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

/**
 * Returns a BitmapFactory.Options object containing the size of the image at the given URI,
 * without actually loading the image.//from  w  ww . ja v  a  2 s  . com
 */
public static BitmapFactory.Options computeBitmapSizeFromURI(Context context, Uri imageURI)
        throws FileNotFoundException {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    Bitmap bitmap = BitmapFactory.decodeStream(context.getContentResolver().openInputStream(imageURI), null,
            options);
    if (bitmap != null) {
        bitmap.recycle();
    }
    return options;
}

From source file:Main.java

public static Point getImageDimensions(File f) throws FileNotFoundException {
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;/*from   w  w  w .  j  a v  a2  s .c  o  m*/
    BitmapFactory.decodeStream(new FileInputStream(f), null, o);
    return new Point(o.outWidth, o.outHeight);
}

From source file:Main.java

/**
 * Returns a mutable bitmap from a uri.//  w  w  w.  j av a  2  s  .  c  o  m
 *
 * @param uri Uri to the file
 * @return A mutable copy of the decoded {@link android.graphics.Bitmap}; null if failed.
 * @throws java.io.IOException if unable to make it mutable
 */
public static Bitmap decodeUri(final ContentResolver resolver, final Uri uri) throws IOException {
    BitmapFactory.Options opt = new BitmapFactory.Options();
    opt.inJustDecodeBounds = false;
    opt.inMutable = true;
    return BitmapFactory.decodeStream(resolver.openInputStream(uri), null, opt);
}

From source file:Main.java

/**
 * Returns the bitmap from the given uri loaded using the given options.
 * Returns null on failure./* www.j a v  a 2 s .c  o m*/
 */
public static Bitmap loadBitmap(Context context, InputStream is, BitmapFactory.Options o) {
    try {
        return BitmapFactory.decodeStream(is, null, o);
    } finally {
        closeSilently(is);
    }
}

From source file:Main.java

public static Bitmap loadBitmapDirectStream(String url, BitmapFactory.Options opt) {
    Bitmap bitmap = null;//from www .  j av a2 s  .co  m
    InputStream is = null;
    try {
        is = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
        bitmap = BitmapFactory.decodeStream(is, null, opt);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        Log.e(TAG, "IOException in loadBitmap");
        e.printStackTrace();
    } catch (OutOfMemoryError e) {
        // TODO Auto-generated catch block
        Log.e(TAG, "OutOfMemoryError in loadBitmap");
        e.printStackTrace();
    } finally {
        closeStream(is);
    }
    return bitmap;
}

From source file:Main.java

public static Bitmap compressImage(Bitmap image) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    int options = 100;
    while (baos.toByteArray().length / 1024 > 100) {
        options -= 10;/*from   w ww .j  a va 2  s.  c  o  m*/
        if (options > 0) {
            baos.reset();
            image.compress(Bitmap.CompressFormat.JPEG, options, baos);
        }
    }
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
    return BitmapFactory.decodeStream(isBm, null, null);
}

From source file:Main.java

/**
 * @param url//from w w  w.j a v  a  2 s  . c  o m
 * @param sampleSize
 * @return
 * @throws FileNotFoundException
 * @throws IOException
 */
public static Bitmap downsampleBitmap(URL url, int sampleSize) throws FileNotFoundException, IOException {
    Bitmap resizedBitmap;
    BitmapFactory.Options outBitmap = new BitmapFactory.Options();
    outBitmap.inJustDecodeBounds = false; // the decoder will return a bitmap
    outBitmap.inSampleSize = sampleSize;

    InputStream is = url.openStream();
    resizedBitmap = BitmapFactory.decodeStream(is, null, outBitmap);
    is.close();

    return resizedBitmap;
}

From source file:Main.java

/**
 * Converts an inputstream into a bitmap using the BITMAP_SAMPLE_SIZE;
 * @param in the inputstream containing a bitmap
 * @return the bitmap//  w  w  w  .  j av  a 2  s. c o  m
 */
public static Bitmap convertBitmap(InputStream in, int sampleSize) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = sampleSize;
    return BitmapFactory.decodeStream(in, null, options);
}

From source file:Main.java

public static Bitmap compressBmpFromBmp(Bitmap image) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    int options = 100;
    image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    while (baos.toByteArray().length / 1024 > 100) {
        baos.reset();/*from ww w.  j  a  v  a2s .co m*/
        options -= 10;
        image.compress(Bitmap.CompressFormat.JPEG, options, baos);
    }
    ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
    Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);
    return bitmap;
}

From source file:Main.java

public static boolean rotateBitmap(File inFile, File outFile, int angle)
        throws FileNotFoundException, IOException {
    // Declare//from   w  w w  .  ja v a 2 s  .  c  om
    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;
}