如何使用Yandex翻译api有效地翻译数据库记录

Question

我正在创建一个Android应用程序，它使用Yandex翻译API将存储在数据库中的数据（由用户插入）转换为印地语。我正在使用AsynkTask从数据库中获取数据，然后进行api调用将其转换为hindi，然后将翻译后的文本存储到arrayList中，最后使用ListView和适配器显示列表。 当互联网连接速度很慢时，应用程序始终崩溃。此外，api调用数据库中的每条记录都不是一个好方法。任何人都可以告诉我如何改进我的代码或方法来构建我的应用程序。

代码是这样的：

private class TranslationAsyncTask extends AsyncTask<String, Void, ArrayList<String>> {

        @Override
       protected ArrayList<String> doInBackground(String... urls) {

        DiaryDbHelper mDbHelper = new    DiaryDbHelper(WelcomePageActivity.this);

        //get the database in readable mode
        SQLiteDatabase db = mDbHelper.getReadableDatabase();

        //use the query method on db object to retrieve data
        String[] projection = new String[]{DiaryEntry._ID, DiaryEntry.COLUMN_CONTENT};

        Cursor cursor = db.query(DiaryEntry.TABLE_NAME, projection, null, null, null, null, null);

        //create an array list of contents
        contentList = new ArrayList<String>();
        //if preffered language is Hindi
        //use yandexTranslate api
        SharedPreferences SP = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
        //String strUserName = SP.getString("username", "NA");
        // boolean bAppUpdates = SP.getBoolean("applicationUpdates",false);
        String lang_preffered = SP.getString("lang_preffered", "1");
        if (lang_preffered.equals("2")) {
            while (cursor.moveToNext()) {
                String translatedData = QueryUtils.fetchTranslatedData(urls[0] + "&lang=hi" + "&text=" + cursor.getString(1));
                //  contentList.add(cursor.getString(1));
                contentList.add(translatedData);
                Log.d("welcome", "displayDatabase: " + contentList.get(0));
            }
            cursor.close();
            return contentList;
        } else {
            while (cursor.moveToNext()) {
                //String translatedData = QueryUtils.fetchTranslatedData(urls[0]+cursor.getString(1));
                contentList.add(cursor.getString(1));
                // contentList.add(translatedData);
                Log.d("welcome", "displayDatabase: " + contentList.get(0));
            }
            cursor.close();
            return contentList;
        }

    }

    @Override
    protected void onPostExecute(ArrayList<String> translations) {
        //super.onPostExecute(earthquakes);
        UpdateUI(translations);
    }

    public void UpdateUI(ArrayList<String> translatedList) {

        // EarthQuakeAdapter itemsAdapter = new EarthQuakeAdapter(EarthquakeActivity.this,earthquakeList);
        ArrayAdapter<String> itemsAdapter = new ArrayAdapter<String>(WelcomePageActivity.this, R.layout.list_view, translatedList);
        ListView listview = (ListView) findViewById(R.id.list_view);
        listview.setAdapter(itemsAdapter);
    }
}