Question

I have an image with different frame to be displayed, like the following:

As you can see that image has three frames, the full heart, half heart and empty space.

Now i need to only one frame of the three. I’m just wondering if there is a method to do that using a single gif in android sdk.
For example in several language there is a method like:

canvas.drawImage(xpos,ypos,xwidth,xheight,gifx,gify,gifwidth,gifheight)

where gifx,gify,gifwidth,gifheight are the coordinates and size of the selected frame.

Answer 1

Ok i answer myself, i just found a solution.

In order to draw a multiframe image the following method can be used:

public void drawBitmap (Bitmap bitmap, Rect src, RectF dst, Paint paint)

Where:

• Bitmap bitamp is the Bitmap resource obtained with BitmapFactory.decodeResource (or via your preferred method).
• Rect src is the frame to be shown (it can be null)
• Rect dst rhe rectangle that the bitmap will be scaled/translated to fit into (it can be null)
• Paint paint used to draw the bitmap (it can be null)

Another way (that i didn’t tested) could be using BitmapRegionDecoder first of all a new instance of the object must be created using BitmapRegionDecoder.newInstance(…)
and then the selected region of bitmap to be shown could be obtained with the method:

public Bitmap decodeRegion (Rect rect, BitmapFactory.Options options)

Where rect is the selected region to be shown. For more info on BitmapRegionDecoder:
http://developer.android.com/reference/android/graphics/BitmapRegionDecoder.html