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      1 /*
      2  * Copyright (C) 2010 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 android.webkit;
     18 
     19 import android.app.Fragment;
     20 import android.os.Bundle;
     21 import android.view.LayoutInflater;
     22 import android.view.View;
     23 import android.view.ViewGroup;
     24 import android.webkit.WebView;
     25 
     26 /**
     27  * A fragment that displays a WebView.
     28  * <p>
     29  * The WebView is automically paused or resumed when the Fragment is paused or resumed.
     30  */
     31 public class WebViewFragment extends Fragment {
     32     private WebView mWebView;
     33     private boolean mIsWebViewAvailable;
     34 
     35     public WebViewFragment() {
     36     }
     37 
     38     /**
     39      * Called to instantiate the view. Creates and returns the WebView.
     40      */
     41     @Override
     42     public View onCreateView(LayoutInflater inflater, ViewGroup container,
     43             Bundle savedInstanceState) {
     44         if (mWebView != null) {
     45             mWebView.destroy();
     46         }
     47         mWebView = new WebView(getContext());
     48         mIsWebViewAvailable = true;
     49         return mWebView;
     50     }
     51 
     52     /**
     53      * Called when the fragment is visible to the user and actively running. Resumes the WebView.
     54      */
     55     @Override
     56     public void onPause() {
     57         super.onPause();
     58         mWebView.onPause();
     59     }
     60 
     61     /**
     62      * Called when the fragment is no longer resumed. Pauses the WebView.
     63      */
     64     @Override
     65     public void onResume() {
     66         mWebView.onResume();
     67         super.onResume();
     68     }
     69 
     70     /**
     71      * Called when the WebView has been detached from the fragment.
     72      * The WebView is no longer available after this time.
     73      */
     74     @Override
     75     public void onDestroyView() {
     76         mIsWebViewAvailable = false;
     77         super.onDestroyView();
     78     }
     79 
     80     /**
     81      * Called when the fragment is no longer in use. Destroys the internal state of the WebView.
     82      */
     83     @Override
     84     public void onDestroy() {
     85         if (mWebView != null) {
     86             mWebView.destroy();
     87             mWebView = null;
     88         }
     89         super.onDestroy();
     90     }
     91 
     92     /**
     93      * Gets the WebView.
     94      */
     95     public WebView getWebView() {
     96         return mIsWebViewAvailable ? mWebView : null;
     97     }
     98 }
     99