问题
I'm having problems with my first Android app.
I have subclassed ListActivity, and I'm having no luck getting the overridden onListItemClick() to respond to click events. I've read focus can be a problem, but changing focus in the XML files does not seem to work. Here's the relevant bits of code. Anyone see what's I've buggered up?
public class Notepadv1 extends ListActivity {
private int mNoteNumber = 1;
private NotesDbAdapter mDbHelper;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.notepad_list);
mDbHelper = new NotesDbAdapter(this);
mDbHelper.open();
fillData();
}
private void fillData() {
// Get all of the notes from the database and create the item list
Cursor c = mDbHelper.fetchAllNotes();
startManagingCursor(c);
String[] from = new String[] { NotesDbAdapter.KEY_TITLE };
int[] to = new int[] { R.id.text1 };
SimpleCursorAdapter notes =
new SimpleCursorAdapter(this, R.layout.notes_row, c, from, to);
setListAdapter(notes);
}
@Override
public void onListItemClick (ListView l, View v, int position, long id){
super.onListItemClick(l, v, position, id);
AlertDialog alert = new AlertDialog.Builder(this).create();
String message = "row clicked!";
alert.setMessage(message);
alert.show();
}
notepad_list.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ListView
android:id="@android:id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:dividerHeight="6dp"/>
<TextView android:id="@android:id/empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/no_notes" />
</LinearLayout>
And notes_row.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView android:id="@+id/text1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:focusable="false"/>
回答1:
I created a ListActivity, used your onListItemClick, and notes_row.xml. The code works for me. However, I believe you are expecting the entire row to respond to a click, according to notes_row you need to click on the text itself (not anywhere in the row).
Try changing the width attribute in notes_row.xml to "match_parent"
:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text1"
android:layout_height="60dp"
android:layout_width="match_parent"
android:focusable="false" />
Now the entire row responds to user clicks.
回答2:
Another potential solution in case this helps anyone: I had a Button in each of my list items, and this prevented my onListItemClick event from firing. Replacing the Button with a TextView that looked exactly the same made it work.
回答3:
Implements OnItemClickListener and do list.setOnItemClickListener.
public class Notepadv1 extends ListActivity implements OnItemClickListener {
onCreate()
{
....
((ListView)findViewById(android.R.id.list)).setOnItemClickListener(this)
}
}
来源:https://stackoverflow.com/questions/11369382/android-onlistitemclick-not-getting-called-in-listactivity