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