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