removeViewInLayout

/**
     * Removes a view during layout. This is useful if in your onLayout() method,
     * you need to remove more views.
     *
     * <p><strong>Note:</strong> do not invoke this method from
     * {@link #draw(android.graphics.Canvas)}, {@link #onDraw(android.graphics.Canvas)},
     * {@link #dispatchDraw(android.graphics.Canvas)} or any related method.</p>
     * 
     * @param view the view to remove from the group
     */
    public void removeViewInLayout(View view) {
        removeViewInternal(view);
    }


    /**
     * {@inheritDoc}
     * 
     * <p><strong>Note:</strong> do not invoke this method from
     * {@link #draw(android.graphics.Canvas)}, {@link #onDraw(android.graphics.Canvas)},
     * {@link #dispatchDraw(android.graphics.Canvas)} or any related method.</p>
     */
    public void removeView(View view) {
        removeViewInternal(view);
        requestLayout();
        invalidate(true);
    }

同样的还有 removeAllViewsInLayout() 和 removeAllViews(),

简单test了一下， 在removeAllViewsInLayout()之后， requestLayout() 并不能让view刷新，必须 invalidate(), 而这就是 removeAllViews()办的事情,

如果只invalidate(), 不requestLayout()的话， view的尺寸不会因为子view的remove()而变化(view是wrap_content的)

public void removeAllViews() {
        removeAllViewsInLayout();
        requestLayout();
        invalidate(true);
    }