/*** 文件转base64字符串** @param file* @return*/
public static String fileToBase64(File file) {String base64 = null;InputStream in = null;try {in = new FileInputStream(file);byte[] bytes = new byte[in.available()];int length = in.read(bytes);base64 = Base64.encodeToString(bytes, 0, length, Base64.DEFAULT);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {try {if (in != null) {in.close();}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return base64;
}

方法2：

String base64Img = "";
try {byte[] buf = readFile(file);base64Img = new String(Base64.encode(buf, Base64.NO_WRAP));} catch (Exception e) {e.printStackTrace();
}

json文件转对象

public static String readStringFromFile(String fileName) {InputStream is = null;String msg = null;try {File file = new File(fileName);if(file.exists()){is = new FileInputStream(fileName);byte[] bytes = new byte[is.available()];is.read(bytes);msg = new String(bytes);}} catch (IOException e) {e.printStackTrace();} finally {try {if (is != null){is.close();}} catch (IOException e) {e.printStackTrace();}}return msg;
}

 

public static DynamicLangBean loadDownLang(Context context, String lang){DynamicLangBean langBean = null;String filePathStr = getLangDownFileDir(context) + File.separator + getLangDownFileName(lang);String strContent = LangFileUtil.readStringFromFile(filePathStr);if (TextUtils.isEmpty(strContent)){return langBean;}try{langBean = new Gson().fromJson(strContent, DynamicLangBean.class);}catch (Exception e){e.printStackTrace();AppLog.Loge("语言包加载异常："+e.getMessage());}return langBean;}