将json数据写入并读取到内部存储android [英] Write and Read a json data to internal storage android

问题描述

我有一个从php收到的json数组

I have a json array received from php

[  
   {  
      "name":"Daniel Bryan",
      "img":"pictures\/smallest\/dierdrepic.jpg",
      "username":"@dbryan",
      "user_id":"4"
   },
   {  
      "name":"Devil Hacker",
      "img":"pictures\/smallest\/belitapic.jpg",
      "username":"@dvHack",
      "user_id":"1"
   }
]

• 我想要的是在 file_name.anyextension 中写这些数据
  我的应用数据文件夹或任何安全的地方。


• 还从 file_name.anyextension 中读取此数据并将其转换为
  有效 json数组可以进一步编辑。


• What i want is to write this data in a file_name.anyextension in my apps data folder or anywhere safe.
• Also read this data from file_name.anyextension and convert it to a valid json array that can be further edited.

任何人都可以告诉我一个方法我怎么可能这件事？

Can anyone show me a way how can i possibly to this thing ?

推荐答案

private void writeToFile(String data) {
    try {
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(openFileOutput("config.txt", Context.MODE_PRIVATE));
        outputStreamWriter.write(data);
        outputStreamWriter.close();
    }
    catch (IOException e) {
        Log.e("Exception", "File write failed: " + e.toString());
    } 
}


private String readFromFile() {

    String ret = "";

    try {
        InputStream inputStream = context.openFileInput("config.txt");

        if ( inputStream != null ) {
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String receiveString = "";
            StringBuilder stringBuilder = new StringBuilder();

            while ( (receiveString = bufferedReader.readLine()) != null ) {
                stringBuilder.append(receiveString);
            }

            inputStream.close();
            ret = stringBuilder.toString();
        }
    }
    catch (FileNotFoundException e) {
        Log.e("login activity", "File not found: " + e.toString());
    } catch (IOException e) {
        Log.e("login activity", "Can not read file: " + e.toString());
    }

    return ret;
}

从文件读取字符串时将其转换为JsonObject或JsonArray

When read string from file convert it to JsonObject or JsonArray

JSONArray jarray = new JSONArray(str);

这篇关于将json数据写入并读取到内部存储android的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！