复制代码 代码如下:

// zoom 放缩 
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { 
    int width = bitmap.getWidth(); 
    int height = bitmap.getHeight(); 
    Matrix matrix = new Matrix(); 

    float scaleWidth = w / (float) width; 
    float scaleHeight = h / (float) height; 
    matrix.postScale(scaleWidth, scaleHeight); 

    Bitmap bitmap2 = Bitmap.createBitmap(bitmap, 0, 0, width, height, 
            matrix, true); 
    return bitmap2; 
}