Return a Resources instance for your application‘s package.
BitmapFactory extends Object java.lang.Object ? android.graphics.BitmapFactory Class Overview -------------------------------------------------------------------------------- Creates Bitmap objects from various sources, including files, streams, and byte-arrays.
public void translate (float dx, float dy) Added in API level 1 Preconcat the current matrix with the specified translation When working with matrices, the word concatenation refers to multiplication. Since matrix multiplication is not commutative, there is a separate word for backwards multiplication. Pre-concatenating a to b means setting a = b × a. (As opposed to a = a × b, which will give a different matrix) The canvas maintains a matrix and the canvas is manipulated by methods which are well defined in OpenGL
原文：http://www.cnblogs.com/hixin/p/4154688.html