Android加载webview 弹出错误

      项目中需要加载本地的json数据放到webview上显示，之前加载url的数据，都是新建一个线程然后加载图形，不过突然出现如下错误：

07-30 10:15:44.031: W/webview_proxy(3770): java.lang.Throwable: Warning: A WebView method was called on thread 'WebViewCoreThread'. All WebView methods must be called on the UI thread. Future versions of WebView may not support use on other threads.

错误很明显是说webview的进程需要放到主线程里面来做，引入stack里的网页回答如下：

5down votefavorite

My Web view is not calling the javascript function it is returning warning like below. Can anybody suggest how to get rid of the below warning.

07-30 10:15:44.031: W/webview_proxy(3770): java.lang.Throwable: Warning: A WebView method was called on thread 'WebViewCoreThread'. All WebView methods must be called on the UI thread. Future versions of WebView may not support use on other threads.

Below is my function.

public boolean onLongClick(View v){    System.out.println("dfdsf");    // Tell the javascript to handle this if not in selection mode    //if(!this.isInSelectionMode()){        this.getSettings().setJavaScriptEnabled(true);        this.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);        this.getSettings().setPluginsEnabled(true);        this.loadUrl("javascript:android.selection.longTouch();");        mScrolling = true;        //this.setJavaScriptEnabled(true);    //}    // Don't let the webview handle it    return true;}

android methods webview

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edited Jul 30 '13 at 10:25

Chintan Rathod

12.2k74367

asked Jul 30 '13 at 10:19

user1048958

1561415

 

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5 Answers

activeoldestvotes

up vote6down voteaccepted

The warning is telling you everything. You are calling the webview methods directly. That means you are calling them on WebViewCoreThread. You have to call them on the UI Thread that means in the Activity which uses this webview.

Like:

WebView wv = (WebView)findViewById(id);wv.setJavaScriptEnabled(true);wv.setJavaScriptCanOpenWindowsAutomatically(true);wv.setPluginsEnabled(true);wv.loadUrl("javascript:android.selection.longTouch();");

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answered Jul 30 '13 at 10:26

ZeusNet

484514

 

 

Is it same thing in the problem that if I called any WebView methods in AsyncTask, then it will not work? – David Dimalanta Oct 3 '13 at 7:38

 

This is accepted answer and I cant see setJavaScriptEnabled() or other these methods for WebView instance. – seema Aug 20 '15 at 12:10

 

I guess you are on a newer version of Android. This post was published on Android 2.3.3 i think. I'm not sure at all. In the newer versions you have to use the following code:wv.getSettings().setJavaScriptEnabled(true). Hope this solves your problem – ZeusNet Aug 24 '15 at 8:47 

add a comment

up vote15down vote

As the warning says you are calling the webview methods in the WebViewCoreThread. Thus modify your code like this,

public boolean onLongClick(View v){    YourActivity.this.runOnUiThread(new Runnable() {        public void run() {            this.getSettings().setJavaScriptEnabled(true);            this.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);            this.getSettings().setPluginsEnabled(true);            this.loadUrl("javascript:android.selection.longTouch();");            mScrolling = true;        }    });}

我采用的第二个解决方式，runOnUiThread方法，我的代码如下：

// 加载历史数据到图形界面public void loadHisData(final int cycle, final String instname) {getProgressDialog().show();new Thread() {@Overridepublic void run() {try {hisDataList = TradeAPI.getInstance().queryHisData(StaticContext.CHART_INST,StaticContext.CHART_CYCLE_60MIN);if (hisDataList != null) {final String json = JSONUtil.getJSON4HistoryData(hisDataList);activity.runOnUiThread(new Runnable() {@Overridepublic void run() {first_chart_webview.loadUrl("javascript:resetMockTicks("+ json + ","+ hisDataList.size() + ",1,1)");}});}} finally {Runnable work = new Runnable() {@Overridepublic void run() {getProgressDialog().dismiss();}};getHandler().post(work);}}}.start();}

5down votefavorite

My Web view is not calling the javascript function it is returning warning like below. Can anybody suggest how to get rid of the below warning.

07-30 10:15:44.031: W/webview_proxy(3770): java.lang.Throwable: Warning: A WebView method was called on thread 'WebViewCoreThread'. All WebView methods must be called on the UI thread. Future versions of WebView may not support use on other threads.

Below is my function.

public boolean onLongClick(View v){    System.out.println("dfdsf");    // Tell the javascript to handle this if not in selection mode    //if(!this.isInSelectionMode()){        this.getSettings().setJavaScriptEnabled(true);        this.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);        this.getSettings().setPluginsEnabled(true);        this.loadUrl("javascript:android.selection.longTouch();");        mScrolling = true;        //this.setJavaScriptEnabled(true);    //}    // Don't let the webview handle it    return true;}

android methods webview

shareimprove this question

edited Jul 30 '13 at 10:25

Chintan Rathod

12.2k74367

asked Jul 30 '13 at 10:19

user1048958

1561415

 

add a comment

5 Answers

activeoldestvotes

up vote6down voteaccepted

The warning is telling you everything. You are calling the webview methods directly. That means you are calling them on WebViewCoreThread. You have to call them on the UI Thread that means in the Activity which uses this webview.

Like:

WebView wv = (WebView)findViewById(id);wv.setJavaScriptEnabled(true);wv.setJavaScriptCanOpenWindowsAutomatically(true);wv.setPluginsEnabled(true);wv.loadUrl("javascript:android.selection.longTouch();");

shareimprove this answer

answered Jul 30 '13 at 10:26

ZeusNet

484514

 

   

Is it same thing in the problem that if I called any WebView methods in AsyncTask, then it will not work? – David Dimalanta Oct 3 '13 at 7:38

   

This is accepted answer and I cant see setJavaScriptEnabled() or other these methods for WebView instance. – seema Aug 20 '15 at 12:10

   

I guess you are on a newer version of Android. This post was published on Android 2.3.3 i think. I'm not sure at all. In the newer versions you have to use the following code:wv.getSettings().setJavaScriptEnabled(true). Hope this solves your problem – ZeusNet Aug 24 '15 at 8:47 

add a comment

up vote15down vote

As the warning says you are calling the webview methods in the WebViewCoreThread. Thus modify your code like this,

public boolean onLongClick(View v){    YourActivity.this.runOnUiThread(new Runnable() {        public void run() {            this.getSettings().setJavaScriptEnabled(true);            this.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);            this.getSettings().setPluginsEnabled(true);            this.loadUrl("javascript:android.selection.longTouch();");            mScrolling = true;        }    });}