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      1 /*
      2  * Copyright (C) 2014 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.settings;
     18 
     19 import com.android.phone.R;
     20 
     21 import android.app.AlertDialog;
     22 import android.content.Context;
     23 import android.content.DialogInterface;
     24 import android.content.Intent;
     25 import android.os.UserHandle;
     26 import android.preference.ListPreference;
     27 import android.preference.Preference;
     28 import android.telecom.PhoneAccountHandle;
     29 import android.telecom.TelecomManager;
     30 import android.util.AttributeSet;
     31 
     32 import java.util.List;
     33 import java.util.Objects;
     34 
     35 public class AccountSelectionPreference extends ListPreference implements
     36         Preference.OnPreferenceChangeListener {
     37 
     38     public interface AccountSelectionListener {
     39         boolean onAccountSelected(AccountSelectionPreference pref, PhoneAccountHandle account);
     40         void onAccountSelectionDialogShow(AccountSelectionPreference pref);
     41         void onAccountChanged(AccountSelectionPreference pref);
     42     }
     43 
     44     private final Context mContext;
     45     private AccountSelectionListener mListener;
     46     private PhoneAccountHandle[] mAccounts;
     47     private String[] mEntryValues;
     48     private CharSequence[] mEntries;
     49     private boolean mShowSelectionInSummary = true;
     50 
     51     public AccountSelectionPreference(Context context) {
     52         this(context, null);
     53     }
     54 
     55     public AccountSelectionPreference(Context context, AttributeSet attrs) {
     56         super(context, attrs);
     57         mContext = context;
     58         setOnPreferenceChangeListener(this);
     59     }
     60 
     61     public void setListener(AccountSelectionListener listener) {
     62         mListener = listener;
     63     }
     64 
     65     public void setShowSelectionInSummary(boolean value) {
     66         mShowSelectionInSummary = value;
     67     }
     68 
     69     public void setModel(
     70             TelecomManager telecomManager,
     71             List<PhoneAccountHandle> accountsList,
     72             PhoneAccountHandle currentSelection,
     73             CharSequence nullSelectionString) {
     74 
     75         mAccounts = accountsList.toArray(new PhoneAccountHandle[accountsList.size()]);
     76         mEntryValues = new String[mAccounts.length + 1];
     77         mEntries = new CharSequence[mAccounts.length + 1];
     78 
     79         int selectedIndex = mAccounts.length;  // Points to nullSelectionString by default
     80         int i = 0;
     81         for ( ; i < mAccounts.length; i++) {
     82             CharSequence label = telecomManager.getPhoneAccount(mAccounts[i]).getLabel();
     83             mEntries[i] = label == null ? null : label.toString();
     84             mEntryValues[i] = Integer.toString(i);
     85             if (Objects.equals(currentSelection, mAccounts[i])) {
     86                 selectedIndex = i;
     87             }
     88         }
     89         mEntryValues[i] = Integer.toString(i);
     90         mEntries[i] = nullSelectionString;
     91 
     92         setEntryValues(mEntryValues);
     93         setEntries(mEntries);
     94         setValueIndex(selectedIndex);
     95         if (mShowSelectionInSummary) {
     96             setSummary(mEntries[selectedIndex]);
     97         }
     98     }
     99 
    100     @Override
    101     public boolean onPreferenceChange(Preference preference, Object newValue) {
    102         if (mListener != null) {
    103             int index = Integer.parseInt((String) newValue);
    104             PhoneAccountHandle account = index < mAccounts.length ? mAccounts[index] : null;
    105             if (mListener.onAccountSelected(this, account)) {
    106                 if (mShowSelectionInSummary) {
    107                     setSummary(mEntries[index]);
    108                 }
    109                 if (index != findIndexOfValue(getValue())) {
    110                     setValueIndex(index);
    111                     mListener.onAccountChanged(this);
    112                 }
    113                 return true;
    114             }
    115         }
    116         return false;
    117     }
    118 
    119     /**
    120      * Modifies the dialog to change the default "Cancel" button to "Choose Accounts", which
    121      * triggers the {@link PhoneAccountSelectionPreferenceActivity} to be shown.
    122      *
    123      * @param builder The {@code AlertDialog.Builder}.
    124      */
    125     @Override
    126     protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
    127         // Notify the listener that the dialog is about to be built.  This is important so that the
    128         // list of enabled accounts can be updated prior to showing the dialog.
    129         mListener.onAccountSelectionDialogShow(this);
    130 
    131         super.onPrepareDialogBuilder(builder);
    132     }
    133 }
    134