How can I change the size of a FrameLayout dynamically and it's childs get expanded too?
EDIT: So far, I got this but doesn't work:
public class ResizableArea extends FrameLayout {
private View child;
public ResizableArea(Context context) {
super(context);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getPointerCount() > 1){
Vector2D p1 = new Vector2D(event.getX(0), event.getY(0));
Vector2D p2 = new Vector2D(event.getX(1), event.getY(1));
float dist = p1.minus(p2).getSize();
resizeChildBy(dist);
}
return true;
}
private void resizeChildBy(float size) {
LayoutParams para开发者_运维问答ms = (LayoutParams) child.getLayoutParams();
params.height -= size;
params.width -= size;
child.setLayoutParams(params);
invalidate();
}
@Override
public void addView(View child) {
if (getChildCount() != 0)
throw new IllegalStateException("ResizableArea can only have one child attached!");
this.child = child;
super.addView(child);
}
}
Actually, this is the right answer:
public class ResizableArea extends FrameLayout {
private View child;
public ResizableArea(Context context) {
super(context);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getPointerCount() > 1){
Vector2D p1 = new Vector2D(event.getX(0), event.getY(0));
Vector2D p2 = new Vector2D(event.getX(1), event.getY(1));
float dist = p1.minus(p2).getSize();
if (lastDist == 0) {
lastDist = dist;
return true;
}
resizeChildsBy(lastDist - dist);
lastDist = dist;
}
return true;
}
private void resizeChildBy(float size) {
LayoutParams params = (LayoutParams) child.getLayoutParams();
params.height -= size;
params.width -= size;
child.setLayoutParams(params);
invalidate();
}
@Override
public void addView(View child) {
if (getChildCount() != 0)
throw new IllegalStateException("ResizableArea can only have one child attached!");
this.child = child;
super.addView(child);
}
}
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