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      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.android.phone.settings;
     18 
     19 import android.content.Context;
     20 import android.media.AudioManager;
     21 import android.os.Bundle;
     22 import android.preference.CheckBoxPreference;
     23 import android.preference.Preference;
     24 import android.preference.PreferenceFragment;
     25 import android.preference.PreferenceScreen;
     26 import android.provider.Settings;
     27 import android.telecom.TelecomManager;
     28 import android.telephony.CarrierConfigManager;
     29 import android.telephony.PhoneStateListener;
     30 import android.telephony.TelephonyManager;
     31 import android.util.Log;
     32 
     33 import com.android.ims.ImsManager;
     34 import com.android.phone.PhoneGlobals;
     35 import com.android.phone.R;
     36 import com.android.phone.settings.TtyModeListPreference;
     37 
     38 public class AccessibilitySettingsFragment extends PreferenceFragment {
     39     private static final String LOG_TAG = AccessibilitySettingsFragment.class.getSimpleName();
     40     private static final boolean DBG = (PhoneGlobals.DBG_LEVEL >= 2);
     41 
     42     private static final String BUTTON_TTY_KEY = "button_tty_mode_key";
     43     private static final String BUTTON_HAC_KEY = "button_hac_key";
     44 
     45     private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
     46         /**
     47          * Disable the TTY setting when in/out of a call (and if carrier doesn't
     48          * support VoLTE with TTY).
     49          * @see android.telephony.PhoneStateListener#onCallStateChanged(int,
     50          * java.lang.String)
     51          */
     52         @Override
     53         public void onCallStateChanged(int state, String incomingNumber) {
     54             if (DBG) Log.d(LOG_TAG, "PhoneStateListener.onCallStateChanged: state=" + state);
     55             Preference pref = getPreferenceScreen().findPreference(BUTTON_TTY_KEY);
     56             if (pref != null) {
     57                 pref.setEnabled(state == TelephonyManager.CALL_STATE_IDLE);
     58             }
     59         }
     60     };
     61 
     62     private Context mContext;
     63     private AudioManager mAudioManager;
     64 
     65     private TtyModeListPreference mButtonTty;
     66     private CheckBoxPreference mButtonHac;
     67 
     68     @Override
     69     public void onCreate(Bundle savedInstanceState) {
     70         super.onCreate(savedInstanceState);
     71 
     72         mContext = getActivity().getApplicationContext();
     73         mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
     74 
     75         addPreferencesFromResource(R.xml.accessibility_settings);
     76 
     77         mButtonTty = (TtyModeListPreference) findPreference(
     78                 getResources().getString(R.string.tty_mode_key));
     79         mButtonHac = (CheckBoxPreference) findPreference(BUTTON_HAC_KEY);
     80 
     81         if (PhoneGlobals.getInstance().phoneMgr.isTtyModeSupported()) {
     82             mButtonTty.init();
     83         } else {
     84             getPreferenceScreen().removePreference(mButtonTty);
     85             mButtonTty = null;
     86         }
     87 
     88         if (PhoneGlobals.getInstance().phoneMgr.isHearingAidCompatibilitySupported()) {
     89             int hac = Settings.System.getInt(mContext.getContentResolver(),
     90                     Settings.System.HEARING_AID, SettingsConstants.HAC_DISABLED);
     91             mButtonHac.setChecked(hac == SettingsConstants.HAC_ENABLED);
     92         } else {
     93             getPreferenceScreen().removePreference(mButtonHac);
     94             mButtonHac = null;
     95         }
     96     }
     97 
     98     @Override
     99     public void onResume() {
    100         super.onResume();
    101 
    102         if (ImsManager.isVolteEnabledByPlatform(mContext) && !getVolteTtySupported()) {
    103             TelephonyManager tm =
    104                     (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
    105             tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
    106         }
    107     }
    108 
    109     @Override
    110     public void onPause() {
    111         super.onPause();
    112 
    113         if (ImsManager.isVolteEnabledByPlatform(mContext) && !getVolteTtySupported()) {
    114             TelephonyManager tm =
    115                     (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
    116             tm.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
    117         }
    118     }
    119 
    120     @Override
    121     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
    122         if (preference == mButtonTty) {
    123             return true;
    124         } else if (preference == mButtonHac) {
    125             int hac = mButtonHac.isChecked()
    126                     ? SettingsConstants.HAC_ENABLED : SettingsConstants.HAC_DISABLED;
    127             // Update HAC value in Settings database.
    128             Settings.System.putInt(mContext.getContentResolver(), Settings.System.HEARING_AID, hac);
    129 
    130             // Update HAC Value in AudioManager.
    131             mAudioManager.setParameter(SettingsConstants.HAC_KEY,
    132                     hac == SettingsConstants.HAC_ENABLED
    133                             ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF);
    134             return true;
    135         }
    136         return false;
    137     }
    138 
    139     private boolean getVolteTtySupported() {
    140         CarrierConfigManager configManager =
    141                 (CarrierConfigManager) mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE);
    142         return configManager.getConfig().getBoolean(
    143                 CarrierConfigManager.KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL);
    144     }
    145 }
    146