Android

[CustomView] 4. Thread 이용하여 그림 움직이기

인뜨라야 2010. 8. 12. 12:46
#Thread 이용하여 그림 움직이기

[RobotView.java]
package net.itisn.test;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

public class RobotView extends View implements Runnable {
    private final static int STEP = 10;
    private Drawable image;
    private int viewWidth, viewHeight;
    private int imageWidth, imageHeight;
    private int x, y;

    public RobotView(Context context, AttributeSet attrs) {
    	super(context, attrs);
    	// TODO Auto-generated constructor stub
    	image = this.getResources().getDrawable(R.drawable.su);

    	Thread thread = new Thread(this);
    	thread.start();
    }

    @Override
    protected void onDraw(Canvas canvas) {
    	// TODO Auto-generated method stub
    	image.setBounds(x, y, x + imageWidth, y + imageHeight);
    	image.draw(canvas);

    	super.onDraw(canvas);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    	// TODO Auto-generated method stub
    	viewWidth = this.getWidth();
    	viewHeight = this.getHeight();

    	imageWidth = image.getIntrinsicWidth();
    	imageHeight = image.getIntrinsicHeight();

    	x = viewWidth / 2 - imageWidth / 2;
    	y = viewHeight / 2 - imageHeight / 2;

    	super.onSizeChanged(w, h, oldw, oldh);
    }

    @Override
    public void run() {
    	// TODO Auto-generated method stub
    	for (; ;) {
    		try {
    			Thread.sleep(500);
    			y = Math.min(viewHeight - imageHeight, y + STEP);
    			this.postInvalidate();
    		} catch(InterruptedException e) {
    			e.printStackTrace();
    		}
    	}
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
    	// TODO Auto-generated method stub
    	x = (int)event.getX();
    	y = (int)event.getY();
    	this.invalidate();

    	return super.onTouchEvent(event);
    }
}

[main.xml]
<?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"
    >

<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />

<net.itisn.test.RobotView
    android:id="@+id/su"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    />

</LinearLayout>



sleep을 쓸 경우 InterrupedException 예외 발생
따라서 try catch 문을 반드시 써주어야 함

static 클래스는 new 연산자 없이 바로 사용가능. 
Math.min
System.out.println(); 
원래 System sys = new System();
sys.out.println()

postInvalidate() 화면을 새로 그림..

ontouchEvent
x = (int)event.getx();
y = (int)event.gety();

this.invalidate();

return true;

- END
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