Проблема WebView на Android

Question

Я использую ниже код, чтобы прочитать .html-файл с WebView,
и открыть гиперссылку с другим браузере.

webView = (WebView)findViewById(R.id.terms_of_services_webview); 
String Path = "..."; //html file path 
WebSettings websettings = webView.getSettings(); 
websettings.setSupportZoom(true); 
websettings.setBuiltInZoomControls(true); 
websettings.setJavaScriptEnabled(true); 
webView.setWebViewClient(new WebViewClient() { 
    @Override 
    public boolean shouldOverrideUrlLoading(WebView view, String url) { 
     if(url.equals(Path)) { 
      view.loadUrl(url); 
     } 
     else { 
      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); 
      TermsOfServicesActivity.this.startActivity(intent); 
     } 
     return true; 
    } 
}); 

webView.loadUrl(Path); 

Код все в onCreate.

Но я нахожу раздувом код на Galaxy Tab 8.9 (Android 4.0.4):

11-20 16:24:49.613: W/webview(25896): 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. 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebView.checkThread(WebView.java:14240) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebView.getSettings(WebView.java:5374) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebView.getVisibleTitleHeightImpl(WebView.java:2340) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebView.getViewHeight(WebView.java:2382) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebViewCore.setupViewport(WebViewCore.java:3421) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebViewCore.didFirstLayout(WebViewCore.java:3148) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.JWebCoreJavaBridge.nativeServiceFuncPtrQueue(Native Method) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.JWebCoreJavaBridge.handleMessage(JWebCoreJavaBridge.java:113) 
11-20 16:24:49.613: W/webview(25896): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-20 16:24:49.613: W/webview(25896): at android.os.Looper.loop(Looper.java:137) 
11-20 16:24:49.613: W/webview(25896): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:828) 
11-20 16:24:49.613: W/webview(25896): at java.lang.Thread.run(Thread.java:856) 
11-20 16:24:49.623: E/StrictMode(25896): null 
11-20 16:24:49.623: E/StrictMode(25896): java.lang.Throwable: Warning: A WebView method was called on thread 'WebViewCoreThread'. All WebView methods must be called on the UI thread. Future versions of WebView may not support use on other threads. 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebView.checkThread(WebView.java:14240) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebView.getSettings(WebView.java:5374) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebView.getVisibleTitleHeightImpl(WebView.java:2340) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebView.getViewHeight(WebView.java:2382) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebViewCore.setupViewport(WebViewCore.java:3421) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebViewCore.didFirstLayout(WebViewCore.java:3148) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.JWebCoreJavaBridge.nativeServiceFuncPtrQueue(Native Method) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.JWebCoreJavaBridge.handleMessage(JWebCoreJavaBridge.java:113) 
11-20 16:24:49.623: E/StrictMode(25896): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-20 16:24:49.623: E/StrictMode(25896): at android.os.Looper.loop(Looper.java:137) 
11-20 16:24:49.623: E/StrictMode(25896): at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:828) 
11-20 16:24:49.623: E/StrictMode(25896): at java.lang.Thread.run(Thread.java:856) 

Но он работает на Xperia Z11 (Android 4.2.2), Nexus 7 (2013 Android 4.3. 1), ASUS TF201 (Android 4.1.1).

Почему это не работает на 4.0.3?
Как я могу избежать этого?

Answer 1

Как предупреждает, вы вызываете методы веб-просмотра в WebViewCoreThread. Таким образом изменить код, как это,

YourActivity.this.runOnUiThread(new Runnable() { 
    public void run() { 
     websettings.setSupportZoom(true); 
     websettings.setBuiltInZoomControls(true); 
     websettings.setJavaScriptEnabled(true); 
    webView.setWebViewClient(new WebViewClient() { 
    @Override 
    public boolean shouldOverrideUrlLoading(WebView view, String url) { 
    if(url.equals(Path)) { 
     view.loadUrl(url); 
    } 
    else { 
     Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); 
     TermsOfServicesActivity.this.startActivity(intent); 
    } 
    return true; 
    } 
}); 

    webView.loadUrl(Path); 
    } 
}); 

ИЛИ

Попробуйте написать ниже строку в onCreate() метода перед setContentView().

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); 
    StrictMode.setThreadPolicy(policy); 

Answer 2

Вам необходимо использовать WebView в потоке пользовательского интерфейса. Для этого вы можете использовать Runnable:

webView = (WebView)findViewById(R.id.terms_of_services_webview); 
webView.post(new Runnable() 
{ 
    @Override 
    public void run() 
    { 
     String Path = "..."; //html file path 
     WebSettings websettings = webView.getSettings(); 
     websettings.setSupportZoom(true); 
     websettings.setBuiltInZoomControls(true); 
     websettings.setJavaScriptEnabled(true); 

     webView.setWebViewClient(new WebViewClient() { 

     @Override 
     public boolean shouldOverrideUrlLoading(WebView view, String url) { 
     if(url.equals(Path)) { 
      view.loadUrl(url); 
     } 
     else { 
      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); 
      TermsOfServicesActivity.this.startActivity(intent); 
     } 
     return true; 
     } 
     }); 

     webView.loadUrl(Path); 
    } 
});