Android：简单的Web应用程序会崩溃，而不是http方案

问题描述

|| 我是为Android开发的初学者，如果这很明显，请原谅。我使用android.com中的示例创建了一个简单的Web应用程序，但是，当单击诸如tel：或mailto：的链接时，该应用程序崩溃并要求我强制退出。我想知道是否有人可以告诉我原因。

public class MyApplication extends Activity {

    WebView mWebView;

    private class InternalWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view,String url) {

            // This is my web site,so do not override; let my WebView load the page
            if (Uri.parse(url).getHost().equals(\"m.mydomain.nl\")) {
                return false;
            } else {
                // Otherwise,the link is not for a page on my site,so launch another Activity that handles URLs
                Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse(url));
                startActivity(intent);
                return true;
            }

        }
    }

    @Override
    public boolean onKeyDown(int keyCode,KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
            mWebView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode,event);
    }

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

        /* Use the WebView class to display website */
        mWebView = (WebView) findViewById(R.id.webview);
        mWebView.setWebViewClient(new InternalWebViewClient());
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.loadUrl(\"http://m.mydomain.nl/\");
    }

}

    

解决方法

抱歉，如此愚蠢，实际上已将其修复。使用mailto时，没有主机，因此getHost（）将返回null并导致异常。

private class InternalWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view,String url) {

        // This is my web site,so do not override; let my WebView load the page
        if (Uri.parse(url).getHost() != null && Uri.parse(url).getHost().equals(\"m.domain.nl\")) {
            return false;
        } else {
            // Otherwise,the link is not for a page on my site,so launch another Activity that handles URLs
            Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse(url));
            startActivity(intent);
            return true;
        }

    }
}