ZonePicker from aosp

1 files changed, 336 insertions, 0 deletions

diff --git a/vdrmanager/src/de/bjusystems/vdrmanager/ZonePicker.java b/vdrmanager/src/de/bjusystems/vdrmanager/ZonePicker.java
new file mode 100644
index 0000000..3b1dfbc
--- /dev/null
+++ b/vdrmanager/src/de/bjusystems/vdrmanager/ZonePicker.java
@@ -0,0 +1,336 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * 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 de.bjusystems.vdrmanager;
+
+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;
+
+import org.xmlpull.v1.XmlPullParserException;
+
+import android.app.ListActivity;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.XmlResourceParser;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.ListView;
+import android.widget.SimpleAdapter;
+
+/**
+ * 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 ListActivity {
+    private static final String TAG = "ZonePicker";
+
+    public static interface ZoneSelectionListener {
+        // You can add any argument if you really need it...
+        public void onZoneSelected(TimeZone tz);
+    }
+
+    private static final String KEY_ID = "id";  // value: String
+    private static final String KEY_DISPLAYNAME = "name";  // value: String
+    private static final String KEY_GMT = "gmt";  // value: String
+    private static final String KEY_OFFSET = "offset";  // value: int (Integer)
+    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;
+
+    private boolean mSortedByTimezone;
+
+    private SimpleAdapter mTimezoneSortedAdapter;
+    private SimpleAdapter mAlphabeticalAdapter;
+
+    private ZoneSelectionListener mListener;
+
+    private String selectedTimeZone;
+
+    /**
+     * Constructs an adapter with TimeZone list. Sorted by TimeZone in default.
+     *
+     * @param sortedByName use Name for sorting the list.
+     */
+    public static SimpleAdapter constructTimezoneAdapter(Context context,
+            boolean sortedByName) {
+        return constructTimezoneAdapter(context, sortedByName,
+                android.R.layout.simple_list_item_2);
+    }
+
+    /**
+     * Constructs an adapter with TimeZone list. Sorted by TimeZone in default.
+     *
+     * @param sortedByName use Name for sorting the list.
+     */
+    public static SimpleAdapter constructTimezoneAdapter(Context context,
+            boolean sortedByName, int layoutId) {
+        final String[] from = new String[] {KEY_DISPLAYNAME, KEY_GMT};
+        final int[] to = new int[] {android.R.id.text1, android.R.id.text2};
+
+        final String sortKey = (sortedByName ? KEY_DISPLAYNAME : KEY_OFFSET);
+        final MyComparator comparator = new MyComparator(sortKey);
+        final List<HashMap<String, Object>> sortedList = getZones(context);
+        Collections.sort(sortedList, comparator);
+        final SimpleAdapter adapter = new SimpleAdapter(context,
+                sortedList,
+                layoutId,
+                from,
+                to);
+
+        return adapter;
+    }
+
+    /**
+     * Searches {@link TimeZone} from the given {@link SimpleAdapter} object, and returns
+     * the index for the TimeZone.
+     *
+     * @param adapter SimpleAdapter constructed by
+     * {@link #constructTimezoneAdapter(Context, boolean)}.
+     * @param tz TimeZone to be searched.
+     * @return Index for the given TimeZone. -1 when there's no corresponding list item.
+     * returned.
+     */
+    public static int getTimeZoneIndex(SimpleAdapter adapter, TimeZone tz) {
+        final String defaultId = tz.getID();
+        final int listSize = adapter.getCount();
+        for (int i = 0; i < listSize; i++) {
+            // Using HashMap<String, Object> induces unnecessary warning.
+            final HashMap<?,?> map = (HashMap<?,?>)adapter.getItem(i);
+            final String id = (String)map.get(KEY_ID);
+            if (defaultId.equals(id)) {
+                // If current timezone is in this list, move focus to it
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * @param item one of items in adapters. The adapter should be constructed by
+     * {@link #constructTimezoneAdapter(Context, boolean)}.
+     * @return TimeZone object corresponding to the item.
+     */
+    public static TimeZone obtainTimeZoneFromItem(Object item) {
+        return TimeZone.getTimeZone((String)((Map<?, ?>)item).get(KEY_ID));
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+    	super.onCreate(savedInstanceState);
+
+    	selectedTimeZone = getIntent().getStringExtra("current_tz");
+
+        mTimezoneSortedAdapter = constructTimezoneAdapter(this, false);
+        mAlphabeticalAdapter = constructTimezoneAdapter(this, true);
+
+        // Sets the adapter
+        setSorting(true);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        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);
+        return true;
+    }
+
+
+    @Override
+    public boolean 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);
+        }
+        return true;
+    }
+
+    @Override
+    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 sortByTimezone) {
+        final SimpleAdapter adapter =
+                sortByTimezone ? mTimezoneSortedAdapter : mAlphabeticalAdapter;
+        setListAdapter(adapter);
+        mSortedByTimezone = sortByTimezone;
+        final int defaultIndex = getTimeZoneIndex(adapter, TimeZone.getDefault());
+        if (defaultIndex >= 0) {
+            setSelection(defaultIndex);
+        }
+    }
+
+    private static List<HashMap<String, Object>> getZones(Context context) {
+        final List<HashMap<String, Object>> myData = new ArrayList<HashMap<String, Object>>();
+        final long date = Calendar.getInstance().getTimeInMillis();
+        try {
+        	XmlResourceParser xrp = context.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;
+    }
+
+    private static void addItem(
+            List<HashMap<String, Object>> myData, String id, String displayName, long date) {
+        final HashMap<String, Object> map = new HashMap<String, Object>();
+        map.put(KEY_ID, id);
+        map.put(KEY_DISPLAYNAME, displayName);
+        final TimeZone tz = TimeZone.getTimeZone(id);
+        final int offset = tz.getOffset(date);
+        final int p = Math.abs(offset);
+        final 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);
+
+        myData.add(map);
+    }
+
+    @Override
+    public void onListItemClick(ListView listView, View v, int position, long id) {
+        final Map<?, ?> map = (Map<?, ?>)listView.getItemAtPosition(position);
+        final String tzId = (String) map.get(KEY_ID);
+
+        // Update the system timezone value
+        //final AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
+        //alarm.setTimeZone(tzId);
+        final TimeZone tz = TimeZone.getTimeZone(tzId);
+        //if (mListener != null) {
+          //  mListener.onZoneSelected(tz);
+        //} else {
+          //  onBackPressed();
+        ///}
+        Intent returnIntent = new Intent();
+        if(tz == null){
+        	setResult(RESULT_CANCELED, returnIntent);
+        } else {
+        	returnIntent.putExtra("new_tz",tz.getID());
+        	setResult(RESULT_OK, returnIntent);
+        }
+        finish();
+    }
+
+    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);
+        }
+    }
+}