Question

我将BLQ从SQite转换为String，我想将该字符串转换为byteArray但不起作用。请帮帮我。

将BLOb转换为ArrayList HashMap上的字符串：

    if (cursor.moveToFirst()) {
        do {
            HashMap<String, String> user = new HashMap<String, String>();
            user.put("username" , cursor.getString(9));
            user.put("photo" , cursor.getBlob(10).toString());
            ImageList.add(user);
        } while (cursor.moveToNext());
    }

使用以下代码，我无法将上面的字符串转换为ByteArray，当我运行时，我在ImageView上什么也得不到：

    ArrayList<HashMap<String, String>> photoList;
    photoList = db.getString();
    HashMap<String, String> hashmap= photoList.get(0);

    String photo_name = hashmap.get("photo");
    byte[] byteArray = photo_name.getBytes();

    Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
    imageview.setImageBitmap(bmp);

Answer 1

public class ConvertStringIntoBytes{

public void convertStringToByteArray() {
    String stringToConvert = "This is test string";
    byte[] theByteArray = stringToConvert.getBytes();
    System.out.println(theByteArray.length);
}

public static void main(String[] args) {
    new Main().convertStringToByteArray();
    }
}

将字符串转换为字节数组的代码。

当字符串来自BLOB时，如何将字符串转换为byteArray？

1 个答案: