在Android中将JSON数据存储在移动缓存内存中

Question

我打开这个页面并与服务器同步，并显示从服务器返回的记录和数据。我想提高我的应用程序的性能。我是新的缓存内存，所以请帮助我或给我一些其他的想法，使我的应用程序更快。

class CreateNewProduct extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(Categry.this);
        pDialog.setMessage("Loading...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }
    protected String doInBackground(String... args) {

        List<NameValuePair> params = new ArrayList<NameValuePair>();
        JSONObject json = jParser.makeHttpRequest(url_search, "GET", params);
        Log.d("Search idioms: ", json.toString());
        try {
// Checking for SUCCESS TAG
            int success = json.getInt(TAG_SUCCESS);

             if (success == 1) {
// products found
// Getting Array of Products
            idioms = json.getJSONArray(TAG_IDIOMS);

// looping through All Products
            for (int i = 0; i < idioms.length(); i++) {
                JSONObject c = idioms.getJSONObject(i);

// Storing each json item in variable
                String id = c.getString(TAG_ID);
                String entry = c.getString(TAG_ENTRY);
                String meaning = c.getString(TAG_MEANING);

// creating new HashMap
                HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
                map.put(TAG_ID, id);
                map.put(TAG_ENTRY, entry);
                map.put(TAG_MEANING, meaning);
// adding HashList to ArrayList
                idiomsList.add(map);
               }
            } else {
// no idioms found
//do something
                //tv1.setVisibility(View.VISIBLE);
                //Toast.makeText(getBaseContext(), "NO data found", Toast.LENGTH_LONG).show();
            }
        }
        /*catch(Exception e){
            Log.e("log_tag", "Error in http connection"+e.toString());
            Toast.makeText(getBaseContext(), "NO data found", Toast.LENGTH_LONG).show();
        }*/
        catch (JSONException e) {
            Log.e("log_tag", "Error in http connection" + e.toString());
            Toast.makeText(getBaseContext(), "NO data found", Toast.LENGTH_LONG).show();
        }
        return null;
    }

    protected void onPostExecute(String file_url) {


            pDialog.dismiss();
            runOnUiThread(new Runnable() {
                public void run() {
/**
 * Updating parsed JSON data into ListView
 * */
                    ListAdapter adapter = new SimpleAdapter(
                            Categry.this, idiomsList,
                            R.layout.activity_list_child, new String[]{TAG_ID, TAG_ENTRY, TAG_MEANING},
                            new int[]{R.id.id, R.id.entry, R.id.meaning});

                    lv.setAdapter(adapter);
                }
            });

        }

    }

    @Override
    public void onBackPressed() {
        Intent intent = new Intent(getBaseContext(), homescreen.class);

        startActivity(intent);
        finish();
        //   overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_categry, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {
            case R.id.action_settings:
                Intent i = new Intent(getBaseContext(), qrcode.class);
                startActivity(i);
                return true;
            case android.R.id.home:
                Intent intent = new Intent(getBaseContext(), homescreen.class);
                startActivity(intent);
                finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Answer 1

如果您完全和完整地处理json，并使应用程序更加流畅，就可以使用称为改造的库，它非常简单，很容易与您的json集成，那么您可以将它存储为一个json文件，以便进行脱机访问。