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.os.SystemProperties;
26 import android.text.TextUtils;
27 import android.view.Gravity;
28 import android.view.View;
29 import android.widget.ImageView;
30 import android.widget.TextView;
31 
32 /**
33  * {@link Activity} that displays regulatory information for the "Regulatory information"
34  * preference item, and when "*#07#" is dialed on the Phone keypad. To enable this feature,
35  * set the "config_show_regulatory_info" boolean to true in a device overlay resource, and in the
36  * same overlay, either add a drawable named "regulatory_info.png" containing a graphical version
37  * of the required regulatory info (If ro.bootloader.hardware.sku property is set use
38  * "regulatory_info_<sku>.png where sku is ro.bootloader.hardware.sku property value in lowercase"),
39  * or add a string resource named "regulatory_info_text" with an HTML version of the required
40  * information (text will be centered in the dialog).
41  */
42 public class RegulatoryInfoDisplayActivity extends Activity implements
43         DialogInterface.OnDismissListener {
44     private final String REGULATORY_INFO_RESOURCE = "regulatory_info";
45 
46     /**
47      * Display the regulatory info graphic in a dialog window.
48      */
49     @Override
onCreate(Bundle savedInstanceState)50     protected void onCreate(Bundle savedInstanceState) {
51         super.onCreate(savedInstanceState);
52         Resources resources = getResources();
53 
54         if (!resources.getBoolean(R.bool.config_show_regulatory_info)) {
55             finish();   // no regulatory info to display for this device
56         }
57 
58         AlertDialog.Builder builder = new AlertDialog.Builder(this)
59                 .setTitle(R.string.regulatory_information)
60                 .setOnDismissListener(this);
61 
62         boolean regulatoryInfoDrawableExists = false;
63         int resId = getResourceId();
64         if (resId != 0) {
65             try {
66                 Drawable d = getDrawable(resId);
67                 // set to false if the width or height is <= 2
68                 // (missing PNG can return an empty 2x2 pixel Drawable)
69                 regulatoryInfoDrawableExists = (d.getIntrinsicWidth() > 2
70                         && d.getIntrinsicHeight() > 2);
71             } catch (Resources.NotFoundException ignored) {
72                 regulatoryInfoDrawableExists = false;
73             }
74         }
75 
76         CharSequence regulatoryText = resources.getText(R.string.regulatory_info_text);
77 
78         if (regulatoryInfoDrawableExists) {
79             View view = getLayoutInflater().inflate(R.layout.regulatory_info, null);
80             ImageView image = (ImageView) view.findViewById(R.id.regulatoryInfo);
81             image.setImageResource(resId);
82             builder.setView(view);
83             builder.show();
84         } else if (regulatoryText.length() > 0) {
85             builder.setMessage(regulatoryText);
86             AlertDialog dialog = builder.show();
87             // we have to show the dialog first, or the setGravity() call will throw a NPE
88             TextView messageText = (TextView) dialog.findViewById(android.R.id.message);
89             messageText.setGravity(Gravity.CENTER);
90         } else {
91             // neither drawable nor text resource exists, finish activity
92             finish();
93         }
94     }
95 
getResourceId()96     private int getResourceId() {
97         // Use regulatory_info by default.
98         int resId = getResources().getIdentifier(
99                 REGULATORY_INFO_RESOURCE, "drawable", getPackageName());
100 
101         // When hardware sku property exists, use regulatory_info_<sku> resource if valid.
102         String sku = SystemProperties.get("ro.boot.hardware.sku", "");
103         if (!TextUtils.isEmpty(sku)) {
104             String regulatory_info_res = REGULATORY_INFO_RESOURCE + "_" + sku.toLowerCase();
105             int id = getResources().getIdentifier(
106                     regulatory_info_res, "drawable", getPackageName());
107             if (id != 0) {
108                 resId = id;
109             }
110         }
111         return resId;
112     }
113 
114     @Override
onDismiss(DialogInterface dialog)115     public void onDismiss(DialogInterface dialog) {
116         finish();   // close the activity
117     }
118 }
119