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      1 /*
      2  * Copyright (C) 2018 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.nfc;
     18 
     19 import android.content.Context;
     20 import android.nfc.NfcAdapter;
     21 import android.os.UserHandle;
     22 import android.os.UserManager;
     23 
     24 import com.android.settings.R;
     25 import com.android.settingslib.RestrictedLockUtils;
     26 import com.android.settingslib.RestrictedPreference;
     27 
     28 /**
     29  * AndroidBeanEnabler is a helper to manage the Android Beam preference. It turns on/off
     30  * Android Beam and ensures the summary of the preference reflects the current state.
     31  */
     32 public class AndroidBeamEnabler extends BaseNfcEnabler {
     33     private final boolean mBeamDisallowedBySystem;
     34     private final RestrictedPreference mPreference;
     35 
     36     public AndroidBeamEnabler(Context context, RestrictedPreference preference) {
     37         super(context);
     38         mPreference = preference;
     39         mBeamDisallowedBySystem = RestrictedLockUtils.hasBaseUserRestriction(context,
     40                 UserManager.DISALLOW_OUTGOING_BEAM, UserHandle.myUserId());
     41         if (!isNfcAvailable()) {
     42             // NFC is not supported
     43             mPreference.setEnabled(false);
     44             return;
     45         }
     46         if (mBeamDisallowedBySystem) {
     47             mPreference.setEnabled(false);
     48         }
     49     }
     50 
     51     @Override
     52     protected void handleNfcStateChanged(int newState) {
     53         switch (newState) {
     54             case NfcAdapter.STATE_OFF:
     55                 mPreference.setEnabled(false);
     56                 mPreference.setSummary(R.string.android_beam_disabled_summary);
     57                 break;
     58             case NfcAdapter.STATE_ON:
     59                 if (mBeamDisallowedBySystem) {
     60                     mPreference.setDisabledByAdmin(null);
     61                     mPreference.setEnabled(false);
     62                 } else {
     63                     mPreference.checkRestrictionAndSetDisabled(UserManager.DISALLOW_OUTGOING_BEAM);
     64                 }
     65                 if (mNfcAdapter.isNdefPushEnabled() && mPreference.isEnabled()) {
     66                     mPreference.setSummary(R.string.android_beam_on_summary);
     67                 } else {
     68                     mPreference.setSummary(R.string.android_beam_off_summary);
     69                 }
     70                 break;
     71             case NfcAdapter.STATE_TURNING_ON:
     72                 mPreference.setEnabled(false);
     73                 break;
     74             case NfcAdapter.STATE_TURNING_OFF:
     75                 mPreference.setEnabled(false);
     76                 break;
     77         }
     78     }
     79 }
     80