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      1 /*
      2  * Copyright (C) 2011 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.email.activity;
     18 
     19 import com.android.email.R;
     20 import com.android.mail.providers.Account;
     21 import com.android.mail.providers.UIProvider;
     22 
     23 import android.app.AlertDialog;
     24 import android.app.Dialog;
     25 import android.app.DialogFragment;
     26 import android.app.Fragment;
     27 import android.app.LoaderManager;
     28 import android.content.Context;
     29 import android.content.CursorLoader;
     30 import android.content.DialogInterface;
     31 import android.content.Loader;
     32 import android.database.Cursor;
     33 import android.os.Bundle;
     34 import android.view.View;
     35 import android.widget.AdapterView;
     36 import android.widget.AdapterView.OnItemClickListener;
     37 import android.widget.ListView;
     38 import android.widget.SimpleCursorAdapter;
     39 
     40 /**
     41  * Dialog which lists QuickResponses for the specified account. On user selection, will call
     42  * Callback.onQuickResponseSelected() with the selected QuickResponse text.
     43  */
     44 public class InsertQuickResponseDialog extends DialogFragment {
     45     // Key for the Account object in the arguments bundle
     46     private static final String ACCOUNT_KEY = "account";
     47 
     48     /**
     49      * Callback interface for when user selects a QuickResponse.
     50      */
     51     public interface Callback {
     52         /**
     53          * Handles the text of the selected QuickResponse.
     54          */
     55         public void onQuickResponseSelected(CharSequence quickResponse);
     56     }
     57 
     58     // Public no-args constructor needed for fragment re-instantiation
     59     public InsertQuickResponseDialog() {}
     60 
     61     /**
     62      * Create and returns new dialog.
     63      *
     64      * @param callbackFragment fragment that implements {@link Callback}.  Or null, in which case
     65      * the parent activity must implement {@link Callback}.
     66      */
     67     public static InsertQuickResponseDialog
     68             newInstance(Fragment callbackFragment, Account account) {
     69         final InsertQuickResponseDialog dialog = new InsertQuickResponseDialog();
     70 
     71         // If a target is set, it MUST implement Callback. Fail-fast if not.
     72         if (callbackFragment != null) {
     73             if (!(callbackFragment instanceof Callback)) {
     74                 throw new ClassCastException(callbackFragment.toString()
     75                         + " must implement Callback");
     76             }
     77             dialog.setTargetFragment(callbackFragment, 0);
     78         }
     79 
     80         Bundle args = new Bundle();
     81         args.putParcelable(ACCOUNT_KEY, account);
     82         dialog.setArguments(args);
     83         return dialog;
     84     }
     85 
     86     @Override
     87     public Dialog onCreateDialog(Bundle savedInstanceState) {
     88         // If target not set, the parent activity MUST implement Callback. Fail-fast if not.
     89         final Fragment targetFragment = getTargetFragment();
     90         if (targetFragment != null) {
     91             if (!(getActivity() instanceof Callback)) {
     92                 throw new ClassCastException(getActivity().toString() + " must implement Callback");
     93             }
     94         }
     95 
     96         // Now that Callback implementation is verified, build the dialog
     97         final Context context = getActivity();
     98 
     99         final SimpleCursorAdapter adapter = new SimpleCursorAdapter(getActivity(),
    100                 R.layout.quick_response_item, null,
    101                 new String[] {UIProvider.QuickResponseColumns.TEXT},
    102                 new int[] {R.id.quick_response_text}, 0);
    103 
    104         final ListView listView = new ListView(context);
    105         listView.setAdapter(adapter);
    106 
    107         listView.setOnItemClickListener(new OnItemClickListener() {
    108             @Override
    109             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    110                 final Cursor c = (Cursor) listView.getItemAtPosition(position);
    111                 final String quickResponseText =
    112                         c.getString(c.getColumnIndex(UIProvider.QuickResponseColumns.TEXT));
    113                 getCallback().onQuickResponseSelected(quickResponseText);
    114                 dismiss();
    115             }
    116         });
    117 
    118         final Account account = getArguments().getParcelable(ACCOUNT_KEY);
    119 
    120         getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
    121             @Override
    122             public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    123                 return new CursorLoader(getActivity(), account.quickResponseUri,
    124                         UIProvider.QUICK_RESPONSE_PROJECTION, null, null, null);
    125             }
    126 
    127             @Override
    128             public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    129                 adapter.swapCursor(data);
    130             }
    131 
    132             @Override
    133             public void onLoaderReset(Loader<Cursor> loader) {
    134                 adapter.swapCursor(null);
    135             }
    136         });
    137 
    138         final AlertDialog.Builder b = new AlertDialog.Builder(context);
    139         b.setTitle(getResources()
    140                 .getString(R.string.message_compose_insert_quick_response_list_title))
    141                 .setView(listView)
    142                 .setNegativeButton(R.string.cancel_action, new DialogInterface.OnClickListener() {
    143                     @Override
    144                     public void onClick(DialogInterface dialog, int which) {
    145                         dialog.cancel();
    146                     }
    147                 });
    148         return b.create();
    149     }
    150 
    151     private Callback getCallback() {
    152         Fragment targetFragment = getTargetFragment();
    153         if (targetFragment != null) {
    154             return (Callback) targetFragment;
    155         }
    156         return (Callback) getActivity();
    157     }
    158 }
    159