Hello,
I'm trying to create a finger paint application using surfaceview.
I have tried and able to paint on the screen using view but when I use
surfaceview
,I can't draw on the screen.
can anybody tell me how to solve this problem.
CODE
Main Activity
public class MainAct extends Activity {
DrawView drawView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set full screen view
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_NO_TITLE);
drawView = new DrawView(this);
setContentView(drawView);
drawView.requestFocus();
}
}
DrawView.class
public class DrawView extends SurfaceView implements
SurfaceHolder.Callback{
private static final String TAG = "DrawView";
List<Point> points = new ArrayList<Point>();
Paint paint = new Paint();
Thread mainLoop = null;
public DrawView(Context context) {
super(context);
getHolder().addCallback(this);
setFocusable(true);
setFocusableInTouchMode(true);
paint.setAntiAlias(true);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
}
public void doDraw(){
Canvas canvas = getHolder().lockCanvas();
canvas.drawColor(Color.BLACK);
canvas.drawCircle(50, 50, 50, paint);
for (Point point : points) {
canvas.drawCircle(point.x, point.y, 25, paint);
// Log.d(TAG, "Painting: "+point);
}
getHolder().unlockCanvasAndPost(canvas);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int
width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
Log.d(getClass().getName(), "surfaceCreated");
doDraw();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// if(event.getAction() != MotionEvent.ACTION_DOWN)
//return super.onTouchEvent(event);
Point point = new Point();
point.x = event.getX();
point.y = event.getY();
points.add(point);
Log.d(TAG, "point: " + point);
return super.onTouchEvent(event);
}
}
class Point {
float x, y;
@Override
public String toString() {
return x + ", " + y;
}
}
Thank you
Hassy
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