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 is draw on the screen (except the first circle which is
> draw on 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 boolean onTouch(View v, MotionEvent evt) {
> translate(evt.getX(), evt.getY());
> return false;
> }
>
>
>
> }
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