android - custom drag and drop -


i begginer android develpoer , tring build small soiltare game. dragging cards implemented custom viewgroup "dragcontainer" 1 of questions here. problem when drag linear layout. linear layout holds cards - margin (to overlap cards) when start drag dragged "shadow" layout without margin. here example

this start of activity, left linear layout 2 children , right

when start drag see

as can see dragged "shadow" bigger(without - margin)

this code custom drag container(only stuff matters):

    public boolean startdragchild(view child, clipdata data,         object mylocalstate, int flags) {     setdragtarget(child);     return child.startdrag(data, new emptydragshadowbuilder(child),             mylocalstate, flags); }  private void setdragtarget(view v) {     target = v;     onsetdragtarget(v); }  /**  * similar constructor of dragshadowbuilder  *   * @param v  */ protected void onsetdragtarget(view v) {  }     @override protected void dispatchdraw(canvas canvas) {      super.dispatchdraw(canvas);     if (mondrag && target != null) {         canvas.save();         drawdragshadow(canvas);         canvas.restore();     } }  protected void drawdragshadow(canvas canvas) {     int h = target.getheight();     int w = target.getwidth();     canvas.translate(mdragx - w / 2, mdragy - h / 2);     target.draw(canvas); }

of course, can use standart views purpose irrational. better use surfaceview (or if know opengl glsurfaceview).


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