相关疑难解决方法(0)

我需要告诉我的设备是否有Internet连接.我找到了许多答案,如:

private boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager 
         = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null;
}

^{(摘自检测Android上是否有可用的Internet连接.)}

但这是不对的,例如,如果我连接到无法访问Internet的无线网络,此方法将返回true ... 是否有方法可以判断设备是否具有Internet连接,而不是仅仅连接什么？

我尝试了下面的代码来检查我的手机是否连接到无线网络,当我想知道我的手机是否连接到网络时它运行良好,但它无法提供有关互联网访问的信息...类似于" Ping"任何网站.实际上我遵循了许多链接,但仍然没有答案,所以如果有人能提供帮助,我会非常感激.

提前致谢.

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Toast t = new Toast(getApplicationContext());

    if (isInternetOn()) {
         // INTERNET IS AVAILABLE, DO STUFF..
         Toast.makeText(ConnectivityTestActivity.this,"Network is Available", Toast.LENGTH_LONG).show();

         }
    else {
         // NO INTERNET AVAILABLE, DO STUFF..
        Toast.makeText(ConnectivityTestActivity.this,"No Network Available", Toast.LENGTH_LONG).show();

        }
}

public final boolean isInternetOn() {


    ConnectivityManager connec =  (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    // ARE WE CONNECTED TO THE NET
    if ( connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED ||
    connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING ||
    connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING ||
    connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED ) {
    // …