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      1 /*
      2  * Copyright (C) 2008 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;
     18 
     19 import android.app.AlertDialog;
     20 import android.content.Context;
     21 import android.preference.EditTextPreference;
     22 import android.text.method.DigitsKeyListener;
     23 import android.text.method.PasswordTransformationMethod;
     24 import android.util.AttributeSet;
     25 import android.view.View;
     26 import android.widget.EditText;
     27 
     28 import java.util.Map;
     29 
     30 /**
     31  * Class similar to the com.android.settings.EditPinPreference
     32  * class, with a couple of modifications, including a different layout
     33  * for the dialog.
     34  */
     35 public class EditPinPreference extends EditTextPreference {
     36 
     37     private boolean shouldHideButtons;
     38 
     39     interface OnPinEnteredListener {
     40         void onPinEntered(EditPinPreference preference, boolean positiveResult);
     41     }
     42 
     43     private OnPinEnteredListener mPinListener;
     44 
     45     public void setOnPinEnteredListener(OnPinEnteredListener listener) {
     46         mPinListener = listener;
     47     }
     48 
     49     public EditPinPreference(Context context, AttributeSet attrs) {
     50         super(context, attrs);
     51     }
     52 
     53     public EditPinPreference(Context context, AttributeSet attrs, int defStyle) {
     54         super(context, attrs, defStyle);
     55     }
     56 
     57     /**
     58      * Overridden to setup the correct dialog layout, as well as setting up
     59      * other properties for the pin / puk entry field.
     60      */
     61     @Override
     62     protected View onCreateDialogView() {
     63         // set the dialog layout
     64         setDialogLayoutResource(R.layout.pref_dialog_editpin);
     65 
     66         View dialog = super.onCreateDialogView();
     67 
     68         // set the transformation method and the key listener to ensure
     69         // correct input and presentation of the pin / puk.
     70         final EditText textfield = getEditText();
     71         textfield.setTransformationMethod(PasswordTransformationMethod.getInstance());
     72         textfield.setKeyListener(DigitsKeyListener.getInstance());
     73 
     74         return dialog;
     75     }
     76 
     77     @Override
     78     protected void onBindDialogView(View view) {
     79         super.onBindDialogView(view);
     80 
     81         // If the layout does not contain an edittext, hide the buttons.
     82         shouldHideButtons = (view.findViewById(android.R.id.edit) == null);
     83     }
     84 
     85     @Override
     86     protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
     87         super.onPrepareDialogBuilder(builder);
     88 
     89         // hide the buttons if we need to.
     90         if (shouldHideButtons) {
     91             builder.setPositiveButton(null, this);
     92             builder.setNegativeButton(null, this);
     93         }
     94     }
     95 
     96     @Override
     97     protected void onDialogClosed(boolean positiveResult) {
     98         super.onDialogClosed(positiveResult);
     99         if (mPinListener != null) {
    100             mPinListener.onPinEntered(this, positiveResult);
    101         }
    102     }
    103 
    104     /**
    105      * Externally visible method to bring up the dialog to
    106      * for multi-step / multi-dialog requests (like changing
    107      * the SIM pin).
    108      */
    109     public void showPinDialog() {
    110         showDialog(null);
    111     }
    112 }
    113