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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.RestrictionsManager;
     21 import android.os.Bundle;
     22 import android.support.annotation.Nullable;
     23 import android.support.v4.app.Fragment;
     24 import android.view.LayoutInflater;
     25 import android.view.View;
     26 import android.view.ViewGroup;
     27 import android.widget.Button;
     28 import android.widget.TextView;
     29 import android.widget.Toast;
     30 
     31 import com.example.android.common.logger.Log;
     32 
     33 /**
     34  * Pressing the button on this fragment pops up a simple Toast message. The button is enabled or
     35  * disabled according to the restrictions set by device/profile owner. You can use the
     36  * AppRestrictionEnforcer sample as a profile owner for this.
     37  */
     38 public class AppRestrictionSchemaFragment extends Fragment implements View.OnClickListener {
     39 
     40     // Tag for the logger
     41     private static final String TAG = "AppRestrictionSchemaFragment";
     42 
     43     // UI Components
     44     private TextView mTextSayHello;
     45     private Button mButtonSayHello;
     46 
     47     @Override
     48     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
     49                              @Nullable Bundle savedInstanceState) {
     50         return inflater.inflate(R.layout.fragment_app_restriction_schema, container, false);
     51     }
     52 
     53     @Override
     54     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
     55         mTextSayHello = (TextView) view.findViewById(R.id.say_hello_explanation);
     56         mButtonSayHello = (Button) view.findViewById(R.id.say_hello);
     57         mButtonSayHello.setOnClickListener(this);
     58     }
     59 
     60     @Override
     61     public void onResume() {
     62         super.onResume();
     63         // Update the UI according to the configured restrictions
     64         RestrictionsManager restrictionsManager =
     65                 (RestrictionsManager) getActivity().getSystemService(Context.RESTRICTIONS_SERVICE);
     66         Bundle restrictions = restrictionsManager.getApplicationRestrictions();
     67         updateUI(restrictions);
     68     }
     69 
     70     private void updateUI(Bundle restrictions) {
     71         if (canSayHello(restrictions)) {
     72             mTextSayHello.setText(R.string.explanation_can_say_hello_true);
     73             mButtonSayHello.setEnabled(true);
     74         } else {
     75             mTextSayHello.setText(R.string.explanation_can_say_hello_false);
     76             mButtonSayHello.setEnabled(false);
     77         }
     78     }
     79 
     80     /**
     81      * Returns the current status of the restriction.
     82      *
     83      * @param restrictions The application restrictions
     84      * @return True if the app is allowed to say hello
     85      */
     86     private boolean canSayHello(Bundle restrictions) {
     87         final boolean defaultValue = false;
     88         boolean canSayHello = restrictions == null ? defaultValue :
     89                 restrictions.getBoolean("can_say_hello", defaultValue);
     90         Log.d(TAG, "canSayHello: " + canSayHello);
     91         return canSayHello;
     92     }
     93 
     94     @Override
     95     public void onClick(View view) {
     96         switch (view.getId()) {
     97             case R.id.say_hello: {
     98                 Toast.makeText(getActivity(), R.string.message_hello, Toast.LENGTH_SHORT).show();
     99                 break;
    100             }
    101         }
    102     }
    103 
    104 }
    105