How to place views in a specific location (x, y coordinates)

Question

I have a problem with placing my views (my class extends View) in a specific location. I have designed a game that treats the screen as a net of grids. I get from the user x and y coordinates of a specific view (I have different types of views).

My first mission is to set the correct view in its place. How can I do it? I am using RelativeLayout for the screen.

P.S. I don't want to use AbsoluteLayout params because it was truncated.

Answer 1

This is not the best way to achieve it, but it's a solution...

Create a class that extends your parent ViewGroup, say RelativeLayout or some other ViewGroups. Find your own view in overriding onFinishInflate().

Override the onLayout() method and manually layout your own view after calling super.onLayout().

Finally, every time you want to refresh the location of your own view, just call requestLayout().

Here is a sample below:

private AwesomeView mMyView;
private int mYourDesiredX;
private int mYourDesiredY;

@Override
public void onFinishInflate() {
    super.onFinishInflate();
    if (mMyView == null) {
        mMyView = (AwesomeView)findViewById();
    }
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    super.onLayout(changed, l, t, r, b);
    mMyView.layout(mYourDesiredX,
            mYourDesiredY,
            mYourDesiredX + mMyView.getWidth(),
            mYourDesiredY + mMyView.getHeight());
}

But this is not an efficient solution.

If you are making games, try SurfaceView or even GLSurfaceView and draw the objects by your own with Canvas.