图片转为String传个给服务端
上传头像等图片比较简单的一种就是直接把图片--- >String 再作为参数post给服务端
之所以用post是因为string都会很长~
下面见代码
[java]
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 60, stream);
byte[] b = stream.toByteArray();
// 将图片流以字符串形式存储下来
String tp = new String(Base64Coder.encodeLines(b));//tp 就是最终的参数
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
为了检验本地可以尝试把string - 〉图片
[java]
byte[] tempb = Base64Coder.decode(tp);
Bitmap bitmap = BitmapFactory.decodeByteArray(tempb, 0, tempb.length);
ImageVIew.setImageBitmap(bitmap);
另外这个方法用到两个java类在下面
[java]
import java.io.IOException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
public class Base64 {
/** prevents anyone from instantiating this class */
private Base64() {
}
/**
* This character array provides the alphabet map from RFC1521.
*/
private final static char ALPHABET[] = {
// 0 1 2 3 4 5 6 7
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', // 0
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 1
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 2
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', // 3
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 4
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', // 5
'w', 'x', 'y', 'z', '0', '1', '2', '3', // 6
'4', '5', '6', '7', '8', '9', '+', '/' // 7
};
/**
* Decodes a 7 bit Base64 character into its binary value.
*/
private static int valueDecoding[] = new int[128];
/**
* initializes the value decoding array from the character map
*/
static {
for (int i = 0; i < valueDecoding.length; i++) {
valueDecoding[i] = -1;
}
for (int i = 0; i < ALPHABET.length; i++) {
valueDecoding[ALPHABET[i]] = i;
}
}
/**
* Converts a byte array into a Base64 encoded string.
*
* @param data
* bytes to encode
* @param offset
* which byte to start at
* @param length
* how many bytes to encode; padding will be added if needed
* @return base64 encoding of data; 4 chars for every 3 bytes
*/
public static String encode(byte[] data, int offset, int length) {
int i;
int encodedLen;
char[] encoded;
// 4 chars for 3 bytes, run input up to a multiple of 3
encodedLen = (length + 2) / 3 * 4;
encoded = new char[encodedLen];
for (i = 0, encodedLen = 0; encodedLen < encoded.length; i += 3, encodedLen += 4) {
encodeQuantum(data, offset + i, length - i, encoded, encodedLen);
}
return new String(encoded);
}
/**
* Encodes 1, 2, or 3 bytes of data as 4 Base64 chars.
*
* @param in
* buffer of bytes to encode
* @param inOffset
* where the first byte to encode is
* @param len
* how many bytes to encode
* @param out
* buffer to put the output in
* @param outOffset
* where in the output buffer to put the chars
*/
private static void encodeQuantum(byte in[], int inOffset, int len,
char out[], int outOffset) {
补充：软件开发 , Java ,
