java - how to crop using the rect values? in android -

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Hello, I currently am working on a project, I have rectangle values ​​top, left, bottom, right now I want to crop the part, I will use for the crop by a new bitmap the code 

  createBitmap (bitmap source, int x, int y, int width, int height, Matrix m, boolean filter)

But the problem is, I do not know how to get the x and y coordinates of the rectangle, matrix and Boolean filter also? , Please thank me

java

android


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