gistfile1.java

	public void login(View view) {
		// Test code only
		
		final class completionCallback implements Callback<Boolean> {
			Activity a;
			public completionCallback(Activity object) {
				a = object;
			}
			public void onCallback(Boolean data) {
				if (data) {
					Log.i("login", "Login success");
					Intent intent = new Intent(a, HomeActivity.class);
					startActivity(intent);
				}
				else {
					Log.i("login", "Login failed");
				}
				
				ProgressBar pb = (ProgressBar) findViewById(R.id.spinner);
				pb.setVisibility(View.INVISIBLE);
			}
		}
		ProgressBar pb = (ProgressBar) findViewById(R.id.spinner);
		pb.setVisibility(View.VISIBLE);
		
		EditText usernameBox = (EditText)findViewById(R.id.editText1);
		EditText passwordBox = (EditText)findViewById(R.id.editText2);
		
		Log.i("login", "Login initiated");
		GraffitiCom.logIn(usernameBox.getText().toString(), passwordBox.getText().toString(), new completionCallback(this));
	}

GraffitiCom.java

final class GraffitiCom {
	private static GraffitiClient singleton = null;
	
	private GraffitiCom() {
	}
	
	public static void setHost(String hostname, boolean devserver) throws MalformedURLException {
		singleton = new GraffitiClient(new URL(hostname), devserver);
	}
	
	public static void logIn(final String username, final String password,
			final Callback<Boolean> completionCallback) {
		singleton.logIn(username, password, completionCallback);
	}
	
	public static void uploadImage(final File imageFile,
			final Callback<String> completionCallback) {
		singleton.uploadImage(imageFile, completionCallback);
	}
	
	public static void storePositionedSketch(final PositionedSketch posSketch,
			final Callback<PositionedSketch> completionCallback) {
		singleton.storePositionedSketch(posSketch, completionCallback);
	}
	
	public static void getMyImages(final Callback<Collection<Image>> completionCallback) {
		singleton.getMyImages(completionCallback);
	}
	
	public static void getMyPositionedSketches(
			final Callback<Collection<PositionedSketch>> completionCallback) {
		singleton.getMyPositionedSketches(completionCallback);
	}
	
	public static void getPublicPositionedSketches(
			final Callback<Collection<PositionedSketch>> completionCallback) {
		singleton.getPublicPositionedSketches(completionCallback);
	}
}