1 /*
2  * Copyright (C) 2019 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.settings.development.bluetooth;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.util.Log;
22 import android.view.View;
23 import android.widget.RadioButton;
24 import android.widget.RadioGroup;
25 import android.widget.TextView;
26 
27 import com.android.settings.R;
28 import com.android.settingslib.CustomDialogPreferenceCompat;
29 
30 import java.util.ArrayList;
31 import java.util.List;
32 
33 /**
34  * Abstract class for Bluetooth A2DP config preference in developer option.
35  */
36 public abstract class BaseBluetoothDialogPreference extends CustomDialogPreferenceCompat implements
37         RadioGroup.OnCheckedChangeListener{
38     private static final String TAG = "BaseBluetoothDlgPref";
39 
40     protected List<Integer> mRadioButtonIds = new ArrayList<>();
41     protected List<String> mRadioButtonStrings = new ArrayList<>();
42     protected List<String> mSummaryStrings = new ArrayList<>();
43 
44     private Callback mCallback;
45 
BaseBluetoothDialogPreference(Context context)46     public BaseBluetoothDialogPreference(Context context) {
47         super(context);
48     }
49 
BaseBluetoothDialogPreference(Context context, AttributeSet attrs)50     public BaseBluetoothDialogPreference(Context context, AttributeSet attrs) {
51         super(context, attrs);
52     }
53 
BaseBluetoothDialogPreference(Context context, AttributeSet attrs, int defStyleAttr)54     public BaseBluetoothDialogPreference(Context context, AttributeSet attrs, int defStyleAttr) {
55         super(context, attrs, defStyleAttr);
56     }
57 
BaseBluetoothDialogPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)58     public BaseBluetoothDialogPreference(Context context, AttributeSet attrs, int defStyleAttr,
59             int defStyleRes) {
60         super(context, attrs, defStyleAttr, defStyleRes);
61     }
62 
63     @Override
onBindDialogView(View view)64     protected void onBindDialogView(View view) {
65         super.onBindDialogView(view);
66         if (mCallback == null) {
67             Log.e(TAG, "Unable to show dialog by the callback is null");
68             return;
69         }
70         if (mRadioButtonStrings.size() != mRadioButtonIds.size()) {
71             Log.e(TAG, "Unable to show dialog by the view and string size are not matched");
72             return;
73         }
74         final int currentIndex = mCallback.getCurrentConfigIndex();
75         if (currentIndex < 0 || currentIndex >= mRadioButtonIds.size()) {
76             Log.e(TAG, "Unable to show dialog by the incorrect index: " + currentIndex);
77             return;
78         }
79         // Initial radio button group
80         final RadioGroup radioGroup = view.findViewById(getRadioButtonGroupId());
81         if (radioGroup == null) {
82             Log.e(TAG, "Unable to show dialog by no radio button group: "
83                     + getRadioButtonGroupId());
84             return;
85         }
86         radioGroup.check(mRadioButtonIds.get(currentIndex));
87         radioGroup.setOnCheckedChangeListener(this);
88         // Initial radio button
89         final List<Integer> selectableIndex = mCallback.getSelectableIndex();
90         RadioButton radioButton;
91         for (int i = 0; i < mRadioButtonStrings.size(); i++) {
92             radioButton = view.findViewById(mRadioButtonIds.get(i));
93             if (radioButton == null) {
94                 Log.e(TAG, "Unable to show dialog by no radio button:" + mRadioButtonIds.get(i));
95                 return;
96             }
97             radioButton.setText(mRadioButtonStrings.get(i));
98             radioButton.setEnabled(selectableIndex.contains(i));
99         }
100         // Initial help information text view
101         final TextView helpTextView = view.findViewById(R.id.bluetooth_audio_codec_help_info);
102         if (selectableIndex.size() == mRadioButtonIds.size()) {
103             // View will be invisible when all options are enabled.
104             helpTextView.setVisibility(View.GONE);
105         } else {
106             helpTextView.setText(
107                     com.android.settingslib.R.string.bluetooth_select_a2dp_codec_type_help_info);
108             helpTextView.setVisibility(View.VISIBLE);
109         }
110     }
111 
112     @Override
onCheckedChanged(RadioGroup group, int checkedId)113     public void onCheckedChanged(RadioGroup group, int checkedId) {
114         if (mCallback == null) {
115             Log.e(TAG, "Callback is null");
116             return;
117         }
118         mCallback.onIndexUpdated(mRadioButtonIds.indexOf(checkedId));
119         getDialog().dismiss();
120     }
121 
122     /**
123      * Method to set callback.
124      */
setCallback(Callback callback)125     public void setCallback(Callback callback) {
126         mCallback = callback;
127     }
128 
129     /**
130      * Method to get summary strings by index.
131      */
generateSummary(int index)132     protected String generateSummary(int index) {
133         if (index > mSummaryStrings.size()) {
134             Log.e(TAG, "Unable to get summary of " + index + ". Size is " + mSummaryStrings.size());
135             return null;
136         }
137         return index == getDefaultIndex() ? mSummaryStrings.get(getDefaultIndex()) :
138                 String.format(getContext().getResources().getString(
139                         com.android.settingslib.R
140                                 .string.bluetooth_select_a2dp_codec_streaming_label),
141                         mSummaryStrings.get(index));
142     }
143 
144     /**
145      * Method to get default index.
146      */
getDefaultIndex()147     protected int getDefaultIndex() {
148         return 0;
149     }
150 
151     /**
152      * Method to get radio button group id.
153      */
getRadioButtonGroupId()154     protected abstract int getRadioButtonGroupId();
155 
156     /**
157      * Callback interface for this class to manipulate data from controller.
158      */
159     public interface Callback {
160         /**
161          * Method to get current Bluetooth A2DP config index.
162          */
getCurrentConfigIndex()163         int getCurrentConfigIndex();
164         /**
165          * Method to get selectable config index which means supported by phone and device.
166          *
167          * @return the available {@link List} of the Bluetooth A2DP config.
168          */
getSelectableIndex()169         List<Integer> getSelectableIndex();
170         /**
171          * Method to notify controller when user changes config.
172          *
173          * @param index for the selected index.
174          */
onIndexUpdated(int index)175         void onIndexUpdated(int index);
176     }
177 }
178