1 /*
2  * Copyright (C) 2015 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.example.android.nfcprovisioning;
18 
19 import android.text.Editable;
20 import android.text.TextWatcher;
21 
22 /**
23  * This class wraps {@link TextWatcher} and delegates {@link TextWatcher#afterTextChanged} event to
24  * {@link OnTextChangedListener} while hiding all other unnecessary events.
25  */
26 public class TextWatcherWrapper implements TextWatcher {
27 
28     private final int mId;
29     private final OnTextChangedListener mListener;
30 
TextWatcherWrapper(int id, OnTextChangedListener listener)31     public TextWatcherWrapper(int id, OnTextChangedListener listener) {
32         mId = id;
33         mListener = listener;
34     }
35 
36     @Override
beforeTextChanged(CharSequence s, int start, int count, int after)37     public void beforeTextChanged(CharSequence s, int start, int count, int after) {
38         // Ignore
39     }
40 
41     @Override
onTextChanged(CharSequence s, int start, int before, int count)42     public void onTextChanged(CharSequence s, int start, int before, int count) {
43         // Ignore
44     }
45 
46     @Override
afterTextChanged(Editable s)47     public void afterTextChanged(Editable s) {
48         mListener.onTextChanged(mId, s.toString());
49     }
50 
51     public interface OnTextChangedListener {
onTextChanged(int id, String s)52         public void onTextChanged(int id, String s);
53     }
54 
55 }
56