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      1 /**
      2  * Copyright (c) 2014, Google Inc.
      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 package com.android.mail.ui;
     17 
     18 import android.app.ActionBar;
     19 import android.app.Activity;
     20 import android.os.Bundle;
     21 import android.view.MenuItem;
     22 import android.webkit.WebView;
     23 
     24 import com.android.mail.R;
     25 import com.android.mail.utils.LogTag;
     26 import com.android.mail.utils.LogUtils;
     27 
     28 import org.apache.commons.io.IOUtils;
     29 
     30 import java.io.IOException;
     31 import java.io.InputStream;
     32 import java.net.URLEncoder;
     33 
     34 /**
     35  * This activity displays the Software Licenses of the libraries used by this software.
     36  */
     37 public class LicensesActivity extends Activity {
     38 
     39     @Override
     40     protected void onCreate(Bundle savedInstanceState) {
     41         super.onCreate(savedInstanceState);
     42 
     43         setContentView(R.layout.licenses_activity);
     44 
     45         // Enable back navigation
     46         final ActionBar actionBar = getActionBar();
     47         if (actionBar != null) {
     48             actionBar.setDisplayHomeAsUpEnabled(true);
     49         }
     50 
     51         InputStream input = null;
     52         String licenseHTML = null;
     53         try {
     54             // read the raw license String from the license HTML file
     55             input = getResources().openRawResource(R.raw.licenses);
     56             final String license = IOUtils.toString(input, "UTF-8");
     57 
     58             // encode the license string for display as HTML in the webview
     59             licenseHTML = URLEncoder.encode(license, "UTF-8").replace("+", "%20");
     60         } catch (IOException e) {
     61             LogUtils.e(LogTag.getLogTag(), e, "Error reading licence file");
     62         } finally {
     63             if (input != null) {
     64                 try {
     65                     input.close();
     66                 } catch (IOException ioe) {
     67                     // best attempt only
     68                 }
     69             }
     70         }
     71 
     72         // set the license HTML into the webview
     73         final WebView webview = (WebView) findViewById(R.id.webview);
     74         webview.loadData(licenseHTML, "text/html", null);
     75     }
     76 
     77     @Override
     78     public boolean onOptionsItemSelected(MenuItem item) {
     79         switch (item.getItemId()) {
     80             case android.R.id.home: {
     81                 finish();
     82                 return true;
     83             }
     84             default: return super.onOptionsItemSelected(item);
     85         }
     86     }
     87 }