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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.content.pm.PackageManager;
     26 import android.os.UserHandle;
     27 import android.preference.ListPreference;
     28 import android.preference.Preference;
     29 import android.telecom.PhoneAccountHandle;
     30 import android.telecom.TelecomManager;
     31 import android.util.AttributeSet;
     32 
     33 import java.util.List;
     34 import java.util.Objects;
     35 
     36 public class AccountSelectionPreference extends ListPreference implements
     37         Preference.OnPreferenceChangeListener {
     38 
     39     public interface AccountSelectionListener {
     40         boolean onAccountSelected(AccountSelectionPreference pref, PhoneAccountHandle account);
     41         void onAccountSelectionDialogShow(AccountSelectionPreference pref);
     42         void onAccountChanged(AccountSelectionPreference pref);
     43     }
     44 
     45     private final Context mContext;
     46     private AccountSelectionListener mListener;
     47     private PhoneAccountHandle[] mAccounts;
     48     private String[] mEntryValues;
     49     private CharSequence[] mEntries;
     50     private boolean mShowSelectionInSummary = true;
     51 
     52     public AccountSelectionPreference(Context context) {
     53         this(context, null);
     54     }
     55 
     56     public AccountSelectionPreference(Context context, AttributeSet attrs) {
     57         super(context, attrs);
     58         mContext = context;
     59         setOnPreferenceChangeListener(this);
     60     }
     61 
     62     public void setListener(AccountSelectionListener listener) {
     63         mListener = listener;
     64     }
     65 
     66     public void setShowSelectionInSummary(boolean value) {
     67         mShowSelectionInSummary = value;
     68     }
     69 
     70     public void setModel(
     71             TelecomManager telecomManager,
     72             List<PhoneAccountHandle> accountsList,
     73             PhoneAccountHandle currentSelection,
     74             CharSequence nullSelectionString) {
     75 
     76         mAccounts = accountsList.toArray(new PhoneAccountHandle[accountsList.size()]);
     77         mEntryValues = new String[mAccounts.length + 1];
     78         mEntries = new CharSequence[mAccounts.length + 1];
     79 
     80         PackageManager pm = mContext.getPackageManager();
     81 
     82         int selectedIndex = mAccounts.length;  // Points to nullSelectionString by default
     83         int i = 0;
     84         for ( ; i < mAccounts.length; i++) {
     85             CharSequence label = telecomManager.getPhoneAccount(mAccounts[i]).getLabel();
     86             if (label != null) {
     87                 label = pm.getUserBadgedLabel(label, mAccounts[i].getUserHandle());
     88             }
     89             mEntries[i] = label == null ? null : label.toString();
     90             mEntryValues[i] = Integer.toString(i);
     91             if (Objects.equals(currentSelection, mAccounts[i])) {
     92                 selectedIndex = i;
     93             }
     94         }
     95         mEntryValues[i] = Integer.toString(i);
     96         mEntries[i] = nullSelectionString;
     97 
     98         setEntryValues(mEntryValues);
     99         setEntries(mEntries);
    100         setValueIndex(selectedIndex);
    101         if (mShowSelectionInSummary) {
    102             setSummary(mEntries[selectedIndex]);
    103         }
    104     }
    105 
    106     @Override
    107     public boolean onPreferenceChange(Preference preference, Object newValue) {
    108         if (mListener != null) {
    109             int index = Integer.parseInt((String) newValue);
    110             PhoneAccountHandle account = index < mAccounts.length ? mAccounts[index] : null;
    111             if (mListener.onAccountSelected(this, account)) {
    112                 if (mShowSelectionInSummary) {
    113                     setSummary(mEntries[index]);
    114                 }
    115                 if (index != findIndexOfValue(getValue())) {
    116                     setValueIndex(index);
    117                     mListener.onAccountChanged(this);
    118                 }
    119                 return true;
    120             }
    121         }
    122         return false;
    123     }
    124 
    125     /**
    126      * Modifies the dialog to change the default "Cancel" button to "Choose Accounts", which
    127      * triggers the {@link PhoneAccountSelectionPreferenceActivity} to be shown.
    128      *
    129      * @param builder The {@code AlertDialog.Builder}.
    130      */
    131     @Override
    132     protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
    133         // Notify the listener that the dialog is about to be built.  This is important so that the
    134         // list of enabled accounts can be updated prior to showing the dialog.
    135         mListener.onAccountSelectionDialogShow(this);
    136 
    137         super.onPrepareDialogBuilder(builder);
    138     }
    139 }
    140