I would like to know if a ListView in Android has an option to place alphabets on the right like the paradigm of iPhone ListView, like below
If yes, can someone provide me with sample codes.
I am not looking for the one with an Alphabet overlay from ApisDemo but an exact one like the iPhone paradigm. Is it possible?
You can check this project https://github.com/woozzu/IndexableListView. Here is the screenshot
I implemented somthing similar a while back so i've modified my activity and you can take a look below, sorry its not very well commented - hope it helps!
public class AZIndexer extends Activity {
ListView myListView;
ArrayList<String> elements;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// elements
String s = "MNBVCXZLKJHGFDSAQWERTYUIOP";
Random r = new Random();
elements = new ArrayList<String>();
for (int i = 0; i < 300; i++) {
elements.add(s.substring(r.nextInt(s.length())));
}
Collections.sort(elements); // Must be sorted!
// listview
myListView = (ListView) findViewById(R.id.myListView);
myListView.setFastScrollEnabled(true);
MyAZAdapter<String> adapter = new MyAZAdapter<String>(
getApplicationContext(), android.R.layout.simple_list_item_1,
elements);
myListView.setAdapter(adapter);
}
class MyAZAdapter<T> extends ArrayAdapter<T> implements SectionIndexer {
ArrayList<String> myElements;
HashMap<String, Integer> azIndexer;
String[] sections;
public MyAZAdapter(Context context, int textViewResourceId, List<T> objects) {
super(context, textViewResourceId, objects);
myElements = (ArrayList<String>) objects;
azIndexer = new HashMap<String, Integer>(); //stores the positions for the start of each letter
int size = elements.size();
for (int i = size - 1; i >= 0; i--) {
String element = elements.get(i);
//We store the first letter of the word, and its index.
azIndexer.put(element.substring(0, 1), i);
}
Set<String> keys = azIndexer.keySet(); // set of letters
Iterator<String> it = keys.iterator();
ArrayList<String> keyList = new ArrayList<String>();
while (it.hasNext()) {
String key = it.next();
keyList.add(key);
}
Collections.sort(keyList);//sort the keylist
sections = new String[keyList.size()]; // simple conversion to array
keyList.toArray(sections);
}
public int getPositionForSection(int section) {
String letter = sections[section];
return azIndexer.get(letter);
}
public int getSectionForPosition(int position) {
Log.v("getSectionForPosition", "called");
return 0;
}
public Object[] getSections() {
return sections; // to string will be called to display the letter
}
}
}
With xml as:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/myListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</ListView>
</LinearLayout>
ScreenShot:
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