Basic use of WEBVEIW

Today, that's easy to understand. WebView

It is broadly divided into two situations: 1 in fragment 2 in activity

1 WebView Client Click Fallback in fragment is a challenge

Workaround for fallback code:

The principle is very simple: is to listen to Fragment current event, but press the time, see is not the fallback key, WebView can fallback?

If you can, just go back!

Set WebView internal fallback jump: Webview.setonkeylistener (New Onkeylistener () {@Overridepublic Boolean onKey (View v, int keycode, KeyEvent event) {//TODO auto-generated method Stubif (event.getaction () = = Keyevent.action_down) {if (keycode = = Keyevent.keycode_back && Webview.cangoback ()) {webview.goback (); return true;}} return false;}});

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Package Com.cim.pd.ui.fragment;import Android.app.activity;import Android.os.bundle;import Android.support.annotation.nullable;import Android.support.v4.app.fragment;import Android.view.KeyEvent;import Android.view.layoutinflater;import Android.view.view;import Android.view.view.onclicklistener;import Android.view.view.onkeylistener;import Android.view.viewgroup;import Android.webkit.webview;import Android.widget.imageview;import Android.widget.progressbar;import Com.cim.pd.r;import com.cim.pd.ui.MainActivity; Import com.cim.pd.view.mywebviewclient;/** * menu bar: * Buy the Lexmark Tracker page * * @author Hades * @Time 2014-12-4 * */public class Buyde  Vicefragment extends Fragment {public static final String ARG = "Buydevicefragment";p rivate mainactivity mainactivity;/** * Purchase Equipment WebView * */private WebView webview;/** * progress bar * */private ProgressBar ProgressBar; @Overridepublic void Onattach (Ac Tivity activity) {Super.onattach (activity); mainactivity = (mainactivity) activity;} @Overridepublic void OnCreate (Bundle sAvedinstancestate) {//TODO auto-generated method Stubsuper.oncreate (savedinstancestate);} @Overridepublic View Oncreateview (layoutinflater inflater, @Nullable viewgroup container, @Nullable Bundle Savedinstancestate) {//TODO auto-generated method Stubview view = Inflater.inflate (R.layout.fragment_buy_device, container, false); Inittop (view); Initwebview (view); return view;} /** * Initialize the information at the top * * @author Hades * @Time 2014-12-4 * @param view */private void Inittop (view view) {ProgressBar = (Progres SBar) View.findviewbyid (R.id.buy_progressbar);p rogressbar.setvisibility (view.visible); ImageView Drawerview = ( ImageView) View.findviewbyid (r.id.drawer_menu);//Set Listener: Drawerview.setonclicklistener (New Onclicklistener () {@ overridepublic void OnClick (View v) {//TODO auto-generated method Stubmainactivity.toggle ();}});} /** * Initialize page information: * * @author Hades * @Time 2014-12-4 * @param view */private void Initwebview (view view) {WebView = (webView ) View.findviewbyid (R.id.buy_webview); Webview.getsettings (). SetjavasCriptenabled (TRUE); String url = "http://m.cim120.com/";//First step: Directly load URL webview.loadurl (URL);//Second step: Set up the page to jump in the current WebView! Mywebviewclient client = new Mywebviewclient (Mainactivity,progressbar); webview.setwebviewclient (client);//settings WebView internal fallback Jump: Webview.setonkeylistener (New Onkeylistener () {@Overridepublic Boolean onKey (View v, int keycode, KeyEvent event) {//TODO auto-generated method Stubif (event.getaction () = = Keyevent.action_down) {if (keycode = = Keyevent.keycode_back && Webview.cangoback ()) {webview.goback (); return true;}}}); @Overridepublic void Ondestroyview () {//TODO auto-generated method Stubsuper.ondestroyview ();}}

2 Activity

/** * Initialize Component *  * @Hades * @Dec 3, * @11:35:35 PM */private void init () {WebView = (WebView) This.findviewbyid (r.id . My_buy_webview); Webview.getsettings (). Setjavascriptenabled (True); String url = "http://m.cim120.com/";//The first way: Directly load webview.loadurl (URL);//second: Create your own  browser! Search the data of the friend in the inside display! Mywebviewclient client = new Mywebviewclient (Buydeviceactivity.this,progressbar); webview.setwebviewclient (client);} /** * Set webviewclient internal fallback */@Overridepublic void onbackpressed () {//TODO auto-generated method Stubif ( Webview.cangoback ()) {Webview.goback ();} Else{finish ();}}

There is a callback method inside the Activity that listens for the fallback key.

onbackpressed;

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WebView in Webview.getsettings (). Setjavascriptenabled (True);

This is added Js support, if there is no such sentence, it will lead to webView loading the page,
JS effects, can not be displayed!

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Some of the little ideas today:

When jumping to buydeviceactivity


When you click, how do you save the data?
Error:
12-04 13:51:19.778:e/crashhandler (19281): caused By:libcore.io.ErrnoException:write failed:enospc (No space left on de Vice


The reason is because: I was too careless! Not added in application register activity!

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Webviewclient is the data used to display the contents of the WebView;

If you do not have him, when you click Ah webview internal content, it will default to open a intent to call the local

Browser's app.

Therefore, the webviewclient must be customized, and shouldoverrideurlloading must be rewritten.

Package Com.example.webview;import Android.app.activity;import Android.content.context;import Android.util.attributeset;import Android.view.view;import Android.webkit.webview;import Android.webkit.webviewclient;import Android.widget.progressbar;public class Mywebviewclient extends WebViewClient { Private ProgressBar progressbar;public mywebviewclient () {//TODO auto-generated constructor Stub}public Mywebviewclient (Activity context) {//TODO auto-generated constructor Stubsuper ();} Public mywebviewclient (Activity Context,progressbar ProgressBar) {//TODO auto-generated constructor Stubsuper (); This.progressbar = ProgressBar;} @Overridepublic Boolean shouldoverrideurlloading (WebView view, String URL) {//TODO auto-generated method Stubview.loadurl (URL); return true;} /** * WebView Load Complete data * */@Overridepublic void onpagefinished (WebView view, String URL) {//TODO auto-generated method stub/ /super.onpagefinished (view, URL);p rogressbar.setvisibility (View.gone);}}

Onpagefinished () is called after the WebView has been successfully loaded,

Here you can set the progress bar to gone!

Let the progress bar disappear.

Basic use of WEBVEIW