CODEWITHSUNDEEP
androidsimplecursoradapterandroid-cursoradapter
Ulug'bek
Ulug'bek

Reputation: 2832

How can I use this.getSelectedItemId() in Android

I start learning android just now with sample examples. I encountered one problem. 

public class ContactActivity extends ListActivity implements OnItemClickListener {
    private Cursor mCursor;
    private ListAdapter mAdapter;
    private static final String[] mContent = new String[]{
       ContactDbHelper._ID,ContactDbHelper.NAME,ContactDbHelper.PHONE
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mCursor = managedQuery(ContactProvider.CONTENT_URI, mContent, null, null, null);
         mAdapter = new SimpleCursorAdapter(this, R.layout.main, mCursor, 
             new String[]{ ContactDbHelper.NAME, ContactDbHelper.PHONE },
             new int[]{ R.id.name, R.id.phone } );
        setListAdapter(mAdapter);
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        getListView().setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
        Log.i("position: ", "" + position);
        Log.i("id", "" + id);
        setSelection(position);
}

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        long id = this.getSelectedItemId();
        Log.i("id: ", "" + id);
        switch(item.getItemId()) {
            case IDM_ADD: { CallAddContactDialog(); } break;
            case IDM_EDIT: if(id > 0) { CallEditContactDialog(id); } 
                  else {
                        Toast.makeText(this,R.string.toast_notify,Toast.LENGTH_SHORT).show();
                  } break;
             case IDM_DELETE: if (id > 0) { CallDeleteContactDialog(id); } else {
                       Toast.makeText(this, R.string.toast_notify, Toast.LENGTH_SHORT).show();
                   } break;
        }               
    return super.onOptionsItemSelected(item);
    }
}

It has been written here - this.getSelectedItemId() , and the code returned INVALID_ROW_ID, I read its documentation, but I didn't find any way to resolve it. What do I need to add to resolve the problem ? What does this.getSelectedItemId() returned , in general? Thanks in advance!

EDIT:

My xml file like this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <TextView
        android:id="@+id/name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true" 
        android:textSize="18sp"/>    
    <TextView
        android:id="@+id/phone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true" 
        android:textSize="18sp"
        android:paddingRight="10dp"/>
</RelativeLayout>

Upvotes: 1

Views: 2259

Answers (2)

Hoan Nguyen
Hoan Nguyen

Reputation: 18151

When you select an item in a listview getSelectedItemId () returns the _id of the selected item or INVALID_ROW_ID if no item is selected.
You need to implement OnItemClickListener and in onItemClick call setSelection(position) then your code will work.

Upvotes: 2

Cornholio
Cornholio

Reputation: 985

edit:

You're using the wrong method; for a ListView, you need to set an OnClickListener. This method is for the activity's menu.

Use item.getItemId() instead. Here's an example:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.menu.do_stuff: {
                // Do stuff
            } case R.menu.do_stuff2: {
                // Do other stuff
            }
    }
}

Upvotes: 1

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