Example usage for android.graphics BitmapFactory decodeStream

Introduction

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

Prototype

@Nullable
public static Bitmap decodeStream(@Nullable InputStream is, @Nullable Rect outPadding, @Nullable Options opts) 

Source Link

Document

Decode an input stream into a bitmap.

Usage

From source file:Main.java

public static Bitmap resizeBitmapToImageView(String path) {
    Bitmap resizedBitmap = null;/*from  w w  w . j  av a 2  s  .  co  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;
}

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From source file:Main.java

public static boolean decodeImageBounds(InputStream stream, int[] outSize, BitmapFactory.Options options) {
    BitmapFactory.decodeStream(stream, null, options);
    if ((options.outHeight > 0) && (options.outWidth > 0)) {
        outSize[0] = options.outWidth;//from ww w. j ava2  s.c o  m
        outSize[1] = options.outHeight;
        return true;
    }
    return false;
}

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From source file:Main.java

public static Bitmap getThumbnail(Context context, Uri uri, int size)
        throws FileNotFoundException, IOException {
    InputStream input = context.getContentResolver().openInputStream(uri);
    BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
    onlyBoundsOptions.inJustDecodeBounds = true;
    onlyBoundsOptions.inDither = true;//optional
    onlyBoundsOptions.inPreferredConfig = Config.ARGB_8888;//optional
    BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
    input.close();//  w ww  .j av  a  2 s .c  o  m
    if ((onlyBoundsOptions.outWidth == -1) || (onlyBoundsOptions.outHeight == -1))
        return null;
    int originalSize = (onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth) ? onlyBoundsOptions.outHeight
            : onlyBoundsOptions.outWidth;
    double ratio = (originalSize > size) ? (originalSize / size) : 1.0;
    BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
    bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio);
    bitmapOptions.inDither = true;//optional
    bitmapOptions.inPreferredConfig = Config.ARGB_8888;//optional
    input = context.getContentResolver().openInputStream(uri);
    Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
    input.close();
    return bitmap;
}

---

From source file:Main.java

private static void saveSmallerImage(String pathOfInputImage, int dstWidth, int dstHeight) {
    try {/*w w w .j av  a 2  s  .  c  o m*/
        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());
    }
}

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From source file:Main.java

public static Bitmap revitionImageSize(String path, int width, int height) throws IOException {
    BufferedInputStream in = new BufferedInputStream(new FileInputStream(new File(path)));
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;//from   w w w  .  j  a v a2s.  co m
    BitmapFactory.decodeStream(in, null, options);
    in.close();
    int i = 0;
    Bitmap bitmap = null;
    while (true) {
        if ((options.outWidth >> i <= width) && (options.outHeight >> i <= height)) {
            in = new BufferedInputStream(new FileInputStream(new File(path)));
            options.inSampleSize = (int) Math.pow(2.0D, i);
            options.inJustDecodeBounds = false;
            bitmap = BitmapFactory.decodeStream(in, null, options);
            break;
        }
        i += 1;
    }
    return bitmap;
}

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From source file:Main.java

/**
 * decode the image bitmap according to specified size
 * //  w  w w  . jav  a  2 s . co m
 * @param f
 * @param maxSize
 * @return
 */
public static Bitmap decodeFile(File f, int maxSize) {
    Bitmap b = null;
    try {
        // Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;

        FileInputStream fis = new FileInputStream(f);
        BitmapFactory.decodeStream(fis, null, o);
        fis.close();

        int scale = 1;
        if (o.outHeight > maxSize || o.outWidth > maxSize) {
            scale = (int) Math.pow(2, (int) Math
                    .round(Math.log(maxSize / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
        }

        // Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        fis = new FileInputStream(f);
        b = BitmapFactory.decodeStream(fis, null, o2);
        fis.close();
    } catch (IOException e) {
    }
    return b;
}

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From source file:Main.java

public static Bitmap getSampledBitmap(Context context, String imagePath, boolean isDefault, int reqWidth,
        int reqHeight) {
    Bitmap sampledBitmap = null;/*from  w  w  w.  j a  va 2s .c  o  m*/
    InputStream inputStream = null;
    try {
        if (isDefault) {
            inputStream = context.getAssets().open(imagePath);
        } else {
            inputStream = new FileInputStream(imagePath);
        }
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(inputStream, null, options);
        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
        options.inJustDecodeBounds = false;
        if (!isDefault) {
            inputStream.close();
            inputStream = new FileInputStream(imagePath);
        }
        sampledBitmap = BitmapFactory.decodeStream(inputStream, null, options);
        //            inputStream.close();

    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return sampledBitmap;
}

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From source file:Main.java

/**
 * Tells the decoder to sub sample the image, loading a smaller version into memory.
 *
 * @param inputStream The stream containing the image to decode
 * @param reqWidth Required width of the final bitmap
 * @param reqHeight Required height of the final bitmap
 * @return Bitmap scaled to the required width and height
 *//*ww w.jav  a  2 s. co m*/
public static Bitmap decodeSampledBitmapFromStream(InputStream inputStream, int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(inputStream, null, options);

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

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeStream(inputStream, null, options);
}

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From source file:Main.java

public static Bitmap getCompressedBitmap(InputStream is, int sampleSize) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = sampleSize;/*from  w  ww.  j  a v a  2 s  .c om*/
    try {
        return BitmapFactory.decodeStream(is, null, options);
    } catch (OutOfMemoryError e) {
        Log.e("talktab.error", "OutOfMemoryError");
        options.inSampleSize = sampleSize * 2;
        return BitmapFactory.decodeStream(is, null, options);
    }
}

---

From source file:Main.java

/** Returns a Bitmap from the given URI that may be scaled by an integer factor to reduce its size,
 * while staying as least as large as the width and height parameters.
 *//*from w ww  . j  a va2  s.  c o m*/
public static Bitmap scaledBitmapFromURIWithMinimumSize(Context context, Uri imageURI, int width, int height)
        throws FileNotFoundException {
    BitmapFactory.Options options = computeBitmapSizeFromURI(context, imageURI);
    options.inJustDecodeBounds = false;

    float wratio = 1.0f * options.outWidth / width;
    float hratio = 1.0f * options.outHeight / height;
    options.inSampleSize = (int) Math.min(wratio, hratio);

    return BitmapFactory.decodeStream(context.getContentResolver().openInputStream(imageURI), null, options);
}

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