自己學習android，經常遇到一些坑，明明其他窗體可以正常在應用內開啟，只是複製了寫過的程式碼，就一直在外部瀏覽器開啟，看了好多文章，總算找到了一些方法 

        private WebView mWebView = null;
        private Activity mActivity;
        private String opUrl;
        mActivity = this;
        mWebView = (WebView) findViewById(R.id.webView);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setAppCacheEnabled(true);
        mWebView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
        mWebView.getSettings().setDomStorageEnabled(true);
        mWebView.addJavascriptInterface(new WebHost(mWebView,mActivity),"js");
        mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        Map<String,String> extraHeaders = new HashMap<String, String>();
        eHeaders = extraHeaders;
        //重寫
        mWebView.setWebViewClient(new WebViewClient(){
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
        });
        mWebView.loadUrl(opUrl);
 

邊學邊記錄，歡迎各位大神評論