메인 소스
public class CanvasLissajous extends Activity {
CanvasView mCanvasView;
private TextView mTextView;
Random mRandom;
//int A=13;
//int B=19;
//private int A=10000;
//private int B=20000;
Timer mTimer = new Timer();
TimerTask mTimerTask = new TimerTask() {
@Override
public void run() {
// TODO Auto-generated method stub
mCanvasView.A = mRandom.nextInt(Def.RANGE);
if (mCanvasView.A == 0) mCanvasView.A =1;
mCanvasView.B = mRandom.nextInt(Def.RANGE);
if ( mCanvasView.B == 0) mCanvasView.B =1 ;
/*
mCanvasView.A++;
if ( mCanvasView.A > 500) mCanvasView.A=1 ;
mCanvasView.B++;
if ( mCanvasView.B > 500) mCanvasView.B=1;
*/
}
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
//CanvasView
//mCanvasView = new CanvasView(this);
//setContentView(mCanvasView ); //R.layout.main);
setContentView(R.layout.main);
mCanvasView = (CanvasView)findViewById(R.id.canvasview);
mTextView = (TextView)findViewById(R.id.textview);
mCanvasView.setTextView(mTextView);
mTimer.schedule(mTimerTask, Def.INTERVAL, Def.INTERVAL);
mRandom = new Random();
}
}
CanvasView 소스
public class CanvasView extends View {
Context mContext;
private TextView mTextView;
public CanvasView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
// TODO Auto-generated constructor stub
mHandler.sendEmptyMessageDelayed(0, Def.INTERVAL);
}
int w,h;
int A=1,B=1;
Canvas mCanvas;
private int CenterX,CenterY;
/*
public CanvasView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
*/
Handler mHandler = new Handler() {
@Override
public void handleMessage( Message msg ) {
// TODO Auto-generated method stub
//super.handleMessage(msg);
drawCurve(mCanvas);
invalidate();
mHandler.sendEmptyMessageDelayed(0, Def.INTERVAL);
}
};
void drawCurve(Canvas canvas) {
w = getWidth();
h = getHeight();
CenterX = w/2;
CenterY = h/2;
int x1 = CenterX*2;
int y1 = CenterY;
Paint paint = new Paint();
canvas.drawColor(Color.WHITE);
paint.setColor(Color.BLUE);
paint.setTextSize(24);
//canvas.drawText("A:"+ A + " B: "+B, 10, 30, paint);
getTextView().setText("A:"+ A + " B: "+B);
for(float r=0; r<= Math.PI*3; r += 0.01) {
int x2 = (int)(CenterX + Math.cos(r*A) * CenterX );
int y2 = (int)(CenterY - Math.sin(r*B) * CenterY );
canvas.drawLine(x1, y1, x2, y2, paint);
//try { Thread.sleep(100); } catch (InterruptedException e) {;}
x1 = x2 ;
y1 = y2 ;
}
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
mCanvas = canvas;
drawCurve(canvas);
//super.onDraw(canvas);
}
public void setTextView(TextView mTextView) {
this.mTextView = mTextView;
}
public TextView getTextView() {
return mTextView;
}
}
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