Android圖片轉爲16進制

package pts.tanlian.namespace.control;


import java.io.ByteArrayOutputStream;


import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.widget.ImageView;


public class ImageToString {


/**
* 將圖片轉換成十六進制字符串
* @param photo
* @return
*/
public static String sendPhoto(ImageView photo) {
Drawable d = photo.getDrawable();
Bitmap bitmap=((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);// (0 - 100)壓縮文件
byte[] bt = stream.toByteArray();
String photoStr = byte2hex(bt);
return photoStr;


}
/**
* 二進制轉字符串
* @param b
* @return
*/
public static String byte2hex(byte[] b)  
{
StringBuffer sb = new StringBuffer();
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = Integer.toHexString(b[n] & 0XFF);
if (stmp.length() == 1) {
sb.append("0" + stmp);
} else {
sb.append(stmp);
}


}
return sb.toString();
}
}