Question

如何在Android设备中保存来自parse.com的数据？

我正在尝试将数据保存在应用程序中的某个位置，当您没有网络时，客户仍然可以将数据保存在设备上。

我正在使用此代码制作列表并且正在运行，只是在没有互联网时忽略了保存数据的问题。

package com.example.ronysueliton.patospizzas;

import android.app.ActionBar;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;

/**
 * Created by Rony Sueliton on 11/04/2015.
 */
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;

import com.parse.FindCallback;
import com.parse.GetCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;

public class Pizzarias extends ActionBarActivity {

 // Declare Variables
 Boolean bColorStatus = true;
 TextView status;
 ListView listview;
 List<ParseObject> ob;

 ProgressDialog mProgressDialog;
 ListViewAdapterPizzarias adapter;
 private List<WorldPopulation> worldpopulationlist = null;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_pizzarias);

 new RemoteDataTask().execute();

 }

 @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_pizzarias, menu);

 //Os metodos abaixo são para mostrar o icone do aplicativo na action bar
 getSupportActionBar().setDisplayShowHomeEnabled(true);
 getSupportActionBar().setLogo(R.drawable.ic_launcher);
 getSupportActionBar().setDisplayUseLogoEnabled(true);

 return true;
 }


 /*@Override
 public boolean onOptionsItemSelected(MenuItem item) {
 onBackPressed();
 return true;
 }*/

 //RemoteDataTask AsyncTask
 private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
 @Override
 protected void onPreExecute() {
 super.onPreExecute();
 // Create a progressdialog
 mProgressDialog = new ProgressDialog(Pizzarias.this);
 // Set progressdialog title
 mProgressDialog.setTitle("Carregando Pizzarias");
 // Set progressdialog message
 mProgressDialog.setMessage("Aguarde...");
 mProgressDialog.setIndeterminate(false);
 // Show progressdialog
 mProgressDialog.show();
 }

 @Override
 protected Void doInBackground(Void... params) {
 // Create the array
 worldpopulationlist = new ArrayList<WorldPopulation>();

 try {
 // Locate the class table named "Country" in Parse.com
 ParseQuery query = new ParseQuery("GerenciarPizzariasPatos");

 // Locate the column named "ranknum" in Parse.com and order list
 // by ascending,

 query.orderByAscending("nome");

 ob = query.find();
 for (ParseObject country : ob) {
 WorldPopulation map = new WorldPopulation();
 map.setNome((String) country.get("nome"));
 map.setEndereco((String) country.get("endereco"));
 map.setTelefone((String) country.get("telefone"));
 map.setStatus((String) country.get("status"));
 worldpopulationlist.add(map);
 }
 } catch (ParseException e) {
 Log.e("Error", e.getMessage());
 e.printStackTrace();
 }
 return null;
 }

 @Override
 protected void onPostExecute(Void result) {
 // Locate the listview in listview_main.xml
 listview = (ListView) findViewById(R.id.listviewpizzarias);
 // Pass the results into ListViewAdapter.java
 adapter = new ListViewAdapterPizzarias(Pizzarias.this,
 worldpopulationlist);
 // Binds the Adapter to the ListView
 listview.setAdapter(adapter);
 // Close the progressdialog
 mProgressDialog.dismiss();
 }
 }
}

////

public class ParseApplication extends Application {


    @Override
    public void onCreate() {
        super.onCreate();

        Parse.enableLocalDatastore(this);

        // Add your initialization code here
        Parse.initialize(this, "xxx", "xxx");

        ParseUser.enableAutomaticUser();
        ParseACL defaultACL = new ParseACL();

        // If you would like all objects to be private by default, remove this
        // line.
        defaultACL.setPublicReadAccess(true);

        ParseACL.setDefaultACL(defaultACL, true);
    }

}

Answer 1

Just add <?php $db_host = 'localhost'; $db_user = 'root'; $db_pass = 'root'; $db_database = 'drmahima_com'; $link = mysqli_connect($db_host,$db_user,$db_pass,$db_database) or die('Unable to establish a DB connection'); mysqli_query($link, "SET names UTF8"); // function temp() { $patient = mysqli_fetch_assoc(mysqli_query($link, "SELECT name,dob FROM patients WHERE id='69'")); echo $patient['name']; // } // temp(); ?> after DGTSession and add to logic that will check whether connection is available and would enable pin(map); option in case of unavailable connection before executing query

Answer 2

我改变了我的代码行，我尝试使用互联网parse.com博客的教程，但是给出了错误GET，用红线加下划线。

我尝试使用网站示例：http://blog.parse.com/announcements/take-your-app-offline-with-parse-local-datastore/

@Override
    protected Void doInBackground(Void... params) {
        // Create the array
        worldpopulationlist = new ArrayList<WorldPopulation>();


        try {
            // Locate the class table named "Country" in Parse.com
            //ParseQuery query = new ParseQuery("GerenciarPizzariasPatos");
            String objectId = "GFiBnjCE4v";
            ParseObject feed = ParseQuery.get(objectId); // error GET // Online ParseQuery result
            feed.fetch();
            feed.put("fechado", true);
            feed.saveEventually();

            //ParseQuery<ParseObject> query = ParseQuery.getQuery("GerenciarPizzariasPatos");
            ParseQuery<ParseObject> query = ParseQuery.get("GerenciarPizzariasPatos") // error GET 
                    .fromLocalDatastore()
                    .whereEquals("fechado", true)
                    .findInBackground(new FindCallback<ParseObject>() {
                        public void done(List<ParseObject> objects, ParseException e) {
                            // "feed" ParseObject will be returned in the list of results
                        }
                    });

            // Locate the column named "ranknum" in Parse.com and order list
            // by ascending,

            query.orderByAscending("nome");

            ob = query.find();
            for (ParseObject country : ob) {
                WorldPopulation map = new WorldPopulation();
                map.setNome((String) country.get("nome"));
                map.setEndereco((String) country.get("endereco"));
                map.setTelefone((String) country.get("telefone"));
                map.setStatus((String) country.get("status"));
                worldpopulationlist.add(map);

            }
        } catch (ParseException e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
        return null;
    }

将从站点parse.com收到的数据保存在设备上

2 个答案: