thoerup/traininfo/TimetableList.java

package dk.thoerup.traininfo;


import static dk.thoerup.traininfo.R.string.generic_cancel;
import static dk.thoerup.traininfo.R.string.generic_retry;
import static dk.thoerup.traininfo.R.string.timetablelist_fetchdata;
import static dk.thoerup.traininfo.R.string.timetablelist_fetcherror;
import static dk.thoerup.traininfo.R.string.timetablelist_nodata;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import dk.thoerup.android.traininfo.common.DepartureEntry;
import dk.thoerup.android.traininfo.common.TimetableBean;
import dk.thoerup.android.traininfo.common.TimetableEntry;
import dk.thoerup.android.traininfo.common.StationBean.StationEntry;
import dk.thoerup.traininfo.provider.ProviderFactory;
import dk.thoerup.traininfo.provider.TimetableProvider;
import dk.thoerup.traininfo.util.MessageBox;

public class TimetableList extends ListActivity {
        
        private static final int DLG_PROGRESS = 8000;
        DepartureEntry departure;
        TimetableListAdapter adapter;
        TimetableFetcher fetcher;
        TimetableBean timetables;
        int commFailCounter = 0;
        
        TimetableProvider provider; 

        @SuppressWarnings("unchecked")
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.timetablelist);
                
                provider = ProviderFactory.getTimetableProvider();
                
                adapter = new TimetableListAdapter(this);               
                setListAdapter(adapter);


                Intent launchedBy = getIntent();
                departure = (DepartureEntry) launchedBy.getSerializableExtra("departure");
                
                ((TextView)findViewById(R.id.Train)).setText(departure.getTrainNumber());
                ((TextView)findViewById(R.id.Status)).setText(departure.getStatus());
                ((TextView)findViewById(R.id.Location)).setText(departure.getLocation());
                ((TextView)findViewById(R.id.Note)).setText(departure.getNote());
                ((TextView)findViewById(R.id.Updated)).setText( getLastUpdateString( departure.getUpdated() ));
                                                
                
                ProviderFactory.purgeOldEntries(); //cleanup before fetching more data
                
                if (savedInstanceState == null) {
                        startTimetableFetcher();
                } else {
                        timetables = (TimetableBean) savedInstanceState.getSerializable("timetables");
                        adapter.setTimetable(timetables);
                }
        }

        @Override
        protected void onDestroy() {
                super.onDestroy();
                
                if (fetcher != null) {
                        fetcher.cancel(true);
                }
        }
        
    @Override
        protected void onListItemClick(ListView l, View v, int position, long id) {
                super.onListItemClick(l, v, position, id);

                TimetableEntry tt = timetables.entries.get(position);
                
                StationEntry station = new StationEntry();
                station.setName( tt.getStation() );
                station.setId( tt.getStationId() );
                station.setIsRegional(true);
                
                
                Intent intent = new Intent(this, DepartureList.class);
                intent.putExtra("stationbean", station);
                startActivity(intent);
                
        }
    

        @Override 
    public void onSaveInstanceState(Bundle outState) 
    {           
        dismissDialog(DLG_PROGRESS);
        outState.putSerializable("timetables", (TimetableBean) timetables);
    }

        
        @Override
        protected void onPrepareDialog(int id, Dialog dialog) {
                super.onPrepareDialog(id, dialog);
                
                switch (id) {
                case DLG_PROGRESS:
                        //pgDialog = (ProgressDialog) dialog;
                        break;
                }
        }
        
        @Override
        protected Dialog onCreateDialog(int id) {
                switch (id) {
                case DLG_PROGRESS:
                        ProgressDialog dlg = new ProgressDialog(this);                  
                        dlg.setMessage( getString(timetablelist_fetchdata) );
                        dlg.setCancelable(true);
                        return dlg;                     
                default:
                        return super.onCreateDialog(id);                
                }
        }

        void startTimetableFetcher() {
                showDialog(DLG_PROGRESS);
                fetcher = new TimetableFetcher(); 
                fetcher.execute(departure.getType(), departure.getTrainNumber());
        }
        
        
        public String getLastUpdateString(int lastUpdate) {
                String minutes = this.getString(R.string.departurebean_minutes);
                String unknown = this.getString(R.string.departurebean_unknown);
                switch (lastUpdate) {
                case 1:
                        return "<3 " + minutes;
                case 2:
                        return "3-10 " + minutes;
                case 3:
                        return ">3 " + minutes;
                case 4:
                        return unknown;
                default:
                        return "";
                }
        }

        
        class TimetableFetcher extends AsyncTask<String,Void,Void> {
                
                
                @Override
                protected void onPostExecute(Void result) {
                        super.onPostExecute(result);
                        dismissDialog(DLG_PROGRESS);
        
                        
                        if (timetables != null) {
                                commFailCounter = 0;
                                TimetableList.this.getListView().invalidateViews();
                                adapter.setTimetable(timetables);
                                if (timetables.entries.size() == 0) {
                                        MessageBox.showMessage(TimetableList.this, getString(timetablelist_nodata), true);
                                }
                        } else { // communication or parse error
                                commFailCounter++;
                                AlertDialog.Builder builder = new AlertDialog.Builder(TimetableList.this);                                              
                                builder.setMessage(getString(timetablelist_fetcherror));
                                builder.setCancelable(true);
                                if (commFailCounter < 3) {
                                        builder.setPositiveButton(getString(generic_retry), new DialogInterface.OnClickListener() {
                                                public void onClick(DialogInterface dialog, int id) {
                                                        dialog.dismiss();
                                                        startTimetableFetcher();
                                                        
                                                }
                                        });
                                }
                                builder.setNegativeButton(getString(generic_cancel), new DialogInterface.OnClickListener() {
                                        public void onClick(DialogInterface dialog, int id) {
                                                dialog.dismiss();
                                                TimetableList.this.finish();
                                        }                                                       
                                });
                                
                                try {
                                        builder.show();
                                } catch (android.view.WindowManager.BadTokenException e) {                                      
                                        Log.i("TimetableList", "BadTokenException"); // this can happen if the user switched away from this activity, while doInBackground was running
                                }
                                                                
                        }
                        
                }
                
                @Override
                protected Void doInBackground(String... arg0) {
                        String type = arg0[0];
                        String trainID = arg0[1];
                        timetables = provider.lookupTimetable(type, trainID);
                        
                        return null;
                }
                
        }
}
1	package dk.thoerup.traininfo;
2
3
4	import static dk.thoerup.traininfo.R.string.generic_cancel;
5	import static dk.thoerup.traininfo.R.string.generic_retry;
6	import static dk.thoerup.traininfo.R.string.timetablelist_fetchdata;
7	import static dk.thoerup.traininfo.R.string.timetablelist_fetcherror;
8	import static dk.thoerup.traininfo.R.string.timetablelist_nodata;
9	import android.app.AlertDialog;
10	import android.app.Dialog;
11	import android.app.ListActivity;
12	import android.app.ProgressDialog;
13	import android.content.DialogInterface;
14	import android.content.Intent;
15	import android.os.AsyncTask;
16	import android.os.Bundle;
17	import android.util.Log;
18	import android.view.View;
19	import android.widget.ListView;
20	import android.widget.TextView;
21	import dk.thoerup.android.traininfo.common.DepartureEntry;
22	import dk.thoerup.android.traininfo.common.TimetableBean;
23	import dk.thoerup.android.traininfo.common.TimetableEntry;
24	import dk.thoerup.android.traininfo.common.StationBean.StationEntry;
25	import dk.thoerup.traininfo.provider.ProviderFactory;
26	import dk.thoerup.traininfo.provider.TimetableProvider;
27	import dk.thoerup.traininfo.util.MessageBox;
28
29	public class TimetableList extends ListActivity {
30
31	private static final int DLG_PROGRESS = 8000;
32	DepartureEntry departure;
33	TimetableListAdapter adapter;
34	TimetableFetcher fetcher;
35	TimetableBean timetables;
36	int commFailCounter = 0;
37
38	TimetableProvider provider;
39
40	@SuppressWarnings("unchecked")
41	@Override
42	protected void onCreate(Bundle savedInstanceState) {
43	super.onCreate(savedInstanceState);
44	setContentView(R.layout.timetablelist);
45
46	provider = ProviderFactory.getTimetableProvider();
47
48	adapter = new TimetableListAdapter(this);
49	setListAdapter(adapter);
50
51
52
53	Intent launchedBy = getIntent();
54	departure = (DepartureEntry) launchedBy.getSerializableExtra("departure");
55
56	((TextView)findViewById(R.id.Train)).setText(departure.getTrainNumber());
57	((TextView)findViewById(R.id.Status)).setText(departure.getStatus());
58	((TextView)findViewById(R.id.Location)).setText(departure.getLocation());
59	((TextView)findViewById(R.id.Note)).setText(departure.getNote());
60	((TextView)findViewById(R.id.Updated)).setText( getLastUpdateString( departure.getUpdated() ));
61
62
63	ProviderFactory.purgeOldEntries(); //cleanup before fetching more data
64
65	if (savedInstanceState == null) {
66	startTimetableFetcher();
67	} else {
68	timetables = (TimetableBean) savedInstanceState.getSerializable("timetables");
69	adapter.setTimetable(timetables);
70	}
71	}
72
73	@Override
74	protected void onDestroy() {
75	super.onDestroy();
76
77	if (fetcher != null) {
78	fetcher.cancel(true);
79	}
80	}
81
82	@Override
83	protected void onListItemClick(ListView l, View v, int position, long id) {
84	super.onListItemClick(l, v, position, id);
85
86	TimetableEntry tt = timetables.entries.get(position);
87
88	StationEntry station = new StationEntry();
89	station.setName( tt.getStation() );
90	station.setId( tt.getStationId() );
91	station.setIsRegional(true);
92
93
94	Intent intent = new Intent(this, DepartureList.class);
95	intent.putExtra("stationbean", station);
96	startActivity(intent);
97
98	}
99
100
101
102	@Override
103	public void onSaveInstanceState(Bundle outState)
104	{
105	dismissDialog(DLG_PROGRESS);
106	outState.putSerializable("timetables", (TimetableBean) timetables);
107	}
108
109
110	@Override
111	protected void onPrepareDialog(int id, Dialog dialog) {
112	super.onPrepareDialog(id, dialog);
113
114	switch (id) {
115	case DLG_PROGRESS:
116	//pgDialog = (ProgressDialog) dialog;
117	break;
118	}
119	}
120
121	@Override
122	protected Dialog onCreateDialog(int id) {
123	switch (id) {
124	case DLG_PROGRESS:
125	ProgressDialog dlg = new ProgressDialog(this);
126	dlg.setMessage( getString(timetablelist_fetchdata) );
127	dlg.setCancelable(true);
128	return dlg;
129	default:
130	return super.onCreateDialog(id);
131	}
132	}
133
134	void startTimetableFetcher() {
135	showDialog(DLG_PROGRESS);
136	fetcher = new TimetableFetcher();
137	fetcher.execute(departure.getType(), departure.getTrainNumber());
138	}
139
140
141	public String getLastUpdateString(int lastUpdate) {
142	String minutes = this.getString(R.string.departurebean_minutes);
143	String unknown = this.getString(R.string.departurebean_unknown);
144	switch (lastUpdate) {
145	case 1:
146	return "<3 " + minutes;
147	case 2:
148	return "3-10 " + minutes;
149	case 3:
150	return ">3 " + minutes;
151	case 4:
152	return unknown;
153	default:
154	return "";
155	}
156	}
157
158
159	class TimetableFetcher extends AsyncTask<String,Void,Void> {
160
161
162	@Override
163	protected void onPostExecute(Void result) {
164	super.onPostExecute(result);
165	dismissDialog(DLG_PROGRESS);
166
167
168	if (timetables != null) {
169	commFailCounter = 0;
170	TimetableList.this.getListView().invalidateViews();
171	adapter.setTimetable(timetables);
172	if (timetables.entries.size() == 0) {
173	MessageBox.showMessage(TimetableList.this, getString(timetablelist_nodata), true);
174	}
175	} else { // communication or parse error
176	commFailCounter++;
177	AlertDialog.Builder builder = new AlertDialog.Builder(TimetableList.this);
178	builder.setMessage(getString(timetablelist_fetcherror));
179	builder.setCancelable(true);
180	if (commFailCounter < 3) {
181	builder.setPositiveButton(getString(generic_retry), new DialogInterface.OnClickListener() {
182	public void onClick(DialogInterface dialog, int id) {
183	dialog.dismiss();
184	startTimetableFetcher();
185
186	}
187	});
188	}
189	builder.setNegativeButton(getString(generic_cancel), new DialogInterface.OnClickListener() {
190	public void onClick(DialogInterface dialog, int id) {
191	dialog.dismiss();
192	TimetableList.this.finish();
193	}
194	});
195
196	try {
197	builder.show();
198	} catch (android.view.WindowManager.BadTokenException e) {
199	Log.i("TimetableList", "BadTokenException"); // this can happen if the user switched away from this activity, while doInBackground was running
200	}
201
202	}
203
204	}
205
206	@Override
207	protected Void doInBackground(String... arg0) {
208	String type = arg0[0];
209	String trainID = arg0[1];
210	timetables = provider.lookupTimetable(type, trainID);
211
212	return null;
213	}
214
215	}
216	}