Fragmentize ZoneList, which is needed in DateTimeSettings refactoring.

- remove old ZonePicker and rename ZoneList to ZonePicker, as
  the name is really confusing (see LocalePicker)
- Make the new ZonePicker fragment.
- remove dependency toward "ZoneList" class.
-- AndroidManifest.xml does not allow the other components to
   access ZoneList directly, so it would be ok to remove without
   using activity-alias.
-- Noticed there is a significant code duplication between
   DateTimeSettings and DateTimeSettingsActivity. I'll work on it
   later.
- add DateTimeSettingsSetupWizardXL class, which is not used yet,
  but will be in the near future.
-- It is not recognized by AndroidManifest.xml

Change-Id: Id26152a3d560f9e0bd84afdf3e1c5101f0e166b4

1 files changed, 239 insertions, 33 deletions

diff --git a/src/com/android/settings/ZonePicker.java b/src/com/android/settings/ZonePicker.java
index def5036ae..c877bd7aa 100644
--- a/src/com/android/settings/ZonePicker.java
+++ b/src/com/android/settings/ZonePicker.java
@@ -16,55 +16,261 @@
 
 package com.android.settings;
 
-import android.app.ListActivity;
-import android.content.Intent;
+import android.app.Activity;
+import android.app.AlarmManager;
+import android.app.ListFragment;
+import android.content.Context;
+import android.content.res.XmlResourceParser;
 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.ArrayAdapter;
 import android.widget.ListView;
+import android.widget.SimpleAdapter;
 
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.TimeZone;
+
+/**
+ * The class displaying a list of time zones that match a filter string
+ * such as "Africa", "Europe", etc. Choosing an item from the list will set
+ * the time zone. Pressing Back without choosing from the list will not 
+ * result in a change in the time zone setting.
+ */
+public class ZonePicker extends ListFragment {
+    private static final String TAG = "ZonePicker";
+
+    public static interface ZoneSelectionListener {
+        // You can add any argument if you really need it...
+        public void onZoneSelected();
+    }
+
+    private static final String KEY_ID = "id";
+    private static final String KEY_DISPLAYNAME = "name";
+    private static final String KEY_GMT = "gmt";
+    private static final String KEY_OFFSET = "offset";
+    private static final String XMLTAG_TIMEZONE = "timezone";
+
+    private static final int HOURS_1 = 60 * 60000;
+
+    private static final int MENU_TIMEZONE = Menu.FIRST+1;
+    private static final int MENU_ALPHABETICAL = Menu.FIRST;
+
+    // Initial focus position
+    private int mDefault;
+
+    private boolean mSortedByTimezone;
+
+    private SimpleAdapter mTimezoneSortedAdapter;
+    private SimpleAdapter mAlphabeticalAdapter;
+
+    private ZoneSelectionListener mListener;
+
+    @Override
+    public void onActivityCreated(Bundle savedInstanseState) {
+        super.onActivityCreated(savedInstanseState);
+
+        final String[] from = new String[] {KEY_DISPLAYNAME, KEY_GMT};
+        final int[] to = new int[] {android.R.id.text1, android.R.id.text2};
 
-public class ZonePicker extends ListActivity {
+        MyComparator comparator = new MyComparator(KEY_OFFSET);
+
+        Activity activity = getActivity();
+        List<HashMap> timezoneSortedList = getZones();
+        Collections.sort(timezoneSortedList, comparator);
+        mTimezoneSortedAdapter = new SimpleAdapter(activity,
+                (List) timezoneSortedList,
+                android.R.layout.simple_list_item_2,
+                from,
+                to);
+
+        List<HashMap> alphabeticalList = new ArrayList<HashMap>(timezoneSortedList);
+        comparator.setSortingKey(KEY_DISPLAYNAME);
+        Collections.sort(alphabeticalList, comparator);
+        mAlphabeticalAdapter = new SimpleAdapter(getActivity(),
+                (List) alphabeticalList,
+                android.R.layout.simple_list_item_2,
+                from,
+                to);
+
+        // Sets the adapter
+        setSorting(true);
+
+        // If current timezone is in this list, move focus to it
+        setSelection(mDefault);
+    }
 
-    private ArrayAdapter<CharSequence> mFilterAdapter;
-    
     @Override
-    public void onCreate(Bundle icicle) {
-        super.onCreate(icicle);
-        mFilterAdapter = ArrayAdapter.createFromResource(this,
-                R.array.timezone_filters, android.R.layout.simple_list_item_1);
-        setListAdapter(mFilterAdapter);
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        menu.add(0, MENU_ALPHABETICAL, 0, R.string.zone_list_menu_sort_alphabetically)
+            .setIcon(android.R.drawable.ic_menu_sort_alphabetically);
+        menu.add(0, MENU_TIMEZONE, 0, R.string.zone_list_menu_sort_by_timezone)
+            .setIcon(R.drawable.ic_menu_3d_globe);
+        super.onCreateOptionsMenu(menu, inflater);
     }
-    
-    protected void addItem(List<Map> data, String name, String zone) {
-        HashMap temp = new HashMap();
-        temp.put("title", name);
-        temp.put("zone", zone);
-        data.add(temp);
+
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        if (mSortedByTimezone) {
+            menu.findItem(MENU_TIMEZONE).setVisible(false);
+            menu.findItem(MENU_ALPHABETICAL).setVisible(true);
+        } else {
+            menu.findItem(MENU_TIMEZONE).setVisible(true);
+            menu.findItem(MENU_ALPHABETICAL).setVisible(false);
+        }
     }
 
     @Override
-    protected void onListItemClick(ListView l, View v, int position, long id) {
-        String filter = (String) mFilterAdapter.getItem(position);
-        // If All is chosen, reset the filter
-        if (filter.equals("All")) {
-            filter = null;
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+            case MENU_TIMEZONE:
+                setSorting(true);
+                return true;
+
+            case MENU_ALPHABETICAL:
+                setSorting(false);
+                return true;
+
+            default:
+                return false;
+        }
+    }
+
+    public void setZoneSelectionListener(ZoneSelectionListener listener) {
+        mListener = listener;
+    }
+
+    private void setSorting(boolean timezone) {
+        setListAdapter(timezone ? mTimezoneSortedAdapter : mAlphabeticalAdapter);
+        mSortedByTimezone = timezone;
+    }
+
+    private List<HashMap> getZones() {
+        List<HashMap> myData = new ArrayList<HashMap>();
+        long date = Calendar.getInstance().getTimeInMillis();
+        try {
+            XmlResourceParser xrp = getActivity().getResources().getXml(R.xml.timezones);
+            while (xrp.next() != XmlResourceParser.START_TAG)
+                continue;
+            xrp.next();
+            while (xrp.getEventType() != XmlResourceParser.END_TAG) {
+                while (xrp.getEventType() != XmlResourceParser.START_TAG) {
+                    if (xrp.getEventType() == XmlResourceParser.END_DOCUMENT) {
+                        return myData;
+                    }
+                    xrp.next();
+                }
+                if (xrp.getName().equals(XMLTAG_TIMEZONE)) {
+                    String id = xrp.getAttributeValue(0);
+                    String displayName = xrp.nextText();
+                    addItem(myData, id, displayName, date);
+                }
+                while (xrp.getEventType() != XmlResourceParser.END_TAG) {
+                    xrp.next();
+                }
+                xrp.next();
+            }
+            xrp.close();
+        } catch (XmlPullParserException xppe) {
+            Log.e(TAG, "Ill-formatted timezones.xml file");
+        } catch (java.io.IOException ioe) {
+            Log.e(TAG, "Unable to read timezones.xml file");
+        }
+
+        return myData;
+    }
+
+    protected void addItem(List<HashMap> myData, String id, String displayName, 
+            long date) {
+        HashMap map = new HashMap();
+        map.put(KEY_ID, id);
+        map.put(KEY_DISPLAYNAME, displayName);
+        TimeZone tz = TimeZone.getTimeZone(id);
+        int offset = tz.getOffset(date);
+        int p = Math.abs(offset);
+        StringBuilder name = new StringBuilder();
+        name.append("GMT");
+
+        if (offset < 0) {
+            name.append('-');
+        } else {
+            name.append('+');
+        }
+
+        name.append(p / (HOURS_1));
+        name.append(':');
+
+        int min = p / 60000;
+        min %= 60;
+
+        if (min < 10) {
+            name.append('0');
+        }
+        name.append(min);
+
+        map.put(KEY_GMT, name.toString());
+        map.put(KEY_OFFSET, offset);
+
+        if (id.equals(TimeZone.getDefault().getID())) {
+            mDefault = myData.size();
         }
-        Intent zoneList = new Intent();
-        zoneList.setClass(this, ZoneList.class);
-        zoneList.putExtra("filter", filter);
-        
-        startActivityForResult(zoneList, 0);
+
+        myData.add(map);
     }
-    
+
     @Override
-    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-        // If subactivity has resulted in a timezone selection, close this act.
-        if (resultCode == RESULT_OK) {
-            finish();
+    public void onListItemClick(ListView l, View v, int position, long id) {
+        Map map = (Map) l.getItemAtPosition(position);
+        // Update the system timezone value
+        final Activity activity = getActivity();
+        AlarmManager alarm = (AlarmManager) activity.getSystemService(Context.ALARM_SERVICE);
+        alarm.setTimeZone((String) map.get(KEY_ID));
+        if (mListener != null) {
+            mListener.onZoneSelected();
+        }
+    }
+
+    private static class MyComparator implements Comparator<HashMap> {
+        private String mSortingKey;
+
+        public MyComparator(String sortingKey) {
+            mSortingKey = sortingKey;
+        }
+
+        public void setSortingKey(String sortingKey) {
+            mSortingKey = sortingKey;
         }
-    }    
+
+        public int compare(HashMap map1, HashMap map2) {
+            Object value1 = map1.get(mSortingKey);
+            Object value2 = map2.get(mSortingKey);
+
+            /*
+             * This should never happen, but just in-case, put non-comparable
+             * items at the end.
+             */
+            if (!isComparable(value1)) {
+                return isComparable(value2) ? 1 : 0;
+            } else if (!isComparable(value2)) {
+                return -1;
+            }
+
+            return ((Comparable) value1).compareTo(value2);
+        }
+
+        private boolean isComparable(Object value) {
+            return (value != null) && (value instanceof Comparable); 
+        }
+    }
 }