我希望Current
在点击时执行一个函数,我尝试过这个方法,因为它对我来说是从另一个项目中工作的,但我在这里缺少或做错了,因为它不起作用。
我的XML文件上有一个ID为myButton
的按钮,我的java上有一个VazhdoButoni
。
当我转到我的XML文件和我的按钮属性时,在public gogogo (View v) {
选择框中,我看不到我的onClick
功能。
课程是:
public gogogo
视图是:
public class BikeFragment extends Fragment {
Java代码:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_bike, container, false);
}
xml按钮:
public void gogogo (View v) {
TextView tv = (TextView)v.findViewById(R.id.teksti2);
username = ((EditText)v.findViewById(R.id.user2)).getText().toString();
password = ((EditText)v.findViewById(R.id.pass2)).getText().toString();
try {
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Connection con = DriverManager.getConnection(url, username, password);
// System.out.println("Database connection success.");
String result = "Database connection success\n";
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("select * from tblItems");
ResultSetMetaData rsmd = rs.getMetaData();
while(rs.next()) {
result += rsmd.getColumnName(1) + ": " + rs.getInt(1) + "\n";
result += rsmd.getColumnName(2) + ": " + rs.getString(2) + "\n";
result += rsmd.getColumnName(3) + ": " + rs.getString(3) + "\n";
}
tv.setText(result);
}
catch(Exception e) {
e.printStackTrace();
tv.setText(e.toString());
}
}
答案 0 :(得分:2)
你错过了onClick标签
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Vazhdo"
android:id="@+id/VazhdoButoni"
android:onClick="gogogo"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="340dp"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp" />