Android Utililty Methods Bitmap Create

List of utility methods to do Bitmap Create

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Description

The list of methods to do Bitmap Create are organized into topic(s).

Method

BufferedImagecreateCompatibleImage(int width, int height)
create Compatible Image 
return getGraphicsConfiguration().createCompatibleImage(width,
        height);
BufferedImagecreateCompatibleImage(BufferedImage image, int width, int height)
create Compatible Image 
return getGraphicsConfiguration().createCompatibleImage(width,
        height, image.getTransparency());
BitmapgetBitMapFromStream(String filename)
get Bit Map From Stream 
Bitmap bitmap = null;
try {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = false;
    bitmap = BitmapFactory.decodeFile(filename, options);
    System.gc();
    return bitmap;
} catch (Exception ex) {
...
BitmapgetBitmap(int resId, Context ctx)
get Bitmap 
int mLargeIconWidth = (int) ctx.getResources().getDimension(
        android.R.dimen.notification_large_icon_width);
int mLargeIconHeight = (int) ctx.getResources().getDimension(
        android.R.dimen.notification_large_icon_height);
Drawable d = ctx.getResources().getDrawable(resId);
Bitmap b = Bitmap.createBitmap(mLargeIconWidth, mLargeIconHeight,
        Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
...
BitmapgetBitmapFromImageView(ImageView theImage)
get Bitmap From Image View 
return ((BitmapDrawable) theImage.getDrawable()).getBitmap();
BitmapgetBitmapFromResource(Resources resources, int resourceId, int reqWidth, int reqHeight)
get Bitmap From Resource 
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(resources, resourceId, options);
options.inSampleSize = calculateInSampleSize(options, reqWidth,
        reqHeight);
options.inJustDecodeBounds = false;
Bitmap image = BitmapFactory.decodeResource(resources, resourceId,
        options);
...
BitmapgetBitmapFromURI(Context context, Uri uri)
get Bitmap From URI 
try {
    Bitmap bitmap = MediaStore.Images.Media.getBitmap(
            context.getContentResolver(), uri);
    return bitmap;
} catch (IOException e) {
    throw new IllegalArgumentException(
            "Error creating bitmap from URI");
BitmapgetBackground(int bgcolor)
Helper to create a bitmap to set as imageview or bg 
try {
    Bitmap.Config config = Bitmap.Config.ARGB_8888;
    Bitmap bitmap = Bitmap.createBitmap(2, 2, config);
    Canvas canvas = new Canvas(bitmap);
    canvas.drawColor(bgcolor);
    return bitmap;
} catch (Exception e) {
    return null;
...
BitmapmakeBitmap(int minSideLength, int maxNumOfPixels, Uri uri, ContentResolver cr, ParcelFileDescriptor pfd, BitmapFactory.Options options)
Make a bitmap from a given Uri, minimal side length, and maximum number of pixels. 
Bitmap b = null;
try {
    if (pfd == null)
        pfd = makeInputStream(uri, cr);
    if (pfd == null)
        return null;
    if (options == null)
        options = new BitmapFactory.Options();
...
BitmapgenerateBitmap(int width, int height)
generate Bitmap 
Bitmap bitmap = Bitmap.createBitmap(width, height,
        Bitmap.Config.ARGB_8888);
int t = (int) (255.0 * Math.random());
int r = (int) (255.0 * Math.random());
int g = (int) (255.0 * Math.random());
int b = (int) (255.0 * Math.random());
int offset1 = (int) (255 * Math.random());
int offset2 = (int) (255 * Math.random());
...