Code Fragment-重構行數比較多的大方法。

經常有這樣的情況，一個方法裡有很多的代碼，不得不通過上下滑動螢幕來閱讀代碼。這種行數比較大的方法，有如下的缺點

• 由雩都是細節，給讀者很高層次理解代碼帶來問題。
• 很難抓住主次。

一個例子：

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        String userSafetylegalUrl = SystemProperties.get(PROPERTY_LSAFETYLEGAL_URL);        final Configuration configuration = getResources().getConfiguration();        final String language = configuration.locale.getLanguage();        final String country = configuration.locale.getCountry();        String loc = String.format("locale=%s-%s", language, country);        userSafetylegalUrl = String.format("%s&%s", userSafetylegalUrl, loc);        mWebView = new WebView(this);        // Begin accessing        mWebView.getSettings().setJavaScriptEnabled(true);        if (savedInstanceState == null) {            mWebView.loadUrl(userSafetylegalUrl);        } else {            mWebView.restoreState(savedInstanceState);        }        mWebView.setWebViewClient(new WebViewClient() {            @Override            public void onPageFinished(WebView view, String url) {                // Change from 'Loading...' to the real title                mAlert.setTitle(getString(R.string.settings_safetylegal_activity_title));            }            @Override            public void onReceivedError(WebView view, int errorCode,                    String description, String failingUrl) {                showErrorAndFinish(failingUrl);            }        });        final AlertController.AlertParams p = mAlertParams;        p.mTitle = getString(R.string.settings_safetylegal_activity_loading);        p.mView = mWebView;        p.mForceInverseBackground = true;        setupAlert();    }

修改後：

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        String userSafetylegalUrl = initConfigs();        initWebVoew(savedInstanceState, userSafetylegalUrl);        initAlert();    }