小编Mad*_*Alb的帖子

所以每次我运行应用程序时,输入一个ID并点击提交; 最终结果以null作为ID.

例如:我想输入12345它应该去http://www.hiddenlink.com/12345,但它转到http://www.hiddenlink.com/null

这是我的代码:

public class SearchActivity extends Activity {
Button btnSearchStudent;
String studentID;
private String url = "http://www.hiddenlink.com/" + studentID; // This is test SID just to confirm connection
private static final String TAG_ALLRECORDS = "Objects";
private static final String TAG_ENAME = "emer_name1";
private static final String TAG_EPHONE1 = "emer_Phone1";
private static final String TAG_EPHONE2 = "emer_Phone2";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    EditText txtStudentID = (EditText) findViewById(R.id.txtStudentID);
    studentID = txtStudentID.getText().toString();
    btnSearchStudent = (Button) …