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      1 /*
      2  * Copyright (C) 2010 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.contacts.common.editor;
     18 
     19 import android.app.AlertDialog;
     20 import android.app.Dialog;
     21 import android.app.DialogFragment;
     22 import android.app.Fragment;
     23 import android.app.FragmentManager;
     24 import android.content.DialogInterface;
     25 import android.os.Bundle;
     26 
     27 import com.android.contacts.common.R;
     28 import com.android.contacts.common.model.account.AccountWithDataSet;
     29 import com.android.contacts.common.util.AccountsListAdapter;
     30 import com.android.contacts.common.util.AccountsListAdapter.AccountListFilter;
     31 
     32 /**
     33  * Shows a dialog asking the user which account to chose.
     34  *
     35  * The result is passed to {@code targetFragment} passed to {@link #show}.
     36  */
     37 public final class SelectAccountDialogFragment extends DialogFragment {
     38     public static final String TAG = "SelectAccountDialogFragment";
     39 
     40     private static final String KEY_TITLE_RES_ID = "title_res_id";
     41     private static final String KEY_LIST_FILTER = "list_filter";
     42     private static final String KEY_EXTRA_ARGS = "extra_args";
     43 
     44     public SelectAccountDialogFragment() { // All fragments must have a public default constructor.
     45     }
     46 
     47     /**
     48      * Show the dialog.
     49      *
     50      * @param fragmentManager {@link FragmentManager}.
     51      * @param targetFragment {@link Fragment} that implements {@link Listener}.
     52      * @param titleResourceId resource ID to use as the title.
     53      * @param accountListFilter account filter.
     54      * @param extraArgs Extra arguments, which will later be passed to
     55      *     {@link Listener#onAccountChosen}.  {@code null} will be converted to
     56      *     {@link Bundle#EMPTY}.
     57      */
     58     public static <F extends Fragment & Listener> void show(FragmentManager fragmentManager,
     59             F targetFragment, int titleResourceId,
     60             AccountListFilter accountListFilter, Bundle extraArgs) {
     61         final Bundle args = new Bundle();
     62         args.putInt(KEY_TITLE_RES_ID, titleResourceId);
     63         args.putSerializable(KEY_LIST_FILTER, accountListFilter);
     64         args.putBundle(KEY_EXTRA_ARGS, (extraArgs == null) ? Bundle.EMPTY : extraArgs);
     65 
     66         final SelectAccountDialogFragment instance = new SelectAccountDialogFragment();
     67         instance.setArguments(args);
     68         instance.setTargetFragment(targetFragment, 0);
     69         instance.show(fragmentManager, null);
     70     }
     71 
     72     @Override
     73     public Dialog onCreateDialog(Bundle savedInstanceState) {
     74         final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
     75         final Bundle args = getArguments();
     76 
     77         final AccountListFilter filter = (AccountListFilter) args.getSerializable(KEY_LIST_FILTER);
     78         final AccountsListAdapter accountAdapter = new AccountsListAdapter(builder.getContext(),
     79                 filter);
     80         accountAdapter.setCustomLayout(R.layout.account_selector_list_item_condensed);
     81 
     82         final DialogInterface.OnClickListener clickListener =
     83                 new DialogInterface.OnClickListener() {
     84             @Override
     85             public void onClick(DialogInterface dialog, int which) {
     86                 dialog.dismiss();
     87 
     88                 onAccountSelected(accountAdapter.getItem(which));
     89             }
     90         };
     91 
     92         builder.setTitle(args.getInt(KEY_TITLE_RES_ID));
     93         builder.setSingleChoiceItems(accountAdapter, 0, clickListener);
     94         final AlertDialog result = builder.create();
     95         return result;
     96     }
     97 
     98     @Override
     99     public void onCancel(DialogInterface dialog) {
    100         super.onCancel(dialog);
    101         final Fragment targetFragment = getTargetFragment();
    102         if (targetFragment != null && targetFragment instanceof Listener) {
    103             final Listener target = (Listener) targetFragment;
    104             target.onAccountSelectorCancelled();
    105         }
    106     }
    107 
    108     @Override
    109     public void onSaveInstanceState(Bundle b) {
    110         setTargetFragment(null, -1);
    111         super.onSaveInstanceState(b);
    112     }
    113 
    114     /**
    115      * Calls {@link Listener#onAccountChosen} of {@code targetFragment}.
    116      */
    117     private void onAccountSelected(AccountWithDataSet account) {
    118         final Fragment targetFragment = getTargetFragment();
    119         if (targetFragment != null && targetFragment instanceof Listener) {
    120             final Listener target = (Listener) targetFragment;
    121             target.onAccountChosen(account, getArguments().getBundle(KEY_EXTRA_ARGS));
    122         }
    123     }
    124 
    125     public interface Listener {
    126         void onAccountChosen(AccountWithDataSet account, Bundle extraArgs);
    127         void onAccountSelectorCancelled();
    128     }
    129 }
    130