检查android中可用的网络 [英] Check network available in android

问题描述

我必须开发一个安卓应用程序.

I have to develop one android application.

在这里，我必须开发一个 twitter 集成 android 应用程序.

Here i have to develop one twitter integration android application.

我使用了以下代码:

public void onClickTwitt() {
    if (isNetworkAvailable()) {
        Twitt twitt = new Twitt(getActivity(), consumer_key, secret_key);
        twitt.shareToTwitter(_Title);
    } else {
        showToast("No Network Connection Available !!!");
    }
}
public boolean isNetworkAvailable() {
     ConnectivityManager connectivity =(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    if (connectivity == null) {
        return false;
    } else {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info != null) {
            for (int i = 0; i < info.length; i++) {
                if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                    return true;
                }
            }
        }
    }
    return false;
}

这里出现以下错误:

The method getSystemService(String) is undefined for the type 
 SubCate

请帮帮我...我该如何解决这些错误????

Please help me...How can i resolve these error ????

推荐答案

public void onClickTwitt() {
    if (isNetworkAvailable(this)) {
        Twitt twitt = new Twitt(getActivity(), consumer_key, secret_key);
        twitt.shareToTwitter(_Title);
    } else {
        showToast("No Network Connection Available !!!");
    }
}
public boolean isNetworkAvailable(Context context) {
    ConnectivityManager connectivity =(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

    if (connectivity == null) {
        return false;
    } else {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        for (NetworkInfo networkInfo : info) {
            if (networkInfo.getState() == NetworkInfo.State.CONNECTED) {
                return true;
            }
        }
    }
    return false;
}

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