android - 如何为 twitter.getAccountSettings() : Android 实现 AsyncTask

Question

我在我的应用程序中使用 twitter4j。我正在使用下面的代码来检查授权 token 是否已过期或用户是否尚未登录

public static boolean isAuthenticated(Context context) {

        TwitterPrefrences twitterPref = new TwitterPrefrences(context);     
        String token = twitterPref.getTwitterAuthToken();
        String secret = twitterPref.getTwitterAuthTokenSecrate();

        AccessToken a = new AccessToken(token,secret);
        Twitter twitter = new TwitterFactory().getInstance();
        twitter.setOAuthConsumer(Constants.TWITT_CONSUMER_KEY, Constants.TWITT_CONSUMER_SECRET);
        twitter.setOAuthAccessToken(a);

        try {
            twitter.getAccountSettings();
            return true;
        } catch (TwitterException e) {
            return false;
        }

    }

但是我得到以下错误

 05-02 19:52:23.531: E/AndroidRuntime(1441): FATAL EXCEPTION: main
    05-02 19:52:23.531: E/AndroidRuntime(1441): android.os.NetworkOnMainThreadException
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at java.net.InetAddress.getAllByName(InetAddress.java:220)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:479)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at twitter4j.internal.http.HttpResponseImpl.<init>(HttpResponseImpl.java:45)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:178)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:75)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at twitter4j.internal.http.HttpClientWrapper.get(HttpClientWrapper.java:103)
    05-02 19:52:23.531: E/AndroidRuntime(1441):     at 

twitter4j.Twitter.getAccountSettings(Twitter.java:1440)

调用者代码为

chbTwOption.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked) {
                    boolean showTwlogin = false;
                    if ("No".equalsIgnoreCase(twitPref.getTwitterAuthToken())
                            || "No".equalsIgnoreCase(twitPref.getTwitterAuthTokenSecrate())) {
                        showTwlogin = true;
                    } else {                        
                        showTwlogin = TwitterUtils.isAuthenticated(AddSchedule.this);
                    }   

                    if(showTwlogin) {
                        showSocialMediaLoginMessage(Constants.TW_LOGIN_MESSAGE);
                    }
                }
            }
        });

很明显，我必须为 twitter.getAccountSettings() 实现 AsyncTask，但是如何从 AsyncTask 中获取结果作为方法？还有其他方法可以检查身份验证 token 是否过期吗？或者我如何将 AsyncTask 实现为一种方法，它将返回结果作为我使用的 isAuthenticated() 。

请指导我。

谢谢。

Answer 1

您可以查看 Zwitscher 的来源尤其是在 TwitterLoginActivity