在android webView中造成這種情況的原因是什麼？

Question

我收到以下異常，無法進行調試。

請幫忙。
代碼：

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); 

登錄：

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 

Answer 1

很難沒有看到代碼， 地說，但似乎你想要的元素從它的外部改變的所有者線程（這可能會發生，因爲你試圖從其他線程更改UI元素）。

那麼試試這個：有一個接受一個可運行的參數作爲一個輔助功能runOnUiThread()：

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

runOnUiThread(runnable);