So you need to change the text size of simple_list_item_single_choice...

I feel you.

I tried for a month straight to call the checkedtextview in the android standard layout and resize the text. It never let me. I felt like a idiot. And now that I've figured it out, I know that it is more than just a feeling.

And so I'm posting it here, in the event that I actually forget how to do this later on. Because.. you know... I'm an idiot.

I went and copied the xml from the api demo and pasted it into a new .xml file(step 1). I accessed the text size and adjusted it thusly (step 2). Then I changed the java code to replace the simple_list_item_single_choice with my own custom row layout (step 3). Facepalmed for about two hours (step 4).

my_listitem_singlechoice.xml (i just chaged "textAppearance" attribute but I'm sure you can do other stuff to it too) :


<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:gravity="center_vertical"
    android:checkMark="?android:attr/listChoiceIndicatorSingle"
    android:paddingLeft="6dip"
    android:paddingRight="6dip"
/>



my_java_with_singlechoice.java (this should look somewhat familiar) :


        ListView lv = this.getListView();
MyListAdapter = new ArrayAdapter<String>(this, R.layout.my_listitem_singlechoice, myArrayList);
lv.setAdapter(MyListAdapter );
lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

Deleting Single Choice Listview Items

This post assumes you know how to create a single choice listview and a button in xml.

1) First, define these three variables:


     public static List<String> strings;
     public static ListAdapter adapter;
     ListView lv;

2) Next, set up the listview in onCreate:


     strings = new ArrayList<String>();
     lv = getListView();
     adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_single_choice, strings);
     lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
     lv.setAdapter(adapter);



3) Last, set up the delete button:


     Button btnRemove = (Button) findViewById(R.id.ButtonEditLabOrderForm_Remove);
     btnRemove.setOnClickListener(new View.OnClickListener() {
          @SuppressWarnings("unchecked")
          public void onClick(View v) {
               // Code below only works with ONE CHECKED ITEM at a time
               int len = lv.getCount();
SparseBooleanArray checked = lv.getCheckedItemPositions();
for (int i = 0; i < len; i++)
if (checked.get(i)) {
String item = strings.get(i);
// do whatever you want with the checked item
strings.remove(item);
((ArrayAdapter<String>) adapter).notifyDataSetChanged();
}
   }
     });

Thats it !

Still trying to figure out how to delete multiple items in a multiple choice list :(

Seriously, this is how I made a multi-column list item populated by strings!!

1) The item layout:

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout01"
android:layout_alignParentLeft="true"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_width="fill_parent">
<TextView
android:layout_height="wrap_content"
android:id="@+id/TextView_Title"
android:text="Title"
android:textSize="15px"
android:layout_width="fill_parent"></TextView>

<LinearLayout
android:id="@+id/LinearLayout02"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_height="wrap_content"
android:id="@+id/TextView_Item1"
android:text="Item1"
android:layout_width="wrap_content"
android:textSize="10px" android:layout_weight="1"/>
    <TextView
android:layout_height="wrap_content"
android:id="@+id/TextView_Item2"
android:text="Item2"
android:layout_width="wrap_content"
android:textSize="10px" android:layout_weight="1"/>
<TextView
android:layout_height="wrap_content"
android:id="@+id/TextView_Item3"
android:text="Item3"
android:layout_width="wrap_content"
android:textSize="10px" android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>



2) Build the custom adapter:

// CUSTOM TWO ROW LIST ADAPTER
static class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;

public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}

public int getCount() {
return title.size();
}

public Object getItem(int position) {
return position;
}

public long getItemId(int position) {
return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.listitem_addrx, null);
holder = new ViewHolder();
holder.txtTitle = (TextView) convertView.findViewById(R.id.TextView_Title);
holder.txtItem1 = (TextView) convertView.findViewById(R.id.TextView_Item1);
holder.txtItem2 = (TextView) convertView.findViewById(R.id.TextView_Item2);
holder.txtItem3 = (TextView) convertView.findViewById(R.id.TextView_Item3);

convertView.setTag(holder);
holder = (ViewHolder) convertView.getTag();
}

holder.txtTitle.setText(title.get(position));
holder.txtItem1.setText(one.get(position));
holder.txtItem2.setText(two.get(position));
holder.txtItem3.setText(three.get(position));

return convertView;
}

static class ViewHolder {
TextView txtTitle;
TextView txtItem1;
TextView txtItem2;
TextView txtItem3;
}
} // end custom adapter

3) Call the following items:

static ListView lv;
public static ListAdapter adapter;
String selected;
static final ArrayList<String> title = new ArrayList<String>();
static final ArrayList<String> one = new ArrayList<String>();
static final ArrayList<String> two = new ArrayList<String>();
static final ArrayList<String> three = new ArrayList<String>();

4) Set the list adapter:

lv = (ListView) getListView();
        lv.setAdapter(new EfficientAdapter(this));

5) Add entries to list:

Either define a string array when you call the variables in step 3 or add items dynamically:

title.add(selected);
route.add(selected);
strength.add(selected);
form.add(selected);

lv.setAdapter(new EfficientAdapter(getBaseContext()));


References (& many, many thanks to):

Custom list row & adapter: http://www.androidpeople.com/android-custom-dynamic-listview/

Custom spinner row & adapter: http://android-er.blogspot.com/2010/12/custom-arrayadapter-for-spinner-with.html


Update with my version later...

Repainting a ListView Adapter from a Separate Activity

Basically, I have a page with a search box. You search for something, get the results in the form of a list on a pop-up dialog (which has its own activity). When you select one of the results, the dialog closes, and the item is added to the original page with the search box. You can repeat this, ad nauseum. *NOTE* This method requires an API level of at least 1.6.

PageOne.java
Be sure to declare variables for the strings and adapter before onCreate. Static makes it available to use by other activities in the package:


static List<String> strings; ListView lv; static ListAdapter adapter;


Define these variables inside onCreate:


strings = new ArrayList<String>();   
lv = getListView();
adapter = new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, strings);
lv.setAdapter(adapter);


PageTwo.java

In the onClick method, add code to transform selected item to a string value. Then, adds the item to the String Array in PageOne. Last, notifyDataSetChanged on the adapter used in pageone:


@Override  
public void onListItemClick(ListView parent, View v, int position, long id) {  
selected = ((TextView) v).getText().toString();  
PageOne.strings.add(selected);  
((ArrayAdapter<String>) PageOne.adapter).notifyDataSetChanged();  
this.finish();  
}

Easy ListView with Anchored Header/Footer and "Custom" Row Layout.

This is the basic listview that has been working great for me.

Disclaimer: While the list item view for this is "custom" it does not allow you to provide more than one view per list item. You can customize that one item (background, font, size, color, etc.) To add more views to a list item please see my entry on custom list adapters.

First is the page layout. I only included a simple textview header, but it could easily be replaced with buttons or checkboxes or anything. The surrounding linear layout but be set to "fill_parent" height and width and also have a vertical orientation. The listview width should be set to "fill_parent" so that the whole list row is clickable and not just the text. layout_weight should be set to 1 which will cause the listview to expand to the height of available space in the window, pushing the header or footer to be docked at the top or bottom.



pageone.xml

xmlns:android="http://schemas.android.com/apk/res/android"

  android:layout_height="fill_parent"
  android:layout_width="fill_parent"
  android:orientation="vertical" >

<TextView android:layout_height="wrap_content"
  android:layout_width="fill_parent"
  android:text="This is the Header"
  android:id="@+id/Header" >
</TextView>

<ListView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:layout_weight="1"
  android:textFilterEnabled="true"
  android:id="@android:id/list" >
</ListView>
</LinearLayout>

The row layout is important if you want to customize the look of your list (like text size, color, etc). Otherwise, android has some built in layouts that can be used. In my example, I am just using a single textview (easily populated by string values using simpleadapter) with a small font. Add more textviews in a horizontal linear layout for columns, or vertical for two rows of text. Use relative layout to add photos and for even more customization. Remember the id of the textviews that will be populated by simple adapter later on. (EDIT: If you want to use additional text views, image views check boxes or whatever, you need to use a custom adapter!)

list_item.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:padding="10dp"
  android:textSize="16sp"
  android:id="@+id/label">
</TextView>

In the java file, include a String of the items you want to display before the onCreate. Set the list Adapter in onCreate. Set up list item click event handler after onCreate. Right now, it is set up to display a toast message of the list item selected.

PageOne.java

public class StepTherapy extends ListActivity {

String[] items={"lorem", "ipsum", "dolor", "sit", "amet",
"consectetuer", "adipiscing", "elit", "morbi", "vel",
"ligula", "vitae", "arcu", "aliquet", "mollis",
"etiam", "vel", "erat", "placerat", "ante",
"porttitor", "sodales", "pellentesque", "augue",
"purus"};
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.steptherapy);

ListView lv = (ListView)getListView();
        lv.setAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, items));
    public void onListItemClick(ListView parent, View v, int position, long id) {
            Toast.makeText(getApplicationContext(), ((TextView) v).getText(), Toast.LENGTH_SHORT).show();
}
}