[Android] 안드로이드 스튜디오 SurfaceView(서페이스뷰) 활용

xml파일 하나와 세개의 자바파일로 구성

 

xml파일

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<com.example.a31customview.CustomView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" >

</com.example.a31customview.CustomView>

</android.support.constraint.ConstraintLayout>

 

 

자바파일1

package com.example.surfaceview;

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Window;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(new GameView(this));
	}
}

자바파일2

package com.example.surfaceview;

import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class Ball {
	private Drawable image = null;
	private Point point = new Point();
	private Point size = new Point();
	private Point delta;

	public Drawable getImage() {
		return image;
	}

	public void setImage(Drawable image) {
		this.image = image;
	}

	public Point getPoint() {
		return point;
	}

	public void setPoint(Point point) {
		this.point = point;
	}

	public Point getSize() {
		return size;
	}

	public void setSize(Point size) {
		this.size = size;
	}

	public void draw(Canvas canvas) {
		image.setBounds(point.x, point.y, point.x + size.x, point.y + size.y);
		image.draw(canvas);
	}

	public void setDelta(int dx, int dy) {
		delta = new Point(dx, dy);
	}

	public void move(Rect surfaceFrame) {
// X axis collision
		if (point.x + delta.x < 0 || point.x + delta.x + size.x > surfaceFrame.right)
			delta.x *= -1;
		else
			point.x += delta.x;

// Y axis collision
		if (point.y + delta.y < 0 || point.y + delta.y + size.y > surfaceFrame.bottom)
			delta.y *= -1;
		else
			point.y += delta.y;
	}

}

자바파일 3

package com.example.surfaceview;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class GameView extends SurfaceView implements SurfaceHolder.Callback {
	private static final String TAG = GameView.class.getName();
	private final SurfaceHolder holder;
	private boolean goOnPlay = true;
	private Thread renderer = new Thread() {
		public void run() {
			super.run();

			Drawable bg = getResources().getDrawable(R.drawable.billiards);
			bg.setBounds(holder.getSurfaceFrame());

			ball.setDelta(15, 30);

			while (goOnPlay)

			{
				ball.move(holder.getSurfaceFrame());

				Canvas canvas = holder.lockCanvas();

				bg.draw(canvas);
				ball.draw(canvas);

				holder.unlockCanvasAndPost(canvas);
			}
		}

	};

	private Ball ball;

	public GameView(Context context) {
		super(context);

		Log.i(TAG, "GameView create");
		holder = getHolder();
		holder.addCallback(this);
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		renderer.start();
		ball = new Ball();
		ball.setImage(getResources().getDrawable(R.drawable.red_ball));
		ball.setSize(new Point(100, 100));
		ball.setPoint(new Point(0, 0));
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		goOnPlay = false; // kill thread

	}
}

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