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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.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
     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 = resources.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 
     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
    115     public void onDismiss(DialogInterface dialog) {
    116         finish();   // close the activity
    117     }
    118 }
    119