Android - Call Method With A Button From XML

Question

I've got an app based on Sliding Tabs layout. I want to call the addMedicine method in the PageFragment class from an XML layout with a Button . The issue is that i cannot assign the method to the Button onClick event.

Here's the PageFragment class:

public class PageFragment extends Fragment {
public static final String ARG_PAGE = "ARG_PAGE";

private int mPage;

// TEMP VARIABLES //
ListView ItemsLst;
String[] Items = {"Medicine 1", "Medicine 2", "Medicine 3"};
TextView output;

EditText nameFld;
EditText formatFld;
EditText amountFld;
EditText exp_dateFld;
EditText timeFld;

DBManager dbAdapt = new DBManager(getActivity());

public static PageFragment newInstance(int page) {
    Bundle args = new Bundle();
    args.putInt(ARG_PAGE, page);
    PageFragment fragment = new PageFragment();
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mPage = getArguments().getInt(ARG_PAGE);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = null;
    switch(mPage)
    {
        case 1:
            view = inflater.inflate(R.layout.layout_sqltest, container, false);

            nameFld = (EditText) view.findViewById(R.id.nameFld);
            formatFld = (EditText) view.findViewById(R.id.formatFld);
            amountFld = (EditText) view.findViewById(R.id.amountFld);
            exp_dateFld = (EditText) view.findViewById(R.id.exp_dateFld);
            timeFld = (EditText) view.findViewById(R.id.timeFld);

            return view;
        case 2:
            view = inflater.inflate(R.layout.layout_settings, container, false);
            return view;
        case 3:
            view = inflater.inflate(R.layout.layout_info, container, false);
            return view;
    }
    return view;
}

public void addMedicine() // The method i want to call
{
    String name = nameFld.getText().toString();
    String format = formatFld.getText().toString();
    int amount = Integer.parseInt(amountFld.getText().toString());
    String exp_date = exp_dateFld.getText().toString();
    String time = timeFld.getText().toString();

    long id = dbAdapt.addMedicine(name, format, amount, exp_date, time);

}
}

And here is the layout_sqltest XML file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Name"
        android:id="@+id/nameLbl"
        android:layout_gravity="center_horizontal" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/nameFld"
        android:layout_gravity="center_horizontal"
        android:inputType="text" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Format"
        android:id="@+id/formatLbl"
        android:layout_gravity="center_horizontal" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/formatFld"
        android:layout_gravity="center_horizontal"
        android:inputType="text" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Amount"
        android:id="@+id/amountLbl"
        android:layout_gravity="center_horizontal" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/amountFld"
        android:layout_gravity="center_horizontal"
        android:inputType="text" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Expiration Date"
        android:id="@+id/exp_dateLbl"
        android:layout_gravity="center_horizontal" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/exp_dateFld"
        android:layout_gravity="center_horizontal"
        android:inputType="text" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Time"
        android:id="@+id/timeLbl"
        android:layout_gravity="center_horizontal" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/timeFld"
        android:layout_gravity="center_horizontal"
        android:inputType="text" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Add Medicine"
        android:id="@+id/addMedicineBtn"
        android:layout_gravity="center_horizontal" />

</LinearLayout>

The addMedicineBtn is the button i want to call the method with. Someone can help me? I really need that! Thank you in advance!

EDIT: I tried giving to addMedicine method the View param, but it still doesn't appear in the available methods for the addMedicineBtn in the onClick properties (I'm using Android Studio).

Answer 1

尝试使用 onClickListener

view.findViewById(R.id.addMedicineBtn).setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v) { addMedicine(); } });

Answer 2

You must add tools:context="PageFragment" line to the container ( LinearLayout ) of PagerFragment 's layout file ( layout_sqltest ). Then onClick() method will find methods in PagerFragment class.