Android WebView Javascript通信錯誤

Question

我的WebView應用程序出現問題。我將通過Javascript啓動WebView和App之間的通信。 的錯誤：

E/Web Console﹕ Uncaught Error: Error calling method on NPObject.

的JavascriptInterfaces：

public class MainActivity extends Activity { 
    public class WebAppInterface { 
     Context mContext; 
     WebAppInterface(Context c) { 
      mContext = c; 
     } 
     @JavascriptInterface 
     public void launch(String name) { 
      Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage(name); 
      startActivity(LaunchIntent); 
     } 
     @JavascriptInterface 
     public void test() { 
      WebView myWebView = (WebView) findViewById(R.id.webview); 
      myWebView.loadUrl("javascript: alert('test');"); 
     } 
    } 

web視圖設置：

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     WebView myWebView = (WebView) findViewById(R.id.webview); 
     WebSettings webSettings = myWebView.getSettings(); 
     myWebView.getSettings().setJavaScriptEnabled(true); 
     myWebView.setInitialScale(100); 
     myWebView.setWebChromeClient(new WebChromeClient()); 
     myWebView.setWebViewClient(new WebViewClient()); 
     myWebView.addJavascriptInterface(new WebAppInterface(this), "Android"); 
     myWebView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH); 
     myWebView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE); 
     myWebView.requestFocus(View.FOCUS_DOWN); 
     myWebView.loadUrl("file:///android_asset/index.html"); 
    } 

任何人誰可以幫助嗎？

Answer 1

您是否嘗試在UI線程的WebAppInterface.launch（）和WebAppInterface.test（）中運行代碼：link