Ok, I have tried a lot of things, and I found out that the best way to do
it is to create a new activity, and extend it from ListActivity and use all
the life saving methods that are already there, just waiting for us...
On Sun, Apr 1, 2012 at 8:16 PM, Ted Scott <t...@hootinholler.com> wrote:
> On 4/1/2012 3:19 PM, Ricardo Santos wrote:
>
> Hi Ted,
> Maybe I have understood the theory, now, but my code still do not work.
> So, my code looks like this:
>
> //This is my list view
>
> ListView charList = (ListView)findViewById(R.id.list);
>
> R.id.list needs to be the id of a ListView element...
>
> //Setting up the from String[]
>
> String[] from = new String[]{"name"};
>
> //Setting up the to int[]
>
> int[] to = new int[]{R.id.lstCharacters};
>
>
> //Now, I set the SimpleCursorAdapter
>
> SimpleCursorAdapter simplCursor = new SimpleCursorAdapter(this, R.id.list,
> loadCharacterCursor, from, to);
>
> the R.id.list should not be a ListView, it should be resource identifier
> of a layout file that defines the views for each row in the list.
>
> //Setting the adapter do the list - here it crashes.
>
> charList.setAdapter(simplCursor);
>
> I cant see what I'm doing wrong. Can anyone shed (some) more light to
> the subject?
>
>
> I've never used a list view outside of a class extending ListActivity.
>
>
> Ricardo
>
>
> On Sun, Apr 1, 2012 at 12:33 AM, Ted Scott <t...@hootinholler.com> wrote:
>
>> Hi Ricardo,
>>
>> First, I'm sure others will chime in if this is bad advice, but my
>> understanding is that it is better to use the compatibility package and
>> cursor loaders and a load manager. See
>> http://developer.android.com/reference/android/widget/SimpleCursorAdapter.htmland
>> the base CursorAdapter.
>>
>> That said, from is simply a list of columns in the PROJECTION exposed by
>> the cursor that are of interest to the ListView ids in the to array. This
>> is in order of the two arrays such that the data from from[x] is passed to
>> the view with the id in to[x].
>>
>> Given the list view row definition:
>>
>> <?xml version="1.0" encoding="utf-8"?>
>> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android";
>> android:layout_width="fill_parent"
>> android:layout_height="34dp"
>> android:gravity="bottom"
>> android:orientation="horizontal">
>>
>> <TextView xmlns:android="http://schemas.android.com/apk/res/android";
>> android:id="@+id/foo"
>> android:layout_width="100dp"
>> android:layout_height="30dp"
>> android:textSize="16dp"
>> android:gravity="center_vertical"
>> android:paddingLeft="5dip"
>> android:singleLine="true"
>> />
>> <TextView xmlns:android="http://schemas.android.com/apk/res/android";
>> android:id="@+id/bar"
>> android:layout_width="50dp"
>> android:layout_height="30dp"
>> android:textSize="20dp"
>> android:gravity="right|center_vertical"
>> android:paddingLeft="5dip"
>> android:singleLine="true"
>> />
>> </LinearLayout>
>>
>> And assuming that you have column1 and column2 in your cursor's
>> projection, and want to map the contents of column1 to the textview foo and
>> column2 to textview bar, from and to would be defined something like:
>>
>> String[] from = new String[] { "column1" , "coulmn2"};
>> int[] to = new int[] { R.id.foo , R.id.bar };
>>
>> Clear as mud?
>>
>> -Ted
>>
>>
>> On 3/31/2012 9:36 PM, Ricardo Santos wrote:
>>
>>> Hello everyone!
>>>
>>> I have in my application, I hace a list view that needs to be populated
>>> with data from a database, I have tested my database and my app is handling
>>> the data correctly, but I cant populate the list view, I have read about
>>> the SimpleCursorAdapter but I cant understand how to use the class,
>>> specially the from and to fields, does anyone know how to use it?
>>>
>>> My class is not extending ListActivity, my list view is inside a dialog.
>>>
>>> Ricardo
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