Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

public class Main {
    public static Bitmap decodeSampledBitmapFromPath(String path, int reqWidth, int reqHeight) {

        if (path == null) {
            return null;
        }

        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        File file = new File(path);
        InputStream in = null;
        try {
            in = new FileInputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return null;
        }
        BitmapFactory.decodeStream(in, null, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        options.inJustDecodeBounds = false;

        try {
            in = new FileInputStream(file);

        } catch (FileNotFoundException e) {

            e.printStackTrace();
            return null;
        }

        return BitmapFactory.decodeStream(in, null, options);
    }

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

        if (height > reqHeight || width > reqWidth) {

            // Calculate ratios of height and width to requested height and
            // width
            final int heightRatio = Math.round((float) height / (float) reqHeight);
            final int widthRatio = Math.round((float) width / (float) reqWidth);

            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }

        return inSampleSize;
    }
}