RegulatoryInfoDisplayActivity.java revision 5e9bd86bc6f89b1a743b04d69e793638ffb8cb41 
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
17package com.android.settings;
18
19import android.app.Activity;
20import android.app.AlertDialog;
21import android.content.DialogInterface;
22import android.content.res.Resources;
23import android.graphics.drawable.Drawable;
24import android.os.Bundle;
25import android.view.Gravity;
26import 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 */
36public 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