I have solve my problem, but i don't know how to do to keep my draw
when i draw again. The onDraw clear sreen to draw again.
Do you know how I can do?
thanks
On 26 oct, 10:55, Nightwolf <mikh...@gmail.com> wrote:
> Try adding invalidate() in your translate() method instead of
> this.draw(_myCanvas);.
>
> On Oct 25, 2:37 pm, "stephane.cast...@gmail.com"
>
> <stephane.cast...@gmail.com> wrote:
> > Hi!
> > I have a problem with one of my app. I try to make a paint application
> > but nothing isdrawon the screen (except the first circle which is
> >drawon the launch).
> > The log Cat seems to be correct and i get the right x/y coordinates. I
> > think i do something wrong on the ondraw.
>
> > do you see my problem?
>
> > Thanks.
>
> > this is my code :
>
> > public class Main extends Activity {
> > /** Called when the activity is first created. */
>
> > private TableLayout myView;
>
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> > Log.i("onCreate", " Start");
> > setContentView(R.layout.main);
> > myView= (TableLayout)findViewById(R.id.TableLayout01);
> > myView.addView(new PaintView(this));
> > }
>
> > }
>
> > public class PaintView extends View implements OnTouchListener {
>
> > private float _x, _y;
> > private int _taille;
> > private Canvas _myCanvas;
> > private Paint _paint = new Paint(Paint.ANTI_ALIAS_FLAG);
> > public PaintView(Context context){
> > super(context);
> > Log.i("Info", "_paintview Constructor 1");
> > //this.setFocusableInTouchMode(true);
> > _x=20;
> > _y=20;
> > _taille = 10;
> > _paint.setColor(Color.RED);
> > }
>
> > public PaintView(Context parent, float x, float y, int i) {
> > super(parent);
> > Log.i("Info", "_paintview Constructor");
> > _x=x; _y=y; _taille = i;
> > _paint.setColor(Color.RED);
>
> > }
>
> > @Override
> > protected void onDraw(Canvas canvas) {
> > Log.i("Info ","onDraw start");
> > try{
> > // make the entire canvas white
> > canvas.drawColor(Color.WHITE);
>
> > canvas.drawCircle(_x, _y, _taille, _paint);
> > super.onDraw(canvas);
>
> > Log.i("Info ","x="+_x+" y="+_y);
> > _myCanvas=canvas;
> > }
> > catch(Exception e)
> > {
> > Log.i("ERROR", "onDraw : " + e.getMessage());
> > }
> > }
>
> > public void translate(float x, float y){
> > try{
> > _x=x;
> > _y=y;
> > this.draw(_myCanvas);
> > }
> > catch (Exception e){
> > Log.i("ERROR", " "+e.getMessage());
> > }
> > }
>
> > @Override
> > public boolean onTouchEvent(MotionEvent evt){
> > translate(evt.getX(), evt.getY());
> > return true;
> > }
>
> > @Override
> > public booleanonTouch(View v, MotionEvent evt) {
> > translate(evt.getX(), evt.getY());
> > return false;
> > }
>
> > }
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