JavaScriptInterface不叫

爲什麼我的代碼不會觸發我的JavaScriptInterface：當webview加載時，我看不到任何對話框彈出窗口（我猜android.widget.Toast應該這樣做）。JavaScriptInterface不叫

package com.example; 

import android.app.Activity; 
import android.os.Bundle; 
import android.webkit.WebView; 

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

     String data = "<html>" + 
       "<body><h1>Test JavaScriptInterface</h1></body>" + 
       "<script>Android.showToast(toast);</script>" + 
       "</html>"; 

     WebView engine = (WebView) findViewById(R.id.web_engine); 
     engine.getSettings().setJavaScriptEnabled(true); 
     engine.addJavascriptInterface(new JavaScriptInterface(this), "Android"); 
     engine.loadData(data, "text/html", "UTF-8"); 

    } 
}

package com.example;

import android.content.Context; 
import android.widget.Toast; 

public class JavaScriptInterface { 

    Context mContext; 

    /** Instantiate the interface and set the context */ 
    JavaScriptInterface(Context c) { 
     mContext = c; 
    } 

    /** Show a toast from the web page */ 
    public void showToast(String toast) { 
     Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show(); 
    } 

}

來源

2012-02-06 user310291

只是一個猜測，但值得一試，因爲我沒有看到其他任何明顯錯誤。更改此：

String data = "<html>" + 
      "<body><h1>Test JavaScriptInterface</h1></body>" + 
      "<script>Android.showToast(toast);</script>" + 
      "</html>";

這樣：

String data = "<html>" + 
      "<body><h1>Test JavaScriptInterface</h1></body>" + 
      "<script>Android.showToast('toast');</script>" + 
      "</html>";

來源

2012-02-06 20:25:20

是由於我與語法這麼笨:) – user310291 2012-02-06 20:43:48

JavaScriptInterface不叫

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