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      1 /*
      2  * Copyright (C) 2013 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.android.settings;
     18 
     19 import android.app.Activity;
     20 import android.app.AlertDialog;
     21 import android.content.DialogInterface;
     22 import android.content.res.Resources;
     23 import android.graphics.drawable.Drawable;
     24 import android.os.Bundle;
     25 import android.view.Gravity;
     26 import android.widget.TextView;
     27 
     28 /**
     29  * {@link Activity} that displays regulatory information for the "Regulatory information"
     30  * preference item, and when "*#07#" is dialed on the Phone keypad. To enable this feature,
     31  * set the "config_show_regulatory_info" boolean to true in a device overlay resource, and in the
     32  * same overlay, either add a drawable named "regulatory_info.png" containing a graphical version
     33  * of the required regulatory info, or add a string resource named "regulatory_info_text" with
     34  * an HTML version of the required information (text will be centered in the dialog).
     35  */
     36 public class RegulatoryInfoDisplayActivity extends Activity implements
     37         DialogInterface.OnDismissListener {
     38 
     39     /**
     40      * Display the regulatory info graphic in a dialog window.
     41      */
     42     @Override
     43     protected void onCreate(Bundle savedInstanceState) {
     44         super.onCreate(savedInstanceState);
     45         Resources resources = getResources();
     46 
     47         if (!resources.getBoolean(R.bool.config_show_regulatory_info)) {
     48             finish();   // no regulatory info to display for this device
     49         }
     50 
     51         AlertDialog.Builder builder = new AlertDialog.Builder(this)
     52                 .setTitle(R.string.regulatory_information)
     53                 .setOnDismissListener(this);
     54 
     55         boolean regulatoryInfoDrawableExists;
     56         try {
     57             Drawable d = resources.getDrawable(R.drawable.regulatory_info);
     58             // set to false if the width or height is <= 2
     59             // (missing PNG can return an empty 2x2 pixel Drawable)
     60             regulatoryInfoDrawableExists = (d.getIntrinsicWidth() > 2
     61                     && d.getIntrinsicHeight() > 2);
     62         } catch (Resources.NotFoundException ignored) {
     63             regulatoryInfoDrawableExists = false;
     64         }
     65 
     66         CharSequence regulatoryText = resources.getText(R.string.regulatory_info_text);
     67 
     68         if (regulatoryInfoDrawableExists) {
     69             builder.setView(getLayoutInflater().inflate(R.layout.regulatory_info, null));
     70             builder.show();
     71         } else if (regulatoryText.length() > 0) {
     72             builder.setMessage(regulatoryText);
     73             AlertDialog dialog = builder.show();
     74             // we have to show the dialog first, or the setGravity() call will throw a NPE
     75             TextView messageText = (TextView) dialog.findViewById(android.R.id.message);
     76             messageText.setGravity(Gravity.CENTER);
     77         } else {
     78             // neither drawable nor text resource exists, finish activity
     79             finish();
     80         }
     81     }
     82 
     83     @Override
     84     public void onDismiss(DialogInterface dialog) {
     85         finish();   // close the activity
     86     }
     87 }
     88