问webview无法从SD卡加载html文件

EN

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    addB = (Button) findViewById(R.id.add);
    webComp = (WebView) findViewById(R.id.webC);

    WebSettings webSettings = webComp.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setSupportZoom(false);
    webSettings.setAllowFileAccess(true);
    webSettings.setLoadsImagesAutomatically(true);
    webSettings.setSavePassword(false);
    webSettings.setSaveFormData(false);
    webSettings.setJavaScriptEnabled(true);        

    webComp.setWebViewClient(new HelloWebViewClient());                    



    webComp.loadUrl("/sdcard/FMS/1/message.html");            



}