在android webView中造成这种情况的原因是什么？

问题描述：

我收到以下异常，无法进行调试。在android webView中造成这种情况的原因是什么？

请帮忙。
代码：

public class HybridActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     WebView webview=(WebView)findViewById(R.id.webkitWebView1); 
     WebSettings settings=webview.getSettings(); 
     settings.setJavaScriptEnabled(true); 
     settings.setDatabaseEnabled(true); 
     settings.setDomStorageEnabled(true); 
     settings.setAllowFileAccess(true); 
     settings.setBuiltInZoomControls(true); 
     webview.setWebChromeClient(new WebChromeClient()); 

     // webview.loadUrl("file:///android_asset/www/html/hyb.html"); 
     // webview.loadUrl("file:///android_asset/index.html"); 
     try { 
      webview.loadUrl("http://www.google.com"); 
     } catch (Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     MultipleWebViewHanlder webView2 = new MultipleWebViewHanlder(this); 
     webView2.loadNewWebView(); 
    } 
} 

public class MultipleWebViewHanlder { 
    public MultipleWebViewHanlder(Context context) { 
     // TODO Auto-generated constructor stub 
     this.context = context; 
    } 

    public void MultipleWebViewArea(final String command) { 

     final RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT); 
     try { 
      Log.i("","Inside tryyyyyyyyyyyyyyyyyyyyy"); 
      final WebView mWebView = new WebView(context); 

      WebSettings settings=mWebView.getSettings(); 
      settings.setJavaScriptEnabled(true); 
      settings.setDatabaseEnabled(true); 
      settings.setDomStorageEnabled(true); 
      settings.setAllowFileAccess(true); 
      settings.setBuiltInZoomControls(true); 
      mWebView.setWebChromeClient(new WebChromeClient()); 
      JSInterface.handler.post(new Runnable() { 

       @Override 
       public void run() { 
        try { 
         Log.i("","Inside tryyyyyyyyyyyyyyyyyyyy b4 add content viewwwwwwwwww"); 
         Runnable runnable = new Runnable() { 
          public void run() { 
           ((Activity)context).addContentView(mWebView,params); 
           Log.i("","Inside tryyyyyyyyyyyyyyyyyyyy after add content viewwwwwwwwww "); 
           mWebView.loadUrl(((Activity)context).getResources().getString(R.string.DemoURL)); 
          } 
         }; 
         ((Activity)context).runOnUiThread(runnable);

04-20 10:55:58.052: WARN/dalvikvm(9255): threadid=8: thread exiting with uncaught exception (group=0x400207d8) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255): FATAL EXCEPTION: WebViewCoreThread 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.view.ViewRoot.checkThread(ViewRoot.java:2812) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.view.ViewRoot.invalidateChild(ViewRoot.java:607) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:633) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.view.ViewGroup.invalidateChild(ViewGroup.java:2505) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.view.View.invalidate(View.java:5115) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.webkit.WebView.viewInvalidate(WebView.java:2565) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.webkit.WebView.invalidateContentRect(WebView.java:2584) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.webkit.WebView.access$6200(WebView.java:304) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.webkit.WebView$PrivateHandler.handleMessage(WebView.java:7860) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.os.Looper.loop(Looper.java:123) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:637) 
04-20 10:55:58.092: ERROR/AndroidRuntime(9255):  at java.lang.Thread.run(Thread.java:1096) 
04-20 10:55:58.102: WARN/ActivityManager(172): Force finishing activity com.Hy5/.activity.Hy5CanvasActivity

代码，请.....！ – 2012-04-20 05:32:04

“只有创建视图层次结构的原始线程才能触及其视图。” - 简单的答案是你想用另一个线程来操纵UI，但除非你发布代码，否则没有人能够帮助你正确地修复它。 – Squonk 2012-04-20 05:38:18

答

很难没有看到代码，地说，但似乎你想要的元素从它的外部改变的所有者线程（这可能会发生，因为你试图从其他线程更改UI元素）。

那么试试这个：有一个接受一个可运行的参数作为一个辅助功能runOnUiThread()：

Runnable runnable = new Runnable() { 
    public void run() { 
     // your code here 
    } 
} 

runOnUiThread(runnable);

在android webView中造成这种情况的原因是什么？

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