Home | History | Annotate | Download | only in apprestrictionenforcer 
      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.Build;
     24 import android.os.Bundle;
     25 import android.support.annotation.Nullable;
     26 import android.support.v4.app.Fragment;
     27 import android.view.LayoutInflater;
     28 import android.view.View;
     29 import android.view.ViewGroup;
     30 import android.widget.Button;
     31 import android.widget.TextView;
     32 import android.widget.Toast;
     33 
     34 /**
     35  * Provides UI for enabling the target app in this profile. The status of the app can be
     36  * uninstalled, hidden, or enabled depending on the situations. This fragment shows suitable
     37  * controls for each status.
     38  */
     39 public class StatusFragment extends Fragment implements View.OnClickListener {
     40 
     41     private TextView mTextStatus;
     42     private Button mButtonUnhide;
     43     private StatusUpdatedListener mListener;
     44 
     45     @Override
     46     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
     47                              @Nullable Bundle savedInstanceState) {
     48         return inflater.inflate(R.layout.fragment_status, container, false);
     49     }
     50 
     51     @Override
     52     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
     53         mTextStatus = (TextView) view.findViewById(R.id.status);
     54         mButtonUnhide = (Button) view.findViewById(R.id.unhide);
     55         mButtonUnhide.setOnClickListener(this);
     56     }
     57 
     58     @Override
     59     public void onAttach(Activity activity) {
     60         super.onAttach(activity);
     61         mListener = (StatusUpdatedListener) activity;
     62     }
     63 
     64     @Override
     65     public void onDetach() {
     66         mListener = null;
     67         super.onDetach();
     68     }
     69 
     70     @Override
     71     public void onResume() {
     72         super.onResume();
     73         updateUi(getActivity());
     74     }
     75 
     76     @Override
     77     public void onClick(View v) {
     78         switch (v.getId()) {
     79             case R.id.unhide: {
     80                 unhideApp(getActivity());
     81                 break;
     82             }
     83         }
     84     }
     85 
     86     private void updateUi(Activity activity) {
     87         PackageManager packageManager = activity.getPackageManager();
     88         try {
     89             int packageFlags;
     90             if (Build.VERSION.SDK_INT < 24) {
     91                 //noinspection deprecation
     92                 packageFlags = PackageManager.GET_UNINSTALLED_PACKAGES;
     93             } else {
     94                 packageFlags = PackageManager.MATCH_UNINSTALLED_PACKAGES;
     95             }
     96             ApplicationInfo info = packageManager.getApplicationInfo(
     97                     Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA,
     98                     packageFlags);
     99             DevicePolicyManager devicePolicyManager =
    100                     (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
    101             if ((info.flags & ApplicationInfo.FLAG_INSTALLED) != 0) {
    102                 if (!devicePolicyManager.isApplicationHidden(
    103                         EnforcerDeviceAdminReceiver.getComponentName(activity),
    104                         Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA)) {
    105                     // The app is ready to enforce restrictions
    106                     // This is unlikely to happen in this sample as unhideApp() handles it.
    107                     mListener.onStatusUpdated();
    108                 } else {
    109                     // The app is installed but hidden in this profile
    110                     mTextStatus.setText(R.string.status_not_activated);
    111                     mButtonUnhide.setVisibility(View.VISIBLE);
    112                 }
    113             } else {
    114                 // Need to reinstall the sample app
    115                 mTextStatus.setText(R.string.status_need_reinstall);
    116                 mButtonUnhide.setVisibility(View.GONE);
    117             }
    118         } catch (PackageManager.NameNotFoundException e) {
    119             // Need to reinstall the sample app
    120             mTextStatus.setText(R.string.status_need_reinstall);
    121             mButtonUnhide.setVisibility(View.GONE);
    122         }
    123     }
    124 
    125     /**
    126      * Unhides the AppRestrictionSchema sample in case it is hidden in this profile.
    127      *
    128      * @param activity The activity
    129      */
    130     private void unhideApp(Activity activity) {
    131         DevicePolicyManager devicePolicyManager =
    132                 (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
    133         devicePolicyManager.setApplicationHidden(
    134                 EnforcerDeviceAdminReceiver.getComponentName(activity),
    135                 Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA, false);
    136         Toast.makeText(activity, "Enabled the app", Toast.LENGTH_SHORT).show();
    137         mListener.onStatusUpdated();
    138     }
    139 
    140     public interface StatusUpdatedListener {
    141         public void onStatusUpdated();
    142     }
    143 
    144 }
    145