Use of WebView in Android development (full program included)

Source: Internet
Author: User

Original address: http://www.pocketdigi.com/20110216/176.html

WebView is a good thing, the equivalent of a mini browser, using the WebKit kernel, so the perfect support html,javascript,css and so on. Sometimes, we can completely put the UI and even data processing to WebView, with PHP and other service-side programs, so that Android development has become a web development, can save a lot of energy.
Here is a simple example of a webview, if you use all the functions to the server script processing, the program is very complete, you just write a good web page, the URL is filled, and then compiled, is a new software.
Program features: Open the page at the same time display a progressdialog, the page loading is hidden, click on the link on the page to display the ProgressDialog again, load the hidden, the return key can be returned to the previous page.
XML layout:

12345678910
 <?xml version="1.0" encoding="UTF-8"?>  <absolutelayout android:orientation="vertical" android:id="@+id/ Tab1 " android:layout_width=" Fill_parent " android:layout_height=" Fill_parent "  xmlns:android="http://schemas.android.com/apk/res/android">        <webview android:id="@+id/wv"  android:layout_width="Fill_parent"      android:layout_height="Fill_parent"      android:layout_x="0.0dip"      android:layout_y="0.0dip"      android:layout_weight="1.0" />     </AbsoluteLayout>

Java code:

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465 66676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109
 Package Com.pocketdigi.webview;Import android.app.Activity;Import Android.app.AlertDialog;Import Android.app.ProgressDialog;Import Android.content.DialogInterface;Import Android.os.Bundle;Import Android.os.Handler;Import Android.os.Message;Import android.view.KeyEvent;Import android.webkit.WebChromeClient;Import Android.webkit.WebView;Import android.webkit.WebViewClient; Public classMainextendsActivity{    /** Called when the activity is first created. * /WebView WV;ProgressDialog PD;Handler Handler;@Override Public voidOnCreate(Bundle savedinstancestate) {        Super.onCreate(Savedinstancestate);Setcontentview(R.Layout.Main);Init();//Execute initialization functionLoadurl(Wv"Http://www.pocketdigi.com");Handler=NewHandler(){         Public voidHandlemessage(Message msg)        {//Define a handler to handle the communication between the download thread and the UI          if (!Thread.CurrentThread().isinterrupted())          {            Switch (Msg. What)            {             Case 0:Pd.Show();//Show progress dialog box             Break;             Case 1:Pd.Hide();//Hide Progress dialog box, do not use dismiss (), cancel (), or call Show () again, the small circle of the displayed dialog will not move.              Break;            }          }          Super.Handlemessage(Msg);        }        };    }     Public voidInit(){//InitializeWv=(WebView)Findviewbyid(R.ID.WV);Wv.getsettings().setjavascriptenabled(true);//JS availableWv.Setscrollbarstyle(0);//scroll bar style, 0 is not to leave the scroll bar space, scroll bar overlay on the pageWv.setwebviewclient(NewWebviewclient(){                Public BooleanShouldoverrideurlloading(FinalWebView View,Final StringUrl) {Loadurl(View,url);//Loading Web pages                return true;               }//Rewrite click action, load with WebView});Wv.setwebchromeclient(NewWebchromeclient(){         Public voidOnprogresschanged(WebView View,intProgress){//Load progress changes and trigger             if(Progress== -){Handler.Sendemptymessage(1);//If all loads, hides the progress dialog box            }                   Super.onprogresschanged(View, Progress);               }           });Pd=NewProgressDialog(Main. This);Pd.Setprogressstyle(ProgressDialog.Style_spinner);Pd.Setmessage("Please wait while the data is loaded!" ");    }     Public BooleanOnKeyDown(intKeyCode,KeyEventEvent) {//Snap back key        if ((KeyCode== KeyEvent.Keycode_back) &&Wv.CanGoBack()) {Wv.GoBack();               return true;           }Else if(KeyCode== KeyEvent.Keycode_back){Confirmexit();//Press the return key, but cannot return, execute exit confirmation        return true;         }           return Super.OnKeyDown(KeyCode, Event);       }     Public voidConfirmexit(){//Exit ConfirmationAlertdialog.BuilderAd=NewAlertdialog.Builder(Main. This);Ad.Settitle("Exit");Ad.Setmessage("Do you want to quit the software?");Ad.Setpositivebutton("Yes",NewDialoginterface.Onclicklistener() {//Exit button@Override Public voidOnClick(Dialoginterface Dialog,intI) {//TODO auto-generated method stubMain. This.Finish();//Close activity}});Ad.Setnegativebutton("No",NewDialoginterface.Onclicklistener() {@Override Public voidOnClick(Dialoginterface Dialog,intI) {//Do not exit without performing any action}});Ad.Show();//Display dialog box    }     Public voidLoadurl(FinalWebView View,Final StringUrl){    New Thread(){         Public voidRun(){Handler.Sendemptymessage(0);View.Loadurl(Url);//Loading Web pages        }        }.Start();    }}

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.