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 */ 16package com.android.settings.deviceinfo; 17 18import android.content.Context; 19import android.content.pm.PackageManager; 20import android.support.v7.preference.Preference; 21import android.support.v7.preference.PreferenceScreen; 22import android.text.TextUtils; 23import android.util.Log; 24 25import com.android.settings.core.PreferenceControllerMixin; 26import com.android.settingslib.DeviceInfoUtils; 27import com.android.settingslib.core.AbstractPreferenceController; 28 29public class SecurityPatchPreferenceController extends AbstractPreferenceController implements 30 PreferenceControllerMixin { 31 32 private static final String KEY_SECURITY_PATCH = "security_patch"; 33 private static final String TAG = "SecurityPatchPref"; 34 35 private final String mPatch; 36 private final PackageManager mPackageManager; 37 38 public SecurityPatchPreferenceController(Context context) { 39 super(context); 40 mPackageManager = mContext.getPackageManager(); 41 mPatch = DeviceInfoUtils.getSecurityPatch(); 42 } 43 44 @Override 45 public boolean isAvailable() { 46 return !TextUtils.isEmpty(mPatch); 47 } 48 49 @Override 50 public String getPreferenceKey() { 51 return KEY_SECURITY_PATCH; 52 } 53 54 @Override 55 public void displayPreference(PreferenceScreen screen) { 56 super.displayPreference(screen); 57 final Preference pref = screen.findPreference(KEY_SECURITY_PATCH); 58 if (pref != null) { 59 pref.setSummary(mPatch); 60 } 61 } 62 63 @Override 64 public boolean handlePreferenceTreeClick(Preference preference) { 65 if (!TextUtils.equals(preference.getKey(), KEY_SECURITY_PATCH)) { 66 return false; 67 } 68 if (mPackageManager.queryIntentActivities(preference.getIntent(), 0).isEmpty()) { 69 // Don't send out the intent to stop crash 70 Log.w(TAG, "Stop click action on " + KEY_SECURITY_PATCH + ": " 71 + "queryIntentActivities() returns empty"); 72 return true; 73 } 74 return false; 75 } 76} 77