Example usage for android.graphics Bitmap createScaledBitmap

List of usage examples for android.graphics Bitmap createScaledBitmap

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Introduction

In this page you can find the example usage for android.graphics Bitmap createScaledBitmap.

Prototype

public static Bitmap createScaledBitmap(@NonNull Bitmap src, int dstWidth, int dstHeight, boolean filter)

Source Link

Document

Creates a new bitmap, scaled from an existing bitmap, when possible.

Usage

From source file:Main.java

public static Bitmap resizeBitmapToImageView(String path) {
    Bitmap resizedBitmap = null;/*from ww w.ja v  a2s .c  o  m*/
    try {
        int inWidth;
        int inHeight;
        int dstWidth = 1000;
        int dstHeight = 1000;

        InputStream in = new FileInputStream(path);

        // decode image size (decode metadata only, not the whole image)
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(in, null, options);
        in.close();

        // save width and height
        inWidth = options.outWidth;
        inHeight = options.outHeight;

        // decode full image pre-resized
        in = new FileInputStream(path);
        options = new BitmapFactory.Options();
        // calc rought re-size (this is no exact resize)

        options.inSampleSize = Math.max(inWidth / dstWidth, inHeight / dstHeight);
        // decode full image
        Bitmap roughBitmap = BitmapFactory.decodeStream(in, null, options);

        // calc exact destination size
        Matrix m = new Matrix();
        RectF inRect = new RectF(0, 0, roughBitmap.getWidth(), roughBitmap.getHeight());
        RectF outRect = new RectF(0, 0, dstWidth, dstHeight);
        m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER);
        float[] values = new float[9];
        m.getValues(values);

        // resize bitmap
        resizedBitmap = Bitmap.createScaledBitmap(roughBitmap, (int) (roughBitmap.getWidth() * values[0]),
                (int) (roughBitmap.getHeight() * values[4]), true);

        // save image
        //            try {
        //                FileOutputStream out = new FileOutputStream(path);
        //                resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
        //            } catch (Exception e) {
        ////                Log.e("Image", e.getMessage(), e);
        //            }
    } catch (IOException e) {
        //            Log.e("Image", e.getMessage(), e);
    }
    return resizedBitmap;
}

From source file:Main.java

private static void saveSmallerImage(String pathOfInputImage, int dstWidth, int dstHeight) {
    try {//from w ww  .  ja  v  a  2  s  .c  om
        int inWidth = 0;
        int inHeight = 0;

        InputStream in = new FileInputStream(pathOfInputImage);

        // decode image size (decode metadata only, not the whole image)
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(in, null, options);
        in.close();
        in = null;

        // save width and height
        inWidth = options.outWidth;
        inHeight = options.outHeight;

        // decode full image pre-resized
        in = new FileInputStream(pathOfInputImage);
        options = new BitmapFactory.Options();
        // calc rought re-size (this is no exact resize)
        options.inSampleSize = Math.max(inWidth / dstWidth, inHeight / dstHeight);
        // decode full image
        Bitmap roughBitmap = BitmapFactory.decodeStream(in, null, options);

        // calc exact destination size
        Matrix m = new Matrix();
        RectF inRect = new RectF(0, 0, roughBitmap.getWidth(), roughBitmap.getHeight());
        RectF outRect = new RectF(0, 0, dstWidth, dstHeight);
        m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER);
        float[] values = new float[9];
        m.getValues(values);

        // resize bitmap
        Bitmap resizedBitmap = Bitmap.createScaledBitmap(roughBitmap,
                (int) (roughBitmap.getWidth() * values[0]), (int) (roughBitmap.getHeight() * values[4]), true);

        // save image
        try {
            FileOutputStream out = new FileOutputStream(pathOfInputImage);
            resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
        } catch (Exception e) {
            Log.e("Image", e.getMessage(), e);
        }
    } catch (IOException e) {
        Log.e("Image", e.getMessage(), e);
    } catch (Exception e) {
        Log.e("Image", e.getMessage());
    }
}

From source file:Main.java

/**
 * Stack Blur v1.0 from/*from w  w w.j a  v a  2  s. com*/
 * http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
 * Java Author: Mario Klingemann <mario at quasimondo.com>
 * http://incubator.quasimondo.com
 * <p/>
 * created Feburary 29, 2004
 * Android port : Yahel Bouaziz <yahel at kayenko.com>
 * http://www.kayenko.com
 * ported april 5th, 2012
 * <p/>
 * This is a compromise between Gaussian Blur and Box blur
 * It creates much better looking blurs than Box Blur, but is
 * 7x faster than my Gaussian Blur implementation.
 * <p/>
 * I called it Stack Blur because this describes best how this
 * filter works internally: it creates a kind of moving stack
 * of colors whilst scanning through the image. Thereby it
 * just has to add one new block of color to the right side
 * of the stack and remove the leftmost color. The remaining
 * colors on the topmost layer of the stack are either added on
 * or reduced by one, depending on if they are on the right or
 * on the left side of the stack.
 * <p/>
 * If you are using this algorithm in your code please add
 * the following line:
 * Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>
 */

public static Bitmap fastblur(Bitmap sentBitmap, float scale, int radius) {

    int width = Math.round(sentBitmap.getWidth() * scale);
    int height = Math.round(sentBitmap.getHeight() * scale);
    sentBitmap = Bitmap.createScaledBitmap(sentBitmap, width, height, false);

    Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

    if (radius < 1) {
        return (null);
    }

    int w = bitmap.getWidth();
    int h = bitmap.getHeight();

    int[] pix = new int[w * h];
    Log.e("pix", w + " " + h + " " + pix.length);
    bitmap.getPixels(pix, 0, w, 0, 0, w, h);

    int wm = w - 1;
    int hm = h - 1;
    int wh = w * h;
    int div = radius + radius + 1;

    int r[] = new int[wh];
    int g[] = new int[wh];
    int b[] = new int[wh];
    int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
    int vmin[] = new int[Math.max(w, h)];

    int divsum = (div + 1) >> 1;
    divsum *= divsum;
    int dv[] = new int[256 * divsum];
    for (i = 0; i < 256 * divsum; i++) {
        dv[i] = (i / divsum);
    }

    yw = yi = 0;

    int[][] stack = new int[div][3];
    int stackpointer;
    int stackstart;
    int[] sir;
    int rbs;
    int r1 = radius + 1;
    int routsum, goutsum, boutsum;
    int rinsum, ginsum, binsum;

    for (y = 0; y < h; y++) {
        rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
        for (i = -radius; i <= radius; i++) {
            p = pix[yi + Math.min(wm, Math.max(i, 0))];
            sir = stack[i + radius];
            sir[0] = (p & 0xff0000) >> 16;
            sir[1] = (p & 0x00ff00) >> 8;
            sir[2] = (p & 0x0000ff);
            rbs = r1 - Math.abs(i);
            rsum += sir[0] * rbs;
            gsum += sir[1] * rbs;
            bsum += sir[2] * rbs;
            if (i > 0) {
                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];
            } else {
                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];
            }
        }
        stackpointer = radius;

        for (x = 0; x < w; x++) {

            r[yi] = dv[rsum];
            g[yi] = dv[gsum];
            b[yi] = dv[bsum];

            rsum -= routsum;
            gsum -= goutsum;
            bsum -= boutsum;

            stackstart = stackpointer - radius + div;
            sir = stack[stackstart % div];

            routsum -= sir[0];
            goutsum -= sir[1];
            boutsum -= sir[2];

            if (y == 0) {
                vmin[x] = Math.min(x + radius + 1, wm);
            }
            p = pix[yw + vmin[x]];

            sir[0] = (p & 0xff0000) >> 16;
            sir[1] = (p & 0x00ff00) >> 8;
            sir[2] = (p & 0x0000ff);

            rinsum += sir[0];
            ginsum += sir[1];
            binsum += sir[2];

            rsum += rinsum;
            gsum += ginsum;
            bsum += binsum;

            stackpointer = (stackpointer + 1) % div;
            sir = stack[(stackpointer) % div];

            routsum += sir[0];
            goutsum += sir[1];
            boutsum += sir[2];

            rinsum -= sir[0];
            ginsum -= sir[1];
            binsum -= sir[2];

            yi++;
        }
        yw += w;
    }
    for (x = 0; x < w; x++) {
        rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
        yp = -radius * w;
        for (i = -radius; i <= radius; i++) {
            yi = Math.max(0, yp) + x;

            sir = stack[i + radius];

            sir[0] = r[yi];
            sir[1] = g[yi];
            sir[2] = b[yi];

            rbs = r1 - Math.abs(i);

            rsum += r[yi] * rbs;
            gsum += g[yi] * rbs;
            bsum += b[yi] * rbs;

            if (i > 0) {
                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];
            } else {
                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];
            }

            if (i < hm) {
                yp += w;
            }
        }
        yi = x;
        stackpointer = radius;
        for (y = 0; y < h; y++) {
            // Preserve alpha channel: ( 0xff000000 & pix[yi] )
            pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];

            rsum -= routsum;
            gsum -= goutsum;
            bsum -= boutsum;

            stackstart = stackpointer - radius + div;
            sir = stack[stackstart % div];

            routsum -= sir[0];
            goutsum -= sir[1];
            boutsum -= sir[2];

            if (x == 0) {
                vmin[y] = Math.min(y + r1, hm) * w;
            }
            p = x + vmin[y];

            sir[0] = r[p];
            sir[1] = g[p];
            sir[2] = b[p];

            rinsum += sir[0];
            ginsum += sir[1];
            binsum += sir[2];

            rsum += rinsum;
            gsum += ginsum;
            bsum += binsum;

            stackpointer = (stackpointer + 1) % div;
            sir = stack[stackpointer];

            routsum += sir[0];
            goutsum += sir[1];
            boutsum += sir[2];

            rinsum -= sir[0];
            ginsum -= sir[1];
            binsum -= sir[2];

            yi += w;
        }
    }

    Log.e("pix", w + " " + h + " " + pix.length);
    bitmap.setPixels(pix, 0, w, 0, 0, w, h);

    return (bitmap);
}

From source file:Main.java

public static Bitmap loadSizeLimitedBitmapFromUri(Uri imageUri, ContentResolver contentResolver) {
    try {//from  w  w w  . j  a v a2s  .c  om
        // Load the image into InputStream.
        InputStream imageInputStream = contentResolver.openInputStream(imageUri);

        // For saving memory, only decode the image meta and get the side length.
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        Rect outPadding = new Rect();
        BitmapFactory.decodeStream(imageInputStream, outPadding, options);

        // Calculate shrink rate when loading the image into memory.
        int maxSideLength = options.outWidth > options.outHeight ? options.outWidth : options.outHeight;
        options.inSampleSize = 1;
        options.inSampleSize = calculateSampleSize(maxSideLength, IMAGE_MAX_SIDE_LENGTH);
        options.inJustDecodeBounds = false;
        imageInputStream.close();

        // Load the bitmap and resize it to the expected size length
        imageInputStream = contentResolver.openInputStream(imageUri);
        Bitmap bitmap = BitmapFactory.decodeStream(imageInputStream, outPadding, options);
        maxSideLength = bitmap.getWidth() > bitmap.getHeight() ? bitmap.getWidth() : bitmap.getHeight();
        double ratio = IMAGE_MAX_SIDE_LENGTH / (double) maxSideLength;
        if (ratio < 1) {
            bitmap = Bitmap.createScaledBitmap(bitmap, (int) (bitmap.getWidth() * ratio),
                    (int) (bitmap.getHeight() * ratio), false);
        }

        return rotateBitmap(bitmap, getImageRotationAngle(imageUri, contentResolver));
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static Bitmap loadSizeLimitedBitmapFromUri(Uri imageUri, ContentResolver contentResolver) {
    try {/* w  w  w.  j  av a2 s.c  o  m*/
        // Load the image into InputStream.
        InputStream imageInputStream = contentResolver.openInputStream(imageUri);

        // For saving memory, only decode the image meta and get the side length.
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        Rect outPadding = new Rect();
        BitmapFactory.decodeStream(imageInputStream, outPadding, options);

        // Calculate shrink rate when loading the image into memory.
        int maxSideLength = options.outWidth > options.outHeight ? options.outWidth : options.outHeight;
        options.inSampleSize = 1;
        options.inSampleSize = calculateSampleSize(maxSideLength, IMAGE_MAX_SIDE_LENGTH);
        options.inJustDecodeBounds = false;
        if (imageInputStream != null) {
            imageInputStream.close();
        }

        // Load the bitmap and resize it to the expected size length
        imageInputStream = contentResolver.openInputStream(imageUri);
        Bitmap bitmap = BitmapFactory.decodeStream(imageInputStream, outPadding, options);
        maxSideLength = bitmap.getWidth() > bitmap.getHeight() ? bitmap.getWidth() : bitmap.getHeight();
        double ratio = IMAGE_MAX_SIDE_LENGTH / (double) maxSideLength;
        if (ratio < 1) {
            bitmap = Bitmap.createScaledBitmap(bitmap, (int) (bitmap.getWidth() * ratio),
                    (int) (bitmap.getHeight() * ratio), false);
        }

        return rotateBitmap(bitmap, getImageRotationAngle(imageUri, contentResolver));
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static Bitmap formatBitmap(Bitmap bitmap, int width, int height) {

    int wh = Math.max(bitmap.getWidth(), bitmap.getHeight());
    Bitmap mBitmap = Bitmap.createBitmap(wh, wh, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(mBitmap);
    canvas.drawBitmap(bitmap, -(bitmap.getWidth() - wh) / 2, -(bitmap.getHeight() - wh) / 2, null);
    bitmap = Bitmap.createScaledBitmap(mBitmap, width, height, true);
    return bitmap;
}

From source file:Main.java

/**
 * Resize a {@link Drawable} to the given size.<br />
 * Metrics and density are given by the {@link Resources} bount to this instance.
 * @param ctx Context./* ww  w .  j  ava2  s . c om*/
 * @param drawable {@link Drawable} to resize.
 * @param widthId Reference to the dimension containing the desired width.
 * @param heightId Reference to the dimension containing the desired height.
 * @return A scaled {@link Drawable}.
 */
public static Drawable resizeDrawable(Context ctx, Drawable drawable, int widthId, int heightId) {
    Resources res = ctx.getResources();
    //float density = res.getDisplayMetrics().density;

    //Get a bitmap from the drawable
    Bitmap bmp = drawableToBitmap(drawable);

    //Create a scaled bitmap
    //      bmp = Bitmap.createScaledBitmap(
    //            bmp,
    //            (int)(width * density),
    //            (int)(height * density),
    //            true);
    bmp = Bitmap.createScaledBitmap(bmp, res.getDimensionPixelSize(widthId),
            res.getDimensionPixelSize(heightId), true);

    //Convert bitmap to drawable
    return new BitmapDrawable(res, bmp);
}

From source file:Main.java

/**
 * Resize a bitmap object to fit the passed width and height
 * /*w w  w  .  jav  a2 s. co  m*/
 * @param input
 *           The bitmap to be resized
 * @param destWidth
 *           Desired maximum width of the result bitmap
 * @param destHeight
 *           Desired maximum height of the result bitmap
 * @return A new resized bitmap
 * @throws OutOfMemoryError
 *            if the operation exceeds the available vm memory
 */
public static Bitmap resizeBitmap(final Bitmap input, int destWidth, int destHeight, int rotation)
        throws OutOfMemoryError, Exception {

    int dstWidth = destWidth;
    int dstHeight = destHeight;
    final int srcWidth = input.getWidth();
    final int srcHeight = input.getHeight();

    if (rotation == 90 || rotation == 270) {
        dstWidth = destHeight;
        dstHeight = destWidth;
    }

    boolean needsResize = false;
    float p;
    if ((srcWidth > dstWidth) || (srcHeight > dstHeight)) {
        needsResize = true;
        if ((srcWidth > srcHeight) && (srcWidth > dstWidth)) {
            p = (float) dstWidth / (float) srcWidth;
            dstHeight = (int) (srcHeight * p);
        } else {
            p = (float) dstHeight / (float) srcHeight;
            dstWidth = (int) (srcWidth * p);
        }
    } else {
        dstWidth = srcWidth;
        dstHeight = srcHeight;
    }

    if (needsResize || rotation != 0) {
        Bitmap output;

        if (rotation == 0) {
            output = Bitmap.createScaledBitmap(input, dstWidth, dstHeight, true);
        } else {
            Matrix matrix = new Matrix();
            matrix.postScale((float) dstWidth / srcWidth, (float) dstHeight / srcHeight);
            matrix.postRotate(rotation);
            output = Bitmap.createBitmap(input, 0, 0, srcWidth, srcHeight, matrix, true);
        }
        return output;
    } else
        return input;
}

From source file:Main.java

public static Bitmap getDefaultArtwork(Context context, int id, int w, int h) {
    BitmapFactory.Options sBitmapOptionsCache = new BitmapFactory.Options();
    Bitmap b = null;/*from   w w w.  j  a v  a 2 s. c om*/
    int sampleSize = 1;

    sBitmapOptionsCache.inPreferredConfig = Bitmap.Config.ARGB_8888;

    // Compute the closest power-of-two scale factor 
    // and pass that to sBitmapOptionsCache.inSampleSize, which will
    // result in faster decoding and better quality
    sBitmapOptionsCache.inJustDecodeBounds = true;

    BitmapFactory.decodeResource(context.getResources(), id, sBitmapOptionsCache);
    int nextWidth = sBitmapOptionsCache.outWidth >> 1;
    int nextHeight = sBitmapOptionsCache.outHeight >> 1;
    while (nextWidth > w && nextHeight > h) {
        sampleSize <<= 1;
        nextWidth >>= 1;
        nextHeight >>= 1;
    }

    sBitmapOptionsCache.inSampleSize = sampleSize;
    sBitmapOptionsCache.inJustDecodeBounds = false;
    b = BitmapFactory.decodeResource(context.getResources(), id, sBitmapOptionsCache);

    if (b != null) {
        // finally rescale to exactly the size we need
        if (sBitmapOptionsCache.outWidth != w || sBitmapOptionsCache.outHeight != h) {
            Bitmap tmp = Bitmap.createScaledBitmap(b, w, h, true);
            // Bitmap.createScaledBitmap() can return the same bitmap
            if (tmp != b)
                b.recycle();
            b = tmp;
        }
    }

    return b;
}

From source file:Main.java

public static Bitmap resizeBitmap(Bitmap input, int destWidth, int destHeight, int rotation)
        throws OutOfMemoryError {
    int dstWidth = destWidth;
    int dstHeight = destHeight;
    int srcWidth = input.getWidth();
    int srcHeight = input.getHeight();

    if ((rotation == 90) || (rotation == 270)) {
        dstWidth = destHeight;/*from   w  w  w  . j ava  2 s .c  o  m*/
        dstHeight = destWidth;
    }

    boolean needsResize = false;

    if ((srcWidth > dstWidth) || (srcHeight > dstHeight)) {
        needsResize = true;

        float ratio1 = (float) srcWidth / dstWidth;
        float ratio2 = (float) srcHeight / dstHeight;
        Log.v("dsd", "ratio1:" + ratio1 + " ratio2:" + ratio2);

        if (ratio1 > ratio2) {
            float p = (float) dstWidth / srcWidth;
            dstHeight = (int) (srcHeight * p);
        } else {
            float p = (float) dstHeight / srcHeight;
            dstWidth = (int) (srcWidth * p);
        }
    } else {
        dstWidth = srcWidth;
        dstHeight = srcHeight;
    }

    Log.v("dsd", "dstWidth:" + dstWidth + " dstHeight:" + dstHeight + " srcWidth:" + srcWidth + " srcHeight:"
            + srcHeight);
    if ((needsResize) || (rotation != 0)) {
        Bitmap output = null;
        if (rotation == 0) {
            output = Bitmap.createScaledBitmap(input, dstWidth, dstHeight, true);
        } else {
            Matrix matrix = new Matrix();
            matrix.postScale((float) dstWidth / srcWidth, (float) dstHeight / srcHeight);
            matrix.postRotate(rotation);
            output = Bitmap.createBitmap(input, 0, 0, srcWidth, srcHeight, matrix, true);
        }
        return output;
    }
    return input;
}