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.FileOutputStream;
import java.io.IOException;

public class Main {

    public static boolean compressAndSaveBitmap(File input, File output, int width, int height, int quality) {
        Bitmap bitmap = getSmallBitmap(input.getAbsolutePath(), width, height);
        return saveBitmap(bitmap, output.getAbsolutePath(), quality);
    }

    public static Bitmap getSmallBitmap(String filePath, int width, int height) {
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);
        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options, width, height);
        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(filePath, options);
    }

    @SuppressWarnings("ResultOfMethodCallIgnored")
    public static boolean saveBitmap(Bitmap bitmap, String filePath, int quality) {
        boolean result = false;
        FileOutputStream fileOutputStream = null;
        try {
            File file = new File(filePath);
            if (file.exists())
                file.delete();
            fileOutputStream = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.JPEG, quality, fileOutputStream);
            fileOutputStream.flush();
            result = true;
        } catch (IOException ignored) {
        } finally {
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException ignored) {
                }
            }
        }
        return result;
    }

    public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;
        if (height > reqHeight || width > reqWidth) {
            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;
    }
}