Styjun

There is a WebViewPool,when Activity/Fragment is destoryed,webview will be reset and add to the WebViewPool.

The following is the code of WebViewPool:

public class WebViewPool 

 private static volatile WebViewPool sINSTANCE;
 private int mMaxSize;

 private List<WebView> mAvailableList;
 private List<WebView> mInUsedList;
 private IWebViewPoolFactory mFactory;

 private WebViewPool() 

 

 public static WebViewPool getInstance() 
 if (sINSTANCE == null) 
 synchronized (WebViewPool.class) 
 if (sINSTANCE == null) 
 sINSTANCE = new WebViewPool();
 
 
 
 return sINSTANCE;
 

 public void init(IWebViewPoolFactory factory,boolean lazy) 
 init(2, factory,lazy);
 

 public void init(int maxSize, IWebViewPoolFactory factory,boolean lazy) 
 mMaxSize = maxSize;
 mFactory = factory;
 mAvailableList = new ArrayList<>(maxSize);
 mInUsedList = new ArrayList<>(maxSize);
 if (!lazy) 
 create();
 
 


 private synchronized void create() 
 if (mFactory == null) 
 return;
 
 for (int i = 0; i < mMaxSize; i++) 
 WebView webView = mFactory.create(new MutableContextWrapper(APP.getApplicationContext()));
 mAvailableList.add(webView);
 
 

 /**
 * get webview form pool
 * @param context
 * @return
 */
 public synchronized WebView getWebView(Context context) 
 if(!(context instanceof Activity))
 throw new IllegalStateException("Context must be Activity");
 
 WebView webView = null;
 if (mAvailableList.size() > 0) 
 webView = mAvailableList.remove(0);

 else 
 if (mFactory != null) 
 webView = mFactory.create(new MutableContextWrapper(APP.getApplicationContext()));
 
 
 if (webView != null) 
 ((MutableContextWrapper) webView.getContext()).setBaseContext(context);
 mInUsedList.add(webView);
 
 return webView;
 

 /**
 * reset/destroy webview when activity/fragemnt is destroyed
 * @param webView
 */
 public synchronized void restWebView(WebView webView) 
 if (webView == null 

the following is some code of reset function:

 public void reset(WebView webView) 
 if(webView==null)
 return;
 
 ViewParent viewParent = webView.getParent();
 if (viewParent!=null) 
 ((ViewGroup)viewParent).removeView(webView);
 
 webView.stopLoading();
 webView.clearCache(false);
 webView.loadUrl("about:blank");
 new Handler(Looper.getMainLooper()).postDelayed(new Runnable() 
 @Override
 public void run() 
 webView.clearHistory();
 
 , 1000);
 

But when reuse the webview,last html page show first before new url sometimes.It doesn't happened everytime. I searched in Google, but not work.Does anyone know the reason? Thank you!