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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.applications.appinfo;
     17 
     18 import static android.app.Activity.RESULT_CANCELED;
     19 import static android.app.Activity.RESULT_OK;
     20 
     21 import android.app.AlertDialog;
     22 import android.app.AppOpsManager;
     23 import android.content.Context;
     24 import android.os.Bundle;
     25 import android.os.UserHandle;
     26 import android.os.UserManager;
     27 import android.support.v7.preference.Preference;
     28 import android.support.v7.preference.Preference.OnPreferenceChangeListener;
     29 
     30 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     31 import com.android.settings.R;
     32 import com.android.settings.Settings;
     33 import com.android.settings.applications.AppInfoWithHeader;
     34 import com.android.settings.applications.AppStateInstallAppsBridge;
     35 import com.android.settings.applications.AppStateInstallAppsBridge.InstallAppsState;
     36 import com.android.settingslib.RestrictedSwitchPreference;
     37 import com.android.settingslib.applications.ApplicationsState.AppEntry;
     38 
     39 public class ExternalSourcesDetails extends AppInfoWithHeader
     40         implements OnPreferenceChangeListener {
     41 
     42     private static final String KEY_EXTERNAL_SOURCE_SWITCH = "external_sources_settings_switch";
     43 
     44     private AppStateInstallAppsBridge mAppBridge;
     45     private AppOpsManager mAppOpsManager;
     46     private UserManager mUserManager;
     47     private RestrictedSwitchPreference mSwitchPref;
     48     private InstallAppsState mInstallAppsState;
     49 
     50     @Override
     51     public void onCreate(Bundle savedInstanceState) {
     52         super.onCreate(savedInstanceState);
     53 
     54         final Context context = getActivity();
     55         mAppBridge = new AppStateInstallAppsBridge(context, mState, null);
     56         mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
     57         mUserManager = UserManager.get(context);
     58 
     59         addPreferencesFromResource(R.xml.external_sources_details);
     60         mSwitchPref = (RestrictedSwitchPreference) findPreference(KEY_EXTERNAL_SOURCE_SWITCH);
     61         mSwitchPref.setOnPreferenceChangeListener(this);
     62     }
     63 
     64     @Override
     65     public boolean onPreferenceChange(Preference preference, Object newValue) {
     66         final boolean checked = (Boolean) newValue;
     67         if (preference == mSwitchPref) {
     68             if (mInstallAppsState != null && checked != mInstallAppsState.canInstallApps()) {
     69                 if (Settings.ManageAppExternalSourcesActivity.class.getName().equals(
     70                         getIntent().getComponent().getClassName())) {
     71                     setResult(checked ? RESULT_OK : RESULT_CANCELED);
     72                 }
     73                 setCanInstallApps(checked);
     74                 refreshUi();
     75             }
     76             return true;
     77         }
     78         return false;
     79     }
     80 
     81     public static CharSequence getPreferenceSummary(Context context, AppEntry entry) {
     82         final UserManager um = UserManager.get(context);
     83         final int userRestrictionSource = um.getUserRestrictionSource(
     84                 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
     85                 UserHandle.getUserHandleForUid(entry.info.uid));
     86         switch (userRestrictionSource) {
     87             case UserManager.RESTRICTION_SOURCE_DEVICE_OWNER:
     88             case UserManager.RESTRICTION_SOURCE_PROFILE_OWNER:
     89                 return context.getString(R.string.disabled_by_admin);
     90             case UserManager.RESTRICTION_SOURCE_SYSTEM:
     91                 return context.getString(R.string.disabled);
     92         }
     93 
     94         final InstallAppsState appsState = new AppStateInstallAppsBridge(context, null, null)
     95                 .createInstallAppsStateFor(entry.info.packageName, entry.info.uid);
     96 
     97         return context.getString(appsState.canInstallApps()
     98                 ? R.string.app_permission_summary_allowed
     99                 : R.string.app_permission_summary_not_allowed);
    100     }
    101 
    102     private void setCanInstallApps(boolean newState) {
    103         mAppOpsManager.setMode(AppOpsManager.OP_REQUEST_INSTALL_PACKAGES,
    104                 mPackageInfo.applicationInfo.uid, mPackageName,
    105                 newState ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
    106     }
    107 
    108     @Override
    109     protected boolean refreshUi() {
    110         if (mPackageInfo == null || mPackageInfo.applicationInfo == null) {
    111             return false;
    112         }
    113         if (mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
    114                 UserHandle.of(UserHandle.myUserId()))) {
    115             mSwitchPref.setChecked(false);
    116             mSwitchPref.setSummary(R.string.disabled);
    117             mSwitchPref.setEnabled(false);
    118             return true;
    119         }
    120         mSwitchPref.checkRestrictionAndSetDisabled(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES);
    121         if (mSwitchPref.isDisabledByAdmin()) {
    122             return true;
    123         }
    124         mInstallAppsState = mAppBridge.createInstallAppsStateFor(mPackageName,
    125                 mPackageInfo.applicationInfo.uid);
    126         if (!mInstallAppsState.isPotentialAppSource()) {
    127             // Invalid app entry. Should not allow changing permission
    128             mSwitchPref.setEnabled(false);
    129             return true;
    130         }
    131         mSwitchPref.setChecked(mInstallAppsState.canInstallApps());
    132         return true;
    133     }
    134 
    135     @Override
    136     protected AlertDialog createDialog(int id, int errorCode) {
    137         return null;
    138     }
    139 
    140     @Override
    141     public int getMetricsCategory() {
    142         return MetricsEvent.MANAGE_EXTERNAL_SOURCES;
    143     }
    144 }
    145