javascript - WebView methods on same thread error -


i have android program (java + html in webview). can call javascript java code. other way around stopped working (after updating in eclipse).

so i'm trying do

  • make webview (worked)
  • calling in javascript androidfunction.test(); (worked)
  • the java test() function call webview.loadurl("javascript:helloback()"); (! not working anymore)

i tried let work webview in mainactivity, didnt work.

mainactivity.java

public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);         final webview webview = (webview)findviewbyid(r.id.webview);         webview.getsettings().setjavascriptenabled(true);         webview.setwebchromeclient(new webchromeclient());         websettings websettings = webview.getsettings();         websettings.setjavascriptenabled(true);          javascr = new javascript(this, webview);         webview.addjavascriptinterface(javascr, "androidfunction");         webview.loadurl("file:///android_asset/www/index.html");          .... }

javascript.java

public class javascript {        context cont;     webview webview;      javascript(context c, webview w) {         cont = c;         webview = w;     }      // function called in javascript androidfunction.test();     public void test() {           // breaking point!!!         webview.loadurl("javascript:helloback()");     }

error:

03-24 11:47:50.103: w/webview(21026):   @ com.android.org.chromium.base.systemmessagehandler.handlemessage(systemmessagehandler.java:27) 03-24 11:47:50.103: w/webview(21026):   java.lang.throwable: webview method called on thread 'javabridge'. webview methods must called on same thread. (expected looper looper{41ab68f8} called on looper{41bb70a8}, fyi main looper looper{41ab68f8})  03-24 11:47:50.103: w/webview(21026):   @ android.webkit.webview.checkthread(webview.java:2063) 03-24 11:47:50.103: w/webview(21026):   @ android.webkit.webview.loadurl(webview.java:794) 03-24 11:47:50.103: w/webview(21026):   @ com.example.hellobt.javascript.test(javascript.java:24)  03-24 11:47:50.103: w/webview(21026):   @ com.android.org.chromium.base.systemmessagehandler.nativedorunlooponce(native method) 03-24 11:47:50.103: w/webview(21026):   @ com.android.org.chromium.base.systemmessagehandler.handlemessage(systemmessagehandler.java:27) 03-24 11:47:50.103: w/webview(21026):   @ android.os.handler.dispatchmessage(handler.java:102)  03-24 11:47:50.103: w/webview(21026):   @ android.os.looper.loop(looper.java:137) 03-24 11:47:50.103: w/webview(21026):   @ android.os.handlerthread.run(handlerthread.java:61)

thanks answer. edited function in javascript file this:

private void test(final string s) {         webview.post(new runnable() {             public void run() {                 webview.loadurl("javascript:" + s + ";");             }         });         system.out.println("javscript done..");     }

the javascript method executed on background (i.e. non-ui) thread. need call android view related methods on ui thread. can achieve need with:

mwebview.post(new runnable() {     @override     public void run() {         mwebview.loadurl(...).     } });

which post task run on ui thread.


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