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      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 
     17 package com.android.settings;
     18 
     19 import android.app.Activity;
     20 import android.content.ActivityNotFoundException;
     21 import android.content.Intent;
     22 import android.content.res.Resources;
     23 import android.net.Uri;
     24 import android.os.Bundle;
     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 "Manual" in the Settings app.
     34  */
     35 public 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