write Bitmap to PNG or JPEG - Android Graphics

Android examples for Graphics:JPEG Image

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Description

write Bitmap to PNG or JPEG

Demo Code


//package com.java2s;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.os.Environment;

public class Main {
    public static String writeBitmap(byte[] data) throws IOException {
        File file = new File(Environment.getExternalStorageDirectory()
                + "/bookclip/");
        file.mkdir();//w w w.  j  a v  a 2 s . c o  m
        String bitmapPath = file.getPath() + "/"
                + System.currentTimeMillis() + ".jpg";
        FileOutputStream outStream = new FileOutputStream(bitmapPath);
        outStream.write(data);
        outStream.close();

        return bitmapPath;
    }

    public static String writeBitmap(byte[] data, int cameraDegree,
            Rect rect, Rect willTransformRect) throws IOException {
        File file = new File(Environment.getExternalStorageDirectory()
                + "/bookclip/");
        file.mkdir();
        String bitmapPath = file.getPath() + "/"
                + System.currentTimeMillis() + ".png";

        // bitmap rotation, scaling, crop
        BitmapFactory.Options option = new BitmapFactory.Options();
        option.inSampleSize = 2;
        Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,
                option);
        Matrix bitmapMatrix = new Matrix();
        bitmapMatrix.setRotate(cameraDegree);
        int x = rect.left, y = rect.top, width = rect.right - rect.left, height = rect.bottom
                - rect.top;
        Bitmap rotateBitmap = Bitmap.createBitmap(bitmap, 0, 0,
                bitmap.getWidth(), bitmap.getHeight(), bitmapMatrix, false);
        // bitmap recycle
        bitmap.recycle();

        Bitmap scaledBitmap = Bitmap.createScaledBitmap(rotateBitmap,
                willTransformRect.right, willTransformRect.bottom
                        - willTransformRect.top, false);
        // rotatebitmap recycle
        rotateBitmap.recycle();

        Bitmap cropBitmap = Bitmap.createBitmap(scaledBitmap, x, y, width,
                height, null, false);
        // scaledBitmap recycle
        scaledBitmap.recycle();

        // file write
        FileOutputStream fos = new FileOutputStream(new File(bitmapPath));
        cropBitmap.compress(CompressFormat.PNG, 100, fos);
        fos.flush();
        fos.close();

        // recycle
        cropBitmap.recycle();

        return bitmapPath;
    }
}

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