Android---Bitmap 与 String 互转

1. Bitmap 转 String 

    /*** 图片转字符串* @param bitmap 要转换的图片* @return 图片转换后的字符串*/public static String imageToBase64(Bitmap bitmap){ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);byte[] buffer = byteArrayOutputStream.toByteArray();return Base64.encodeToString(buffer, Base64.DEFAULT);}

2. String 转 Bitmap

    /*** 字符串转图片* @param bitmap64 要转换的字符串* @return 字符串转换后的图片*/public static Bitmap base64ToImage(String bitmap64){byte[] bytes = Base64.decode(bitmap64, Base64.DEFAULT);return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);}

3. 将一个 url 拆分为：base_url，relative_path，params三个部分

public class UrlUtil {private static final Map<String, String> params = new HashMap<>();public static Map<String, String> getUrlParams(String originalUrl){try {// 解析 URLURL url = new URL(originalUrl);// 获取 baseUrlString baseUrl = url.getProtocol() + ";//" + url.getHost();// 获取 相对路径String relativePath = url.getPath();// 获取参数String[] queryParams = url.getQuery().split("&");for (String queryParam : queryParams){String[] paramParts = queryParam.split("=");if (paramParts.length > 0){params.put(paramParts[0], paramParts[1]);}}}catch (Exception e){e.printStackTrace();}return params;}
}