如何在Android中从文件读取/写入字符串

希望这对你有用。

写文件：

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

读取文件：

private String readFromFile(Context context) {    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("n").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;}