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      1 /*
      2  * Copyright (C) 2017 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 package com.android.settings.deviceinfo;
     17 
     18 import android.content.Context;
     19 import android.content.Intent;
     20 import android.os.Build;
     21 import android.os.SystemClock;
     22 import android.os.UserHandle;
     23 import android.os.UserManager;
     24 import android.support.v7.preference.Preference;
     25 import android.support.v7.preference.PreferenceScreen;
     26 import android.text.TextUtils;
     27 import android.util.Log;
     28 
     29 import com.android.settings.core.PreferenceController;
     30 import com.android.settings.core.lifecycle.Lifecycle;
     31 import com.android.settings.core.lifecycle.LifecycleObserver;
     32 import com.android.settings.core.lifecycle.events.OnResume;
     33 import com.android.settingslib.RestrictedLockUtils;
     34 
     35 
     36 public class FirmwareVersionPreferenceController extends PreferenceController
     37         implements LifecycleObserver, OnResume {
     38 
     39     private static final String TAG = "FirmwareVersionPref";
     40     private static final String KEY_FIRMWARE_VERSION = "firmware_version";
     41 
     42     private final UserManager mUserManager;
     43 
     44     private RestrictedLockUtils.EnforcedAdmin mFunDisallowedAdmin;
     45     private boolean mFunDisallowedBySystem;
     46 
     47     private long[] mHits = new long[3];
     48 
     49     public FirmwareVersionPreferenceController(Context context, Lifecycle lifecycle) {
     50         super(context);
     51         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
     52         if (lifecycle != null) {
     53             lifecycle.addObserver(this);
     54         }
     55     }
     56 
     57     @Override
     58     public boolean isAvailable() {
     59         return true;
     60     }
     61 
     62     @Override
     63     public void displayPreference(PreferenceScreen screen) {
     64         super.displayPreference(screen);
     65         final Preference pref = screen.findPreference(KEY_FIRMWARE_VERSION);
     66         if (pref != null) {
     67             pref.setSummary(Build.VERSION.RELEASE);
     68         }
     69     }
     70 
     71     @Override
     72     public String getPreferenceKey() {
     73         return KEY_FIRMWARE_VERSION;
     74     }
     75 
     76     @Override
     77     public void onResume() {
     78         mFunDisallowedAdmin = RestrictedLockUtils.checkIfRestrictionEnforced(
     79                 mContext, UserManager.DISALLOW_FUN, UserHandle.myUserId());
     80         mFunDisallowedBySystem = RestrictedLockUtils.hasBaseUserRestriction(
     81                 mContext, UserManager.DISALLOW_FUN, UserHandle.myUserId());
     82     }
     83 
     84     @Override
     85     public boolean handlePreferenceTreeClick(Preference preference) {
     86         if (!TextUtils.equals(preference.getKey(), KEY_FIRMWARE_VERSION)) {
     87             return false;
     88         }
     89         System.arraycopy(mHits, 1, mHits, 0, mHits.length - 1);
     90         mHits[mHits.length - 1] = SystemClock.uptimeMillis();
     91         if (mHits[0] >= (SystemClock.uptimeMillis() - 500)) {
     92             if (mUserManager.hasUserRestriction(UserManager.DISALLOW_FUN)) {
     93                 if (mFunDisallowedAdmin != null && !mFunDisallowedBySystem) {
     94                     RestrictedLockUtils.sendShowAdminSupportDetailsIntent(mContext,
     95                             mFunDisallowedAdmin);
     96                 }
     97                 Log.d(TAG, "Sorry, no fun for you!");
     98                 return false;
     99             }
    100 
    101             final Intent intent = new Intent(Intent.ACTION_MAIN)
    102                     .setClassName(
    103                             "android", com.android.internal.app.PlatLogoActivity.class.getName());
    104             try {
    105                 mContext.startActivity(intent);
    106                 return true;
    107             } catch (Exception e) {
    108                 Log.e(TAG, "Unable to start activity " + intent.toString());
    109             }
    110         }
    111         return false;
    112     }
    113 }
    114