【android】Android检查是否已经连接到网络

ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE);
boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
if(wifi|internet){
    //执行相关操作
}else{
    Toast.makeText(getApplicationContext(),
            "亲，网络连了么？", Toast.LENGTH_LONG)
            .show();
}
/*
另外需要权限
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
*/

AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />