org.happyemi.friendlypi.ModlistActivity.java Source code

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Here is the source code for org.happyemi.friendlypi.ModlistActivity.java

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/*
   Copyright 2013-2014 Emiliano Mennucci
    
 This file is part of FriendlyPi.
    
 FriendlyPi is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 FriendlyPi is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with FriendlyPi.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.happyemi.friendlypi;

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.MenuItem;

import android.widget.*;
import java.util.*;

import org.json.*;

public class ModlistActivity extends Activity implements StatusChangeListener {
    private ArrayList<ModItem> items = new ArrayList<ModItem>();
    private ModItemAdapter adapter;
    private Handler handler = new Handler();

    // Fetches system status every 5 secs.
    private class FetchStatusTimer implements Runnable {
        StatusChangeListener listener;

        FetchStatusTimer(StatusChangeListener listener) {
            this.listener = listener;
        }

        public void setRunningState(boolean appRunning) {
            if (appRunning) {
                handler.postDelayed(this, 0);
            } else {
                handler.removeCallbacks(this);
            }
        }

        // Forks an async task to fetch the status. This method is executed on the main thread. 
        @Override
        public void run() {
            int refreshIntervalSecs = FriendlypiApplication.getInstance().getRefreshIntervalSecs();
            if (refreshIntervalSecs != 0) {
                handler.postDelayed(this, refreshIntervalSecs * 1000);
            }
            new FetchStatus(listener).execute();
        }
    }

    private FetchStatusTimer fetchStatusTimer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.modlist_activity);

        // Configure the main list
        adapter = new ModItemAdapter(this, View.generateViewId(), items);
        ListView listView = (ListView) findViewById(R.id.modlistView);
        listView.setAdapter(adapter);

        fetchStatusTimer = new FetchStatusTimer(this);

    }

    @Override
    protected void onResume() {
        super.onResume();
        fetchStatusTimer.setRunningState(true);
    }

    @Override
    protected void onPause() {
        super.onPause();
        fetchStatusTimer.setRunningState(false);
    }

    // Converts the json string into a ModItem array and notifies the adapter that data has changed.
    @Override
    public void onNewStatus(String status) {
        try {
            JSONObject jsonData = new JSONObject(status);
            JSONArray instances = jsonData.getJSONArray("data");

            items.clear();
            for (int i = 0; i < instances.length(); i++) {
                JSONObject instance = (JSONObject) instances.get(i);
                ModItem item = new ModItem(instance);
                items.add(i, item);
            }
        } catch (JSONException e) {
        }
        adapter.notifyDataSetChanged();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_modlist, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
        case R.id.menu_refresh:
            new FetchStatus(this).execute();
            return true;
        case R.id.menu_settings:
            Intent intent = new Intent(this, PreferenceActivity.class);
            startActivity(intent);
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

}