【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" />