我有一个从 php 接收到的 json 数组
[
{
"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"
}
]
- 我想要的是将此数据写入到
file_name.anyextension
中 我的应用程序数据文件夹或任何安全的地方。 - 同时从
file_name.anyextension
中读取数据并将其转换为 可以进一步编辑的有效json 数组
。
任何人都可以告诉我如何才能做到这一点吗?
最佳答案
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;
}
当从文件中读取字符串时,将其转换为 JsonObject 或 JsonArray
JSONArray jarray = new JSONArray(str);
关于java - 将 json 数据写入和读取到内部存储 android,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28646757/