Example usage for android.graphics BitmapFactory decodeByteArray

Introduction

In this page you can find the example usage for android.graphics BitmapFactory decodeByteArray.

Prototype

public static Bitmap decodeByteArray(byte[] data, int offset, int length, Options opts) 

Source Link

Document

Decode an immutable bitmap from the specified byte array.

Usage

From source file:Main.java

public static Bitmap decodeCropBitmapFromByteArray(byte[] byteArray, int x, int y, int width, int height) {

    Bitmap bitmap;/*from w  ww  . j  av  a 2s  .  co m*/
    Bitmap croppedBitmap;
    final BitmapFactory.Options options = new BitmapFactory.Options();

    // First decode with inJustDecodeBounds=true to check dimensions
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    // Enables bitmap re-usage
    options.inMutable = true;

    /* EFFICIENT Crop ? - Creates new Bitmap */// <- Best option?
    bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);
    croppedBitmap = Bitmap.createBitmap(bitmap, x, y, width, height);
    bitmap.recycle();

    /* EFFICIENT Crop ? - Reuses bitmap, but it is slow */
    //        croppedBitmap = BitmapFactory.decodeResource(res, resId, options);
    //        int[] pixels = getPixelsFromBitmap(croppedBitmap,
    //                x, y,
    //                width, height);
    //        croppedBitmap.setPixels(pixels, 0, width,
    //                0, 0,
    //                width, height);

    return croppedBitmap;
}

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From source file:Main.java

/**
 * Gets a bitmap from data.//from   w w w .j  a  va2  s. c  o m
 *
 * @param data data
 * @return Bitmap or null on error
 */
public static Bitmap getBitmap(final byte[] data) {
    if (data != null) {
        try {
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inMutable = true;
            return BitmapFactory.decodeByteArray(data, 0, data.length, options);
        } catch (OutOfMemoryError e) {
            return null;
        }
    }
    return null;
}

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From source file:Main.java

/**
 * <pre>//from w w w . j a  va  2 s.  c  o m
 * Get width and height of bitmap from byte array.
 * </pre>
 * @param bmData bitmap binary data
 * @return integer array with 2 elements: width and height
 */
public static int[] getBitmapSizes(byte[] bmData) {
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeByteArray(bmData, 0, bmData.length, bmOptions);
    return new int[] { bmOptions.outWidth, bmOptions.outHeight };
}

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From source file:Main.java

public static Bitmap byteToBitmap(byte[] bitmapData) {
    if (bitmapData == null)
        return null;
    Options options = new Options();
    options.inJustDecodeBounds = true;//  w  ww  .  j a  v a2  s.c om
    int srcWidth = options.outWidth;
    options.inJustDecodeBounds = false;
    int be = 0;
    be = (int) Math.round(((double) srcWidth) / ((double) 80));
    options = new Options();
    options.inSampleSize = be;
    try {
        return BitmapFactory.decodeByteArray(bitmapData, 0, bitmapData.length, options);
    } catch (OutOfMemoryError e) {
        return null;
    }
}

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From source file:Main.java

/**
 * Checks whether data is valid.//  w  w  w. j  a va2  s.  com
 *
 * @param data image data
 * @return true if data is valid, false otherwise
 */
public static boolean checkBitmap(byte[] data) {
    if (data != null) {
        try {
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeByteArray(data, 0, data.length, options);
            if (options.outWidth > MAX_SIZE || options.outHeight > MAX_SIZE) {
                return false;
            } else {
                return options.outWidth > 0 && options.outHeight > 0;
            }
        } catch (Throwable t) {
            // format error if an error has occurred
            return false;
        }
    }
    return false;
}

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From source file:Main.java

/**
 * bitmaps.set(/*from   www  . ja v a 2 s .com*/
 * position,
 * BitmapUtils.decodeSampledBitmapFromByteArray(
 * imageBytes,
 * context.getResources().getDimensionPixelSize(R.dimen.width),
 * context.getResources().getDimensionPixelSize(R.dimen.height)));
 */
public static Bitmap decodeSampledBitmapFromByteArray(byte[] byteArray, int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);

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

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);
}

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From source file:Main.java

public static boolean StoreByteImage(Context mContext, byte[] imageData, int quality, String expName) {

    File sdImageMainDirectory = new File("/sdcard/myImages");
    FileOutputStream fileOutputStream = null;
    String nameFile = "";
    try {//from w  w  w.j  ava  2 s . co  m

        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 5;

        Bitmap myImage = BitmapFactory.decodeByteArray(imageData, 0, imageData.length, options);

        fileOutputStream = new FileOutputStream(sdImageMainDirectory.toString() + "/" + nameFile + ".jpg");

        BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);

        myImage.compress(CompressFormat.JPEG, quality, bos);

        bos.flush();
        bos.close();

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return true;
}

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From source file:Main.java

public static Bitmap decodeSampledBitmapFromBitmap(Bitmap bitmap, int reqWidth, int reqHeight) {
    // Calculate inSampleSize
    final Options options = new Options();
    options.inSampleSize = calculateInSampleSize(bitmap.getWidth(), bitmap.getHeight(), reqWidth, reqHeight);
    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;//  w  ww  .j  a v a  2 s. c  om
    byte[] data = bitmap2Bytes(bitmap);
    if (data != null) {
        bitmap.recycle();
        return BitmapFactory.decodeByteArray(data, 0, data.length, options);
    } else {
        return bitmap;
    }
}

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From source file:Main.java

public static Bitmap createBitmapFromByteArray(byte[] data, Size previewSize) {
    YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21, previewSize.width, previewSize.height, null);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    yuvimage.compressToJpeg(new Rect(0, 0, previewSize.width, previewSize.height), 80, baos);
    byte[] jdata = baos.toByteArray();
    BitmapFactory.Options opt = new BitmapFactory.Options();
    opt.inMutable = true;/*from  w  ww .  j a va  2  s  .c  o m*/
    Bitmap bitmap = BitmapFactory.decodeByteArray(jdata, 0, jdata.length, opt);

    Matrix matrix = new Matrix();
    matrix.postRotate(-90);

    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}

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From source file:Main.java

/**
 * Decode a byte array to a Bitmap with a process requiring a low amount of memory
 * @param bt image as bytes/*  w w  w .  j a v  a 2 s. c  o  m*/
 * @return image as bitmap
 */
public static Bitmap LowMemBitmapDecoder(byte[] bt) {
    Bitmap bm = null;

    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inPreferredConfig = Bitmap.Config.RGB_565;
    options.inPurgeable = true;
    options.inInputShareable = true;
    options.inJustDecodeBounds = false;
    bm = BitmapFactory.decodeByteArray(bt, 0, bt.length, options);

    return bm;
}

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