com.loadsensing.app.SensorsActivity.java Source code

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Here is the source code for com.loadsensing.app.SensorsActivity.java

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/***
 * Copyright (c) 2012 David Garcia / Jose Antonio Gmez
 * mastersofandroid@gmail.com
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package com.loadsensing.app;

import java.util.ArrayList;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import com.loadsensing.client.JsonClient;

public class SensorsActivity extends ListActivity {
    /** Called when the activity is first created. */

    private static final String DEB_TAG = "LoadSensingApp_LOG";
    private String SERVER_HOST = "http://viuterrassa/Android/getLlistaSensors.php";
    ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
    HashMap<String, String> sensors = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sensor_list_view);

        // Get Intent parameters
        String XarxaSelected = "";
        Bundle extras = null;
        if (savedInstanceState == null) {
            extras = getIntent().getExtras();
            if (extras == null) {
                XarxaSelected = null;
            } else {
                XarxaSelected = extras.getString("idxarxaselected");
            }
        } else {
            XarxaSelected = (String) savedInstanceState.getSerializable("XarxaSelected");
        }
        // adapter que mapeja la informaci del sensor amb els camps del layout
        SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.sensor_row_list_view,
                new String[] { "id", "sensor", "tipus", "descripcio", "poblacio", "canal" },
                new int[] { R.id.text1, R.id.text2, R.id.text3, R.id.text4, R.id.text5, R.id.text6 });

        SharedPreferences settings = getSharedPreferences("LoadSensingApp", Context.MODE_PRIVATE);
        String address = SERVER_HOST + "?IdXarxa=" + XarxaSelected + "&session="
                + settings.getString("session", "");
        Log.d(DEB_TAG, "Requesting to " + address);

        try {
            String jsonString = JsonClient.connectString(address);

            // Convertim la resposta string a un JSONArray
            JSONArray llistaSensorsArray = new JSONArray(jsonString);

            for (int i = 0; i < llistaSensorsArray.length(); i++) {
                JSONObject xarxaJSON = llistaSensorsArray.getJSONObject(i);
                sensors = new HashMap<String, String>();
                sensors.put("id", xarxaJSON.getString("id"));
                sensors.put("sensor", xarxaJSON.getString("sensor"));
                sensors.put("canal", xarxaJSON.getString("canal"));
                sensors.put("tipus", xarxaJSON.getString("tipus"));
                sensors.put("descripcio", xarxaJSON.getString("Descripcio"));
                sensors.put("poblacio", xarxaJSON.getString("Poblacio"));

                list.add(sensors);
            }

            setListAdapter(adapter);

        } catch (Exception ex) {
        }
    }

    protected void onListItemClick(ListView l, View v, int position, long id) {
        // obtenim l'id del sensor i obrim la nova pantalla de la informaci del sensor
        TextView c = (TextView) v.findViewById(R.id.text1);
        String idsensorselected = c.getText().toString();
        Log.d(DEB_TAG, "idsensorselected: " + c.getText().toString());

        Intent intent = new Intent();
        intent.setClass(this.getApplicationContext(), SingleSensorActivity.class);
        intent.putExtra("idsensorselected", idsensorselected);
        startActivity(intent);

    }

    public void goBack(View v) {
        finish();
    }

    public void onClickHome(View v) {
        goHome(this);
    }

    public void goHome(Context context) {
        final Intent intent = new Intent(context, HomeActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        context.startActivity(intent);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
        case R.id.logout:
            SharedPreferences settings = getSharedPreferences("LoadSensingApp", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("session", "");
            editor.commit();
            Log.d(DEB_TAG, "SharedPreferences. Session restarted.");
            startActivity(new Intent(getApplicationContext(), LoginActivity.class));
            this.finish();
            return true;
        case R.id.preferences:
            startActivity(new Intent(getApplicationContext(), Preferences.class));
            return true;
        case R.id.exit:
            moveTaskToBack(true);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }
}