Question

我有一个AsyncTask将文件下载到我的Android应用程序的内部存储中。我想稍后阅读这个文件，但我不知道怎么能这样做。这是我的AsyncTask代码：

private class GetFile  extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(ComprobadorDos.this);
            pDialog.setMessage("Por favor espere...");
            pDialog.setCancelable(false);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {

            try {


                    File fileEvents = new File(context.getFilesDir().getAbsolutePath() + "/agenda_hoy.json");

                    if (fileEvents.exists()) {
                        fileEvents.delete();
                    }

                    String buffer;
                    URLConnection conn = new URL(CALLBACK_URL).openConnection();
                    conn.setUseCaches(false);
                    conn.connect();
                    InputStreamReader isr = new InputStreamReader(conn.getInputStream());
                    BufferedReader br = new BufferedReader(isr);

                    FileOutputStream fos = context.openFileOutput("agenda_hoy.json", Context.MODE_PRIVATE);

                    while ((buffer = br.readLine()) != null) {
                        fos.write(buffer.getBytes());
                    }

                    fos.close();
                    br.close();
                    isr.close();




            } catch (Exception e) {
                Log.d(LOG_TAG, e.getMessage());
            }

            return null;
        }


        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();

        }


    }

我希望这是一个很好的代码，如果有人知道更好的做法，请告诉我该怎么做。

Answer 1

    //Get the text file
    File fileEvents = new File(context.getFilesDir().getAbsolutePath() + "/agenda_hoy.json");

    //Read text from file
    StringBuilder text = new StringBuilder();

    try {
        BufferedReader br = new BufferedReader(new FileReader(fileEvents));
        String line;

        while ((line = br.readLine()) != null) {
            text.append(line);
            text.append('\n');
        }
        br.close();
    }
    catch (IOException e) {
        //You'll need to add proper error handling here
    }

//you now have the file content in the text variable and you can use it 
//based on you needs
Log.d("MYAPP",text.toString());

从内部存储中读取文件

1 个答案: