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      1 /*
      2  * Copyright (C) 2014 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 
     17 package com.example.android.apprestrictionenforcer;
     18 
     19 import android.app.Activity;
     20 import android.app.admin.DevicePolicyManager;
     21 import android.content.pm.ApplicationInfo;
     22 import android.content.pm.PackageManager;
     23 import android.os.Bundle;
     24 import android.support.annotation.Nullable;
     25 import android.support.v4.app.Fragment;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 import android.widget.Button;
     30 import android.widget.TextView;
     31 import android.widget.Toast;
     32 
     33 /**
     34  * Provides UI for enabling the target app in this profile. The status of the app can be
     35  * uninstalled, hidden, or enabled depending on the situations. This fragment shows suitable
     36  * controls for each status.
     37  */
     38 public class StatusFragment extends Fragment implements View.OnClickListener {
     39 
     40     private TextView mTextStatus;
     41     private Button mButtonUnhide;
     42     private StatusUpdatedListener mListener;
     43 
     44     @Override
     45     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
     46                              @Nullable Bundle savedInstanceState) {
     47         return inflater.inflate(R.layout.fragment_status, container, false);
     48     }
     49 
     50     @Override
     51     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
     52         mTextStatus = (TextView) view.findViewById(R.id.status);
     53         mButtonUnhide = (Button) view.findViewById(R.id.unhide);
     54         mButtonUnhide.setOnClickListener(this);
     55     }
     56 
     57     @Override
     58     public void onAttach(Activity activity) {
     59         super.onAttach(activity);
     60         mListener = (StatusUpdatedListener) activity;
     61     }
     62 
     63     @Override
     64     public void onDetach() {
     65         mListener = null;
     66         super.onDetach();
     67     }
     68 
     69     @Override
     70     public void onResume() {
     71         super.onResume();
     72         updateUi(getActivity());
     73     }
     74 
     75     @Override
     76     public void onClick(View v) {
     77         switch (v.getId()) {
     78             case R.id.unhide: {
     79                 unhideApp(getActivity());
     80                 break;
     81             }
     82         }
     83     }
     84 
     85     private void updateUi(Activity activity) {
     86         PackageManager packageManager = activity.getPackageManager();
     87         try {
     88             ApplicationInfo info = packageManager.getApplicationInfo(
     89                     Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA,
     90                     PackageManager.GET_UNINSTALLED_PACKAGES);
     91             DevicePolicyManager devicePolicyManager =
     92                     (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
     93             if ((info.flags & ApplicationInfo.FLAG_INSTALLED) != 0) {
     94                 if (!devicePolicyManager.isApplicationHidden(
     95                         EnforcerDeviceAdminReceiver.getComponentName(activity),
     96                         Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA)) {
     97                     // The app is ready to enforce restrictions
     98                     // This is unlikely to happen in this sample as unhideApp() handles it.
     99                     mListener.onStatusUpdated();
    100                 } else {
    101                     // The app is installed but hidden in this profile
    102                     mTextStatus.setText(R.string.status_not_activated);
    103                     mButtonUnhide.setVisibility(View.VISIBLE);
    104                 }
    105             } else {
    106                 // Need to reinstall the sample app
    107                 mTextStatus.setText(R.string.status_need_reinstall);
    108                 mButtonUnhide.setVisibility(View.GONE);
    109             }
    110         } catch (PackageManager.NameNotFoundException e) {
    111             // Need to reinstall the sample app
    112             mTextStatus.setText(R.string.status_need_reinstall);
    113             mButtonUnhide.setVisibility(View.GONE);
    114         }
    115     }
    116 
    117     /**
    118      * Unhides the AppRestrictionSchema sample in case it is hidden in this profile.
    119      *
    120      * @param activity The activity
    121      */
    122     private void unhideApp(Activity activity) {
    123         DevicePolicyManager devicePolicyManager =
    124                 (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
    125         devicePolicyManager.setApplicationHidden(
    126                 EnforcerDeviceAdminReceiver.getComponentName(activity),
    127                 Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA, false);
    128         Toast.makeText(activity, "Enabled the app", Toast.LENGTH_SHORT).show();
    129         mListener.onStatusUpdated();
    130     }
    131 
    132     public interface StatusUpdatedListener {
    133         public void onStatusUpdated();
    134     }
    135 
    136 }
    137