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      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 
     17 package com.android.tv.settings.about;
     18 
     19 import com.android.tv.settings.R;
     20 
     21 import android.app.Activity;
     22 import android.content.ActivityNotFoundException;
     23 import android.content.Intent;
     24 import android.net.Uri;
     25 import android.os.Bundle;
     26 import android.os.SystemProperties;
     27 import android.text.TextUtils;
     28 import android.util.Log;
     29 import android.widget.Toast;
     30 
     31 import java.io.File;
     32 
     33 
     34 /**
     35  * Displays open source NOTICE files.
     36  */
     37 public 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