Question

Android如何最优化的读取一张Bitmap

Answer 1

全白Java code int[] pix = new int[picw * pich];

for (int y = 0; y < pich; y++)
for (int x = 0; x < picw; x++)
{
int index = y * picw + x;
int r = ((pix[index] >> 16) & 0xff)|0xff;
int g = ((pix[index] >> 8) & 0xff)|0xff;
int b =( pix[index] & 0xff)|0xff;
pix[index] = 0xff000000 | (r << 16) | (g << 8) | b;

}
bm1.setPixels(pix, 0, picw, 0, 0, picw, pich);
BitmapDrawable bmp11=new BitmapDrawable(bm1);

Answer 2

public static byte[] bitmapToByte(Bitmap bitmap) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
return os.toByteArray();
}

Answer 3

点击链接http://blog.sina.com.cn/s/blog_716db70f0101eht7.html