Android 常用代码段收集（不断更新）（都经过了姐的试验认证的）

1.判断是否有网络连线

ConnectivityManager connManager =(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);if (connManager != null){NetworkInfo info= connManager.getActiveNetworkInfo();if (info != null && info.isAvailable()){System.out.println("online status is ok");}else{System.out.println("not online");}} 

2.ProgressDialog弹出等待的dialog

出现  progressDialog = ProgressDialog.show(AndroidIM.this, "Loading...", "Please wait...", true, false);

消失  progressDialog.dismiss()