Customize the WebView with a progress bar and add the webviewweb header and url retrieval function.

Customize the WebView with a progress bar and add the webviewweb header and url retrieval function.

1. Custom ProgressWebView

Package com. app. android05; import android. content. context; import android. graphics. bitmap; import android. util. attributeSet; import android. webkit. webView; import android. webkit. webViewClient; import android. widget. progressBar;/*** @ author admin * WebView with progress bar */public class ProgressWebView extends WebView {private Context context Context; private ProgressBar progressbar; private OnWebCallBack onWebCallBack; // Callback public ProgressWebView (Context context) {this (context, null);} public ProgressWebView (Context context, AttributeSet attrs) {this (context, attrs, android. r. attr. webTextViewStyle);} public ProgressWebView (Context context, AttributeSet attrs, int defStyle) {super (context, attrs, defStyle); this. context = context; init (); setWebViewClient (new MyWebViewClient (); setWebCh RomeClient (new WebChromeClient ();}/*** set ProgressBar */void init () {progressbar = new ProgressBar (context, null, android. r. attr. progressBarStyleHorizontal); progressbar. setLayoutParams (new LayoutParams (LayoutParams. MATCH_PARENT, 20, 0, 0); addView (progressbar);} public class WebChromeClient extends android. webkit. webChromeClient {@ Override public void onProgressChanged (WebView View, int newProgress) {if (newProgress = 100) {progressbar. setVisibility (GONE);} else {progressbar. setVisibility (VISIBLE); progressbar. setProgress (newProgress);} super. onProgressChanged (view, newProgress) ;}@ Override public void onReceivedTitle (WebView view, String title) {super. onwebedtitle (view, title); if (onWebCallBack! = Null) {// obtain the title onWebCallBack. getTitle (title) ;}}/ *** if not overwritten, will jump to the mobile browser * @ author admin */public class MyWebViewClient extends WebViewClient {@ Override public void onReceivedError (WebView view, int errorCode, String description, String failingUrl) {// Handle the goBack () ;}@ Override public boolean shouldOverrideUrlLoading (WebView view, String url) {view. loadUrl (url); return true;} @ Ov Erride public void onPageFinished (WebView view, String url) {super. onPageFinished (view, url) ;}@ Override public void onPageStarted (WebView view, String url, Bitmap favicon) {if (onWebCallBack! = Null) {// obtain the WebView address onWebCallBack. getUrl (url) ;}}@ Override protected void onScrollChanged (int l, int t, int oldl, int oldt) {LayoutParams lp = (LayoutParams) progressbar. getLayoutParams (); lp. x = l; lp. y = t; progressbar. setLayoutParams (lp); super. onScrollChanged (l, t, oldl, oldt);}/*** sets the WebView logoff * @ param onWebCallBack */void setOnWebCallBack (OnWebCallBack onWebCallBack) {this. onWebCallBack = onWebCallBack;} interface OnWebCallBack {/*** obtain the title * @ param title */void getTitle (String title ); /*** obtain the WebView address * @ param url */void getUrl (String url );}

 

2. xml reference

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.app.android05.MainActivity$PlaceholderFragment" >    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="title" />        <TextView        android:id="@+id/url"        android:layout_below="@id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="url" />    <com.app.android05.ProgressWebView        android:id="@+id/web"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_below="@id/url" /></RelativeLayout>

3. MainActivity call

Package com. app. android05; import android. app. activity; import android. OS. bundle; import android. widget. textView; public class MainActivity extends Activity {private TextView title_ TV; private TextView url_ TV; private ProgressWebView webView; private String url = "http://dict.youdao.com/"; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); title_ TV = (TextView) findViewById (R. id. TV); url_ TV = (TextView) findViewById (R. id. url); webView = (ProgressWebView) findViewById (R. id. web); // sets the webview return function to obtain the Url webView. setOnWebCallBack (new OnWebCallBack () {// obtain the title @ Override public void getTitle (String title) {title_ TV .setText (title );} // obtain the current web URL @ Override public void getUrl (String url) {url_ TV .setText (url) ;}}); webView. loadUrl (url );}}