float sampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        Log.d("----> Sample Size:", sampleSize + "");
        if (sampleSize < 1) { // return a scaled UP version of image
            Bitmap bg = BitmapFactory.decodeResource(context.getResources(), resId);
            Bitmap scaledBitmap = Bitmap.createScaledBitmap(bg, (int) (bg.getWidth() / sampleSize),
                    (int) (bg.getHeight() / sampleSize), true);
            bg.recycle();
            return scaledBitmap;
        } else { // return a scaled DOWN version of image
            options.inSampleSize = Math.round(sampleSize);
            // Decode bitmap with inSampleSize set
            options.inJustDecodeBounds = false;
            return BitmapFactory.decodeResource(context.getResources(), resId, options);
        }
    }

    public static float calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
        // Raw height and width of image
        final int height = options.outHeight;
        final int width = options.outWidth;
        float inSampleSize = 1;

        if (height >= reqHeight || width >= reqWidth) {
            if (width > height) {
                inSampleSize = height / (float) reqHeight;
            } else {
                inSampleSize = width / (float) reqWidth;
            }

        } else {
            inSampleSize = Math.min((float) width / reqWidth, (float) height / reqHeight);
        }
        return inSampleSize;
    }
}