Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Matrix;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    public static boolean rotateBitmap(File inFile, File outFile, int angle)
            throws FileNotFoundException, IOException {
        // Declare
        FileInputStream inStream = null;
        FileOutputStream outStream = null;
        // Create options
        BitmapFactory.Options options = new BitmapFactory.Options();
        // Create transform matrix
        Matrix matrix = new Matrix();
        matrix.postRotate(angle);
        // Increment inSampleSize progressively to reduce image resolution and size. If
        // the program is properly managing memory, and you don't have other large images
        // loaded in memory, this loop will generally not need to go through more than 3
        // iterations. To be safe though, we stop looping after a certain amount of tries
        // to avoid infinite loops
        for (options.inSampleSize = 1; options.inSampleSize <= 32; options.inSampleSize++) {
            try {
                // Load the bitmap from file
                inStream = new FileInputStream(inFile);
                Bitmap originalBitmap = BitmapFactory.decodeStream(inStream, null, options);
                // Rotate the bitmap
                Bitmap rotatedBitmap = Bitmap.createBitmap(originalBitmap, 0, 0, originalBitmap.getWidth(),
                        originalBitmap.getHeight(), matrix, true);
                // Save the rotated bitmap
                outStream = new FileOutputStream(outFile);
                rotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
                outStream.close();
                // Recycle the bitmaps to immediately free memory
                originalBitmap.recycle();
                originalBitmap = null;
                rotatedBitmap.recycle();
                rotatedBitmap = null;
                // Return
                return true;
            } catch (OutOfMemoryError e) {
                // If an OutOfMemoryError occurred, we continue with for loop and next inSampleSize value
            } finally {
                // Clean-up if we failed on save
                if (outStream != null) {
                    try {
                        outStream.close();
                    } catch (IOException e) {
                    }
                }
            }
        }
        // Failed
        return false;
    }
}