1 /*
2  * Copyright (C) 2007 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.content.ActivityNotFoundException;
21 import android.content.Intent;
22 import android.net.Uri;
23 import android.os.Bundle;
24 import android.os.StrictMode;
25 import android.os.SystemProperties;
26 import android.text.TextUtils;
27 import android.util.Log;
28 import android.widget.Toast;
29 
30 import java.io.File;
31 
32 /**
33  * The "dialog" that shows from "License" in the Settings app.
34  */
35 public class SettingsLicenseActivity extends Activity {
36     private static final String TAG = "SettingsLicenseActivity";
37 
38     private static final String DEFAULT_LICENSE_PATH = "/system/etc/NOTICE.html.gz";
39     private static final String PROPERTY_LICENSE_PATH = "ro.config.license_path";
40 
41     @Override
onCreate(Bundle savedInstanceState)42     protected void onCreate(Bundle savedInstanceState) {
43         super.onCreate(savedInstanceState);
44 
45         final String path = SystemProperties.get(PROPERTY_LICENSE_PATH, DEFAULT_LICENSE_PATH);
46         if (TextUtils.isEmpty(path)) {
47             Log.e(TAG, "The system property for the license file is empty");
48             showErrorAndFinish();
49             return;
50         }
51 
52         final File file = new File(path);
53         if (!file.exists() || file.length() == 0) {
54             Log.e(TAG, "License file " + path + " does not exist");
55             showErrorAndFinish();
56             return;
57         }
58 
59         // Kick off external viewer due to WebView security restrictions; we
60         // carefully point it at HTMLViewer, since it offers to decompress
61         // before viewing.
62         final Intent intent = new Intent(Intent.ACTION_VIEW);
63         intent.setDataAndType(Uri.fromFile(file), "text/html");
64         intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_license_activity_title));
65         intent.addCategory(Intent.CATEGORY_DEFAULT);
66         intent.setPackage("com.android.htmlviewer");
67 
68         try {
69             startActivity(intent);
70             finish();
71         } catch (ActivityNotFoundException e) {
72             Log.e(TAG, "Failed to find viewer", e);
73             showErrorAndFinish();
74         }
75     }
76 
showErrorAndFinish()77     private void showErrorAndFinish() {
78         Toast.makeText(this, R.string.settings_license_activity_unavailable, Toast.LENGTH_LONG)
79                 .show();
80         finish();
81     }
82 }
83