1/*
2 * Copyright (C) 2014 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.tv.settings.about;
18
19import com.android.tv.settings.R;
20
21import android.app.Activity;
22import android.content.ActivityNotFoundException;
23import android.content.Intent;
24import android.net.Uri;
25import android.os.Bundle;
26import android.os.SystemProperties;
27import android.text.TextUtils;
28import android.util.Log;
29import android.widget.Toast;
30
31import java.io.File;
32
33
34/**
35 * Displays open source NOTICE files.
36 */
37public class LicenseActivity extends Activity {
38
39    private static final String TAG = "LicenseActivity";
40
41    private static final String DEFAULT_LICENSE_PATH = "/system/etc/NOTICE.html.gz";
42    private static final String PROPERTY_LICENSE_PATH = "ro.config.license_path";
43
44    @Override
45    protected void onCreate(Bundle savedInstanceState) {
46        super.onCreate(savedInstanceState);
47
48        final String path = SystemProperties.get(PROPERTY_LICENSE_PATH, DEFAULT_LICENSE_PATH);
49        if (TextUtils.isEmpty(path)) {
50            Log.e(TAG, "The system property for the license file is empty");
51            showErrorAndFinish();
52            return;
53        }
54
55        final File file = new File(path);
56        if (!file.exists() || file.length() == 0) {
57            Log.e(TAG, "License file " + path + " does not exist");
58            showErrorAndFinish();
59            return;
60        }
61
62        // Kick off external viewer due to WebView security restrictions; we
63        // carefully point it at HTMLViewer, since it offers to decompress
64        // before viewing.
65        final Intent intent = new Intent(Intent.ACTION_VIEW);
66        intent.setDataAndType(Uri.fromFile(file), "text/html");
67        intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.about_legal_license));
68        intent.addCategory(Intent.CATEGORY_DEFAULT);
69        intent.setPackage("com.android.htmlviewer");
70
71        try {
72            startActivity(intent);
73            finish();
74        } catch (ActivityNotFoundException e) {
75            Log.e(TAG, "Failed to find viewer", e);
76            showErrorAndFinish();
77        }
78    }
79
80    private void showErrorAndFinish() {
81        Toast.makeText(this, R.string.about_license_activity_unavailable, Toast.LENGTH_LONG)
82                .show();
83        finish();
84    }
85}
86