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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.apprestrictionschema;
     18 
     19 import android.content.Context;
     20 import android.content.RestrictionEntry;
     21 import android.content.RestrictionsManager;
     22 import android.os.Build;
     23 import android.os.Bundle;
     24 import android.os.Parcelable;
     25 import android.support.annotation.Nullable;
     26 import android.support.v4.app.Fragment;
     27 import android.text.TextUtils;
     28 import android.view.LayoutInflater;
     29 import android.view.View;
     30 import android.view.ViewGroup;
     31 import android.widget.Button;
     32 import android.widget.TextView;
     33 import android.widget.Toast;
     34 
     35 import com.example.android.common.logger.Log;
     36 
     37 import java.util.List;
     38 
     39 /**
     40  * Pressing the button on this fragment pops up a simple Toast message. The button is enabled or
     41  * disabled according to the restrictions set by device/profile owner. You can use the
     42  * AppRestrictionEnforcer sample as a profile owner for this.
     43  */
     44 public class AppRestrictionSchemaFragment extends Fragment implements View.OnClickListener {
     45 
     46     // Tag for the logger
     47     private static final String TAG = "AppRestrictionSchemaFragment";
     48 
     49     private static final String KEY_CAN_SAY_HELLO = "can_say_hello";
     50     private static final String KEY_MESSAGE = "message";
     51     private static final String KEY_NUMBER = "number";
     52     private static final String KEY_RANK = "rank";
     53     private static final String KEY_APPROVALS = "approvals";
     54     private static final String KEY_ITEMS = "items";
     55     private static final String KEY_ITEM_KEY = "key";
     56     private static final String KEY_ITEM_VALUE = "value";
     57 
     58     private static final boolean BUNDLE_SUPPORTED = Build.VERSION.SDK_INT >= 23;
     59 
     60     // Message to show when the button is clicked (String restriction)
     61     private String mMessage;
     62 
     63     // UI Components
     64     private TextView mTextSayHello;
     65     private Button mButtonSayHello;
     66     private TextView mTextNumber;
     67     private TextView mTextRank;
     68     private TextView mTextApprovals;
     69     private TextView mTextItems;
     70 
     71     @Override
     72     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
     73                              @Nullable Bundle savedInstanceState) {
     74         return inflater.inflate(R.layout.fragment_app_restriction_schema, container, false);
     75     }
     76 
     77     @Override
     78     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
     79         mTextSayHello = (TextView) view.findViewById(R.id.say_hello_explanation);
     80         mButtonSayHello = (Button) view.findViewById(R.id.say_hello);
     81         mTextNumber = (TextView) view.findViewById(R.id.your_number);
     82         mTextRank = (TextView) view.findViewById(R.id.your_rank);
     83         mTextApprovals = (TextView) view.findViewById(R.id.approvals_you_have);
     84         mTextItems = (TextView) view.findViewById(R.id.your_items);
     85         mButtonSayHello.setOnClickListener(this);
     86         if (BUNDLE_SUPPORTED) {
     87             mTextItems.setVisibility(View.VISIBLE);
     88         } else {
     89             mTextItems.setVisibility(View.GONE);
     90         }
     91     }
     92 
     93     @Override
     94     public void onResume() {
     95         super.onResume();
     96         resolveRestrictions();
     97     }
     98 
     99     private void resolveRestrictions() {
    100         RestrictionsManager manager =
    101                 (RestrictionsManager) getActivity().getSystemService(Context.RESTRICTIONS_SERVICE);
    102         Bundle restrictions = manager.getApplicationRestrictions();
    103         List<RestrictionEntry> entries = manager.getManifestRestrictions(
    104                 getActivity().getApplicationContext().getPackageName());
    105         for (RestrictionEntry entry : entries) {
    106             String key = entry.getKey();
    107             Log.d(TAG, "key: " + key);
    108             if (key.equals(KEY_CAN_SAY_HELLO)) {
    109                 updateCanSayHello(entry, restrictions);
    110             } else if (key.equals(KEY_MESSAGE)) {
    111                 updateMessage(entry, restrictions);
    112             } else if (key.equals(KEY_NUMBER)) {
    113                 updateNumber(entry, restrictions);
    114             } else if (key.equals(KEY_RANK)) {
    115                 updateRank(entry, restrictions);
    116             } else if (key.equals(KEY_APPROVALS)) {
    117                 updateApprovals(entry, restrictions);
    118             } else if (key.equals(KEY_ITEMS)) {
    119                 updateItems(restrictions);
    120             }
    121         }
    122     }
    123 
    124     private void updateCanSayHello(RestrictionEntry entry, Bundle restrictions) {
    125         boolean canSayHello;
    126         if (restrictions == null || !restrictions.containsKey(KEY_CAN_SAY_HELLO)) {
    127             canSayHello = entry.getSelectedState();
    128         } else {
    129             canSayHello = restrictions.getBoolean(KEY_CAN_SAY_HELLO);
    130         }
    131         mTextSayHello.setText(canSayHello ?
    132                 R.string.explanation_can_say_hello_true :
    133                 R.string.explanation_can_say_hello_false);
    134         mButtonSayHello.setEnabled(canSayHello);
    135     }
    136 
    137     private void updateMessage(RestrictionEntry entry, Bundle restrictions) {
    138         if (restrictions == null || !restrictions.containsKey(KEY_MESSAGE)) {
    139             mMessage = entry.getSelectedString();
    140         } else {
    141             mMessage = restrictions.getString(KEY_MESSAGE);
    142         }
    143     }
    144 
    145     private void updateNumber(RestrictionEntry entry, Bundle restrictions) {
    146         int number;
    147         if (restrictions == null || !restrictions.containsKey(KEY_NUMBER)) {
    148             number = entry.getIntValue();
    149         } else {
    150             number = restrictions.getInt(KEY_NUMBER);
    151         }
    152         mTextNumber.setText(getString(R.string.your_number, number));
    153     }
    154 
    155     private void updateRank(RestrictionEntry entry, Bundle restrictions) {
    156         String rank;
    157         if (restrictions == null || !restrictions.containsKey(KEY_RANK)) {
    158             rank = entry.getSelectedString();
    159         } else {
    160             rank = restrictions.getString(KEY_RANK);
    161         }
    162         mTextRank.setText(getString(R.string.your_rank, rank));
    163     }
    164 
    165     private void updateApprovals(RestrictionEntry entry, Bundle restrictions) {
    166         String[] approvals;
    167         if (restrictions == null || !restrictions.containsKey(KEY_APPROVALS)) {
    168             approvals = entry.getAllSelectedStrings();
    169         } else {
    170             approvals = restrictions.getStringArray(KEY_APPROVALS);
    171         }
    172         String text;
    173         if (approvals == null || approvals.length == 0) {
    174             text = getString(R.string.none);
    175         } else {
    176             text = TextUtils.join(", ", approvals);
    177         }
    178         mTextApprovals.setText(getString(R.string.approvals_you_have, text));
    179     }
    180 
    181     private void updateItems(Bundle restrictions) {
    182         if (!BUNDLE_SUPPORTED) {
    183             return;
    184         }
    185         StringBuilder builder = new StringBuilder();
    186         if (restrictions != null) {
    187             Parcelable[] parcelables = restrictions.getParcelableArray(KEY_ITEMS);
    188             if (parcelables != null && parcelables.length > 0) {
    189                 Bundle[] items = new Bundle[parcelables.length];
    190                 for (int i = 0; i < parcelables.length; i++) {
    191                     items[i] = (Bundle) parcelables[i];
    192                 }
    193                 boolean first = true;
    194                 for (Bundle item : items) {
    195                     if (!item.containsKey(KEY_ITEM_KEY) || !item.containsKey(KEY_ITEM_VALUE)) {
    196                         continue;
    197                     }
    198                     if (first) {
    199                         first = false;
    200                     } else {
    201                         builder.append(", ");
    202                     }
    203                     builder.append(item.getString(KEY_ITEM_KEY));
    204                     builder.append(":");
    205                     builder.append(item.getString(KEY_ITEM_VALUE));
    206                 }
    207             } else {
    208                 builder.append(getString(R.string.none));
    209             }
    210         } else {
    211             builder.append(getString(R.string.none));
    212         }
    213         mTextItems.setText(getString(R.string.your_items, builder));
    214     }
    215 
    216     @Override
    217     public void onClick(View view) {
    218         switch (view.getId()) {
    219             case R.id.say_hello: {
    220                 Toast.makeText(getActivity(), getString(R.string.message, mMessage),
    221                         Toast.LENGTH_SHORT).show();
    222                 break;
    223             }
    224         }
    225     }
    226 
    227 }
    228