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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.phone;
     18 
     19 import static android.view.Window.PROGRESS_VISIBILITY_OFF;
     20 import static android.view.Window.PROGRESS_VISIBILITY_ON;
     21 
     22 import android.app.ListActivity;
     23 import android.content.AsyncQueryHandler;
     24 import android.content.ContentResolver;
     25 import android.content.Context;
     26 import android.content.Intent;
     27 import android.database.Cursor;
     28 import android.net.Uri;
     29 import android.os.Bundle;
     30 import android.provider.Settings;
     31 import android.util.Log;
     32 import android.view.Window;
     33 import android.widget.CursorAdapter;
     34 import android.widget.SimpleCursorAdapter;
     35 import android.widget.TextView;
     36 
     37 /**
     38  * ADN List activity for the Phone app.
     39  */
     40 public class ADNList extends ListActivity {
     41     protected static final String TAG = "ADNList";
     42     protected static final boolean DBG = false;
     43 
     44     private static final String[] COLUMN_NAMES = new String[] {
     45         "name",
     46         "number",
     47         "emails"
     48     };
     49 
     50     protected static final int NAME_COLUMN = 0;
     51     protected static final int NUMBER_COLUMN = 1;
     52     protected static final int EMAILS_COLUMN = 2;
     53 
     54     private static final int[] VIEW_NAMES = new int[] {
     55         android.R.id.text1,
     56         android.R.id.text2
     57     };
     58 
     59     protected static final int QUERY_TOKEN = 0;
     60     protected static final int INSERT_TOKEN = 1;
     61     protected static final int UPDATE_TOKEN = 2;
     62     protected static final int DELETE_TOKEN = 3;
     63 
     64 
     65     protected QueryHandler mQueryHandler;
     66     protected CursorAdapter mCursorAdapter;
     67     protected Cursor mCursor = null;
     68 
     69     private TextView mEmptyText;
     70 
     71     protected int mInitialSelection = -1;
     72 
     73     @Override
     74     protected void onCreate(Bundle icicle) {
     75         super.onCreate(icicle);
     76         getWindow().requestFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
     77         setContentView(R.layout.adn_list);
     78         mEmptyText = (TextView) findViewById(android.R.id.empty);
     79         mQueryHandler = new QueryHandler(getContentResolver());
     80     }
     81 
     82     @Override
     83     protected void onResume() {
     84         super.onResume();
     85         query();
     86     }
     87 
     88     @Override
     89     protected void onStop() {
     90         super.onStop();
     91         if (mCursor != null) {
     92             mCursor.deactivate();
     93         }
     94     }
     95 
     96     protected Uri resolveIntent() {
     97         Intent intent = getIntent();
     98         if (intent.getData() == null) {
     99             intent.setData(Uri.parse("content://icc/adn"));
    100         }
    101 
    102         return intent.getData();
    103     }
    104 
    105     private void query() {
    106         Uri uri = resolveIntent();
    107         if (DBG) log("query: starting an async query");
    108         mQueryHandler.startQuery(QUERY_TOKEN, null, uri, COLUMN_NAMES,
    109                 null, null, null);
    110         displayProgress(true);
    111     }
    112 
    113     private void reQuery() {
    114         query();
    115     }
    116 
    117     private void setAdapter() {
    118         // NOTE:
    119         // As it it written, the positioning code below is NOT working.
    120         // However, this current non-working state is in compliance with
    121         // the UI paradigm, so we can't really do much to change it.
    122 
    123         // In the future, if we wish to get this "positioning" correct,
    124         // we'll need to do the following:
    125         //   1. Change the layout to in the cursor adapter to:
    126         //     android.R.layout.simple_list_item_checked
    127         //   2. replace the selection / focus code with:
    128         //     getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    129         //     getListView().setItemChecked(mInitialSelection, true);
    130 
    131         // Since the positioning is really only useful for the dialer's
    132         // SpecialCharSequence case (dialing '2#' to get to the 2nd
    133         // contact for instance), it doesn't make sense to mess with
    134         // the usability of the activity just for this case.
    135 
    136         // These artifacts include:
    137         //  1. UI artifacts (checkbox and highlight at the same time)
    138         //  2. Allowing the user to edit / create new SIM contacts when
    139         //    the user is simply trying to retrieve a number into the d
    140         //    dialer.
    141 
    142         if (mCursorAdapter == null) {
    143             mCursorAdapter = newAdapter();
    144 
    145             setListAdapter(mCursorAdapter);
    146         } else {
    147             mCursorAdapter.changeCursor(mCursor);
    148         }
    149 
    150         if (mInitialSelection >=0 && mInitialSelection < mCursorAdapter.getCount()) {
    151             setSelection(mInitialSelection);
    152             getListView().setFocusableInTouchMode(true);
    153             boolean gotfocus = getListView().requestFocus();
    154         }
    155     }
    156 
    157     protected CursorAdapter newAdapter() {
    158         return new SimpleCursorAdapter(this,
    159                     android.R.layout.simple_list_item_2,
    160                     mCursor, COLUMN_NAMES, VIEW_NAMES);
    161     }
    162 
    163     private void displayProgress(boolean loading) {
    164         if (DBG) log("displayProgress: " + loading);
    165 
    166         mEmptyText.setText(loading ? R.string.simContacts_emptyLoading:
    167             (isAirplaneModeOn(this) ? R.string.simContacts_airplaneMode :
    168                 R.string.simContacts_empty));
    169         getWindow().setFeatureInt(
    170                 Window.FEATURE_INDETERMINATE_PROGRESS,
    171                 loading ? PROGRESS_VISIBILITY_ON : PROGRESS_VISIBILITY_OFF);
    172     }
    173 
    174     private static boolean isAirplaneModeOn(Context context) {
    175         return Settings.System.getInt(context.getContentResolver(),
    176                 Settings.System.AIRPLANE_MODE_ON, 0) != 0;
    177     }
    178 
    179     private class QueryHandler extends AsyncQueryHandler {
    180         public QueryHandler(ContentResolver cr) {
    181             super(cr);
    182         }
    183 
    184         @Override
    185         protected void onQueryComplete(int token, Object cookie, Cursor c) {
    186             if (DBG) log("onQueryComplete: cursor.count=" + c.getCount());
    187             mCursor = c;
    188             setAdapter();
    189             displayProgress(false);
    190 
    191             // Cursor is refreshed and inherited classes may have menu items depending on it.
    192             invalidateOptionsMenu();
    193         }
    194 
    195         @Override
    196         protected void onInsertComplete(int token, Object cookie, Uri uri) {
    197             if (DBG) log("onInsertComplete: requery");
    198             reQuery();
    199         }
    200 
    201         @Override
    202         protected void onUpdateComplete(int token, Object cookie, int result) {
    203             if (DBG) log("onUpdateComplete: requery");
    204             reQuery();
    205         }
    206 
    207         @Override
    208         protected void onDeleteComplete(int token, Object cookie, int result) {
    209             if (DBG) log("onDeleteComplete: requery");
    210             reQuery();
    211         }
    212     }
    213 
    214     protected void log(String msg) {
    215         Log.d(TAG, "[ADNList] " + msg);
    216     }
    217 }
    218