1/*
2 * Copyright (C) 2015 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.content.ActivityNotFoundException;
21import android.content.Intent;
22import android.content.res.Resources;
23import android.net.Uri;
24import android.os.Bundle;
25import android.os.SystemProperties;
26import android.text.TextUtils;
27import android.util.Log;
28import android.widget.Toast;
29
30import java.io.File;
31
32/**
33 * The "dialog" that shows from "Manual" in the Settings app.
34 */
35public class ManualDisplayActivity extends Activity {
36    private static final String TAG = "SettingsManualActivity";
37
38    private static final String DEFAULT_MANUAL_PATH = "/system/etc/MANUAL.html.gz";
39    private static final String PROPERTY_MANUAL_PATH = "ro.config.manual_path";
40
41    @Override
42    protected void onCreate(Bundle savedInstanceState) {
43        super.onCreate(savedInstanceState);
44        Resources resources = getResources();
45
46        if (!resources.getBoolean(R.bool.config_show_manual)) {
47            finish();   // No manual to display for this device
48        }
49
50        final String path = SystemProperties.get(PROPERTY_MANUAL_PATH, DEFAULT_MANUAL_PATH);
51        if (TextUtils.isEmpty(path)) {
52            Log.e(TAG, "The system property for the manual is empty");
53            showErrorAndFinish();
54            return;
55        }
56
57        final File file = new File(path);
58        if (!file.exists() || file.length() == 0) {
59            Log.e(TAG, "Manual file " + path + " does not exist");
60            showErrorAndFinish();
61            return;
62        }
63
64        final Intent intent = new Intent(Intent.ACTION_VIEW);
65        intent.setDataAndType(Uri.fromFile(file), "text/html");
66
67        intent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_manual_activity_title));
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.settings_manual_activity_unavailable, Toast.LENGTH_LONG)
82                .show();
83        finish();
84    }
85}
86