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