libGDX sample

GdxMain.java

package name.taoka.ugeee.inputdemo;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Buttons;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class GdxMain extends ApplicationAdapter implements InputProcessor {
	private SpriteBatch batch;
	private Texture texture;
	private Sprite sprite;
	private float posX, posY;

	@Override
	public void create() {
		float w = Gdx.graphics.getWidth();
		float h = Gdx.graphics.getHeight();
		batch = new SpriteBatch();
		texture = new Texture(Gdx.files.internal("img01.png"));
		sprite = new Sprite(texture);
		posX = w / 2 - sprite.getWidth() / 2;
		posY = h / 2 - sprite.getHeight() / 2;
		sprite.setPosition(posX, posY);

		Gdx.input.setInputProcessor(this);
	}

	@Override
	public void dispose() {
		batch.dispose();
		texture.dispose();
	}

	@Override
	public void render() {
		Gdx.gl.glClearColor(1, 1, 1, 1);
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

		sprite.setPosition(posX, posY);
		batch.begin();
		sprite.draw(batch);
		batch.end();
	}

	@Override
	public boolean keyDown(int keycode) {
		float moveAmount = 1.0f;
		if (Gdx.input.isKeyPressed(Keys.CONTROL_LEFT)) {
			moveAmount = 10.0f;
		}
		if (keycode == Keys.LEFT) {
			posX -= moveAmount;
		}
		if (keycode == Keys.RIGHT) {
			posX += moveAmount;
		}
		return true;
	}

	@Override
	public boolean keyUp(int keycode) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean keyTyped(char character) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean touchDown(int screenX, int screenY, int pointer, int button) {
		if (button == Buttons.LEFT) {
			posX = screenX - sprite.getWidth() / 2;
			posY = Gdx.graphics.getHeight() - screenY - sprite.getHeight() / 2;
		}
		if (button == Buttons.RIGHT) {
			posX = Gdx.graphics.getWidth() / 2 - sprite.getWidth() / 2;
			posY = Gdx.graphics.getHeight() / 2 - sprite.getHeight() / 2;
		}
		return false;
	}

	@Override
	public boolean touchUp(int screenX, int screenY, int pointer, int button) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean touchDragged(int screenX, int screenY, int pointer) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean mouseMoved(int screenX, int screenY) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean scrolled(int amount) {
		// TODO Auto-generated method stub
		return false;
	}
}