android 读取properties乱码,android studio开发

/**
* 读取assets目录下properties文件，去key对应值
* @param context
* @param fileName
* @param key
* @return
*/
public static String getAssetFilePropertyValue(Context context,String fileName,String key){
if(context ==null || fileName == null || key == null || key.equals("")) return "";
Properties p = new Properties();
InputStream in = null;
try {
AssetManager assetManager = context.getResources().getAssets();
in = assetManager.open(fileName,AssetManager.ACCESS_BUFFER);
p.load(in);
String result  = p.getProperty(key);
if(result != null && !result.equals("")){
result=new String(result.getBytes("ISO-8859-1"), "utf-8");
}
return result;
} catch (IOException e) {
e.printStackTrace();
} finally {
if(in!=null){
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}