import android.app.Activity; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class NetworkDetector { /** * 判断网络是否可用 * @param act * @return */ public static Boolean detect(Activity act) { ConnectivityManager manager = (ConnectivityManager) act .getApplicationContext().getSystemService( Context.CONNECTIVITY_SERVICE); if (manager == null) { return false; } NetworkInfo networkinfo = manager.getActiveNetworkInfo(); if (networkinfo == null || !networkinfo.isAvailable()) { return false; } return true; } }
因为以上代码用到了权限,需要在AndroidManifest文件中加入如下权限代码:
<uses-permission
android:name="android.permission.ACCESS_NETWORK_STATE" />