load a bitmap from the drawable folder If we need to resize a Bitmap, we can call the createScaledBitmap method to resize any bitmap to our desired width and height:
#HOW TO OPEN BITMAP IMAGE HOW TO#
If you want get Bitmap from gallery or camera read How to get image from Gallery or Camera on Android.
To convert a Bitmap object into a Drawable you can use the following code.ĭrawable d = new BitmapDrawable(getResources(), bitmap) ImageView image = (ImageView) findViewById(R.id.image) īitmap b = codeResource(getResources(), R.drawable.car) You can get Bitmap from Drawables via following code. The alpha channel lets you set an opacity.
#HOW TO OPEN BITMAP IMAGE 32 BIT#
As four eights are 32 this is 32 bit graphics. The specification ARGB_8888 means create a pixel with four channels ARGB - Alpha, Red, Green, Blue and allocate each 8 bits of storage. This is where things can get complicated. The third parameter specifies the type of pixel you want to use.
The first two parameters give the width and the height in pixels. Each pixel can be set to a given color but exactly what color depends on the type of the pixel. In this instance we will simply create a Bitmap directly:īitmap b = Bitmap.createBitmap(100, 100, _8888) Ī bitmap is simply a rectangle of pixels. In a standard bitmap image, each dot can be assigned a different color. When viewed at 100%, each dot corresponds to an individual pixel on a display. How to work with Bitmap in Android Android Ī bitmap (or raster graphic) is a digital image composed of a matrix of dots.
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