发送：

//             intent = new Intent(this,xxxxxxx.class); 

//             intent.putExtra("idnumber", idnumber);

//             startActivity(intent);

接收：

         //把传送的身份证号取出来

          Intentintent = getIntent();//两种方法都可以写

          //Intentintent = new Intent(this, RegisterForMoblieActivity.class);

          idnumber =intent.getStringExtra("idnumber");