Android listview toggle button

问题

I have a Listview that will list the alarms which are in the database.I need to add a Toggle Button beside each list item to set the alarm on/off.

How can I add the Toggle Button in the ListView?

R.layout.alarm_list:

 <?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="@+id/android:list"
      android:layout_width="fill_parent"
        android:layout_height="fill_parent"/>
   <TextView android:id="@+id/android:empty"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/no_reminders"
        android:textColor="#FFF"/>
     </LinearLayout>

Java Code:

      private void fillData() {
    Cursor remindersCursor = aDbHelper.fetchAllAlarms();
    startManagingCursor(remindersCursor);

    // Create an array to specify the fields we want to display in the list
    // (only TITLE)
    String[] from = new String[] { AlarmDbAdapter.KEY_TITLE };

    // and an array of the fields we want to bind those fields to (in this
    // case just text1)
    int[] to = new int[] { R.id.text1};

    // Now create a simple cursor adapter and set it to display
    SimpleCursorAdapter reminders = new SimpleCursorAdapter(this,
            R.layout.alarm_row, remindersCursor, from, to);

    setListAdapter(reminders);
   }

R.layout.alarm_row:

   <?xml version="1.0" encoding="utf-8"?>

   <TextView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/text1"
    android:padding="10dip" android:layout_width="242dp"  
         android:layout_height="wrap_content"/>

My project is getting delayed.

Help

回答1:

There is no small snippet ans. to your problem. I assume you need to have multi-selection. Now here are the things you need.

Since you are using SimpleCursorAdapter, you should replace that with CursorAdapter. To do so you have to extend it as it is a abstract adapter. Once you done that you will be overriding two functions.

• newView Where you will create your list item views by inflating R.layout.alarm_row (it should contain your toggle button too). You have make toggle button non-clickable.
• bindView where you will set state of toggle button and text for your text view

That said this what you need on the Activity side.

• You have make your ListView to multi-selection mode by android:choiceMode in xml or using setChoiceMode.

Now bindView will look like:

ListView lv = ((ListActivity)context).getListView();
// Containing all check states
SparseBooleanArray sba = lv.getCheckedItemPositions();


// I am using check box

cb.setChecked(false);

// Cursor is passed as an argument.
if(sba != null)
  if(sba.get(cursor.getPosition()))
     cb.setChecked(true);

Ref to docs:

CursorAdapter docs

http://developer.android.com/reference/android/widget/ListView.html

回答2:

Try creating a custom adapter like:

public class YourAdapter extends BaseAdapter

and a custom layout for the rows with a toggle button (you will have to inflate the layout in the method geView).

Here you can find an example: http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/

Hope this helps..

来源：https://stackoverflow.com/questions/8398061/android-listview-toggle-button