android中Bitmap的放大和缩小实例代码

/**bitmap放大的方法*/
private static bitmap big(bitmap bitmap) {
matrix matrix = new matrix();
matrix.postscale(1.5f,1.5f); //长和宽放大缩小的比例
bitmap resizebmp = bitmap.createbitmap(bitmap,0,0,bitmap.getwidth(),bitmap.getheight(),matrix,true);
return resizebmp;
}
/**bitmap缩小的方法*/
private static bitmap small(bitmap bitmap) {
matrix matrix = new matrix();
matrix.postscale(0.8f,0.8f); //长和宽放大缩小的比例
bitmap resizebmp = bitmap.createbitmap(bitmap,0,0,bitmap.getwidth(),bitmap.getheight(),matrix,true);
return resizebmp;
}