Draw Oval Android basic example

Log.e println needs a message error.
E/AndroidRuntime(330): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{b.paint/b.paint.MainActivity}: java.lang.NullPointerException: println needs a message

Try this code:

		// Error
                String s = null;
		Log.e("bla", s); // !!! error Log.e println needs a message error.
                // OK
		String s = null;
		Log.e("bla", s+""); // OK 

Important: Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB

int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
android.R.layout.simple_list_item_activated_1 :
android.R.layout.simple_list_item_1;


getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setItemChecked(position, true);


Example of usage:

public void updateList() {
		Context ctx = getActivity();
		Notes notes = new Notes(ctx);

		String[] from = { Notes.COLUMN_TITLE };
		int[] to = { android.R.id.text1 };
		int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
				android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_1;
		ListAdapter adapter = new SimpleCursorAdapter(ctx,
				layout, notes.getNotes(), from,
				to, 0);

		setListAdapter(adapter);

		notes.close();
	}

/..................
@Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        
        // Set the item as checked to be highlighted when in two-pane layout
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        getListView().setItemChecked(position, true);
     
    }

Map TreeMap sorted by value Java Android example.

MainClass.java

import java.util.Comparator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;

public class MainClass {
	public static void main(String[] arg) {

		// english;germany dictionary
		String[] arrayOfString = { "one;eine", "two;zwei", "three;drei",
				"four;vier" };

		Map<String, String> map = new TreeMap<String, String>();

		for (String s : arrayOfString) {
			String[] array = s.split(";");
			String sKey = "", sValue = "";
			if (array.length > 1) {
				sKey = array[0];
				sValue = array[1];
				map.put(sKey, sValue);
			}
		}
		for (Entry<String, String> entry: mapSortedByValues(map)) {
		    System.out.println(entry.getKey() + " = " + entry.getValue());
		}
	}

	static <K, V extends Comparable<? super V>> SortedSet<Map.Entry<K, V>> mapSortedByValues(
			Map<K, V> map) {
		SortedSet<Map.Entry<K, V>> sortedSetOfEntries = new TreeSet<Map.Entry<K, V>>(
				new Comparator<Map.Entry<K, V>>() {
					@Override
					public int compare(Map.Entry<K, V> entry_1, Map.Entry<K, V> entry_2) {
						int res = entry_1.getValue().compareTo(entry_2.getValue());
						return res != 0 ? res : 1; 
						// return entry_1.getValue().compareTo(entry_2.getValue());							
					}
				});
		sortedSetOfEntries.addAll(map.entrySet());
		return sortedSetOfEntries;
	}
}
/*
three = drei
one = eine
four = vier
two = zwei
 */

Photo Gallery of Android SDK Samples.
For better understanding of what the source knows there is a gallery of images.
After clicking on the preview displays the actual size and Titlebar
You can read the path to the source file as: Graphics/AnimateDrawables see the project folder
/ApiDemos/src/com/example/android/apis/graphics/AnimateDrawable.java

Goto in for cycle Java example source code.
MainClass.java

public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = {"nothing", "Hello", "people"
				, "bye-bye", "hello", "world!", "end" };
		
	    OuterLoop: for (int i = 0;i<6; i++) {
	        for (int j = 0; j < arrayOfString.length; j++) {
	        	if (arrayOfString[j].equals("world!")) {
	            continue OuterLoop; // as goto from Csharp, or C/C++
	          }
	          System.out.println(arrayOfString[j]);
	          System.out.println(i);
	          if (i == 1) {
	        	  System.out.println("break");
	        	  
	        	  break OuterLoop;
	          }
	        }
	      }
		
	}
}
/*
nothing
0
Hello
0
people
0
bye-bye
0
hello
0
nothing
1
break
*/