Unable to programmatically change width of horizontal progressbar

Question

I would like change the width of a Horizontal Progressbar programmatically (initial size is set in XML using RelativeLayout...but I would like to dynamically change it based on certain values).

I have tried setMinimumWidth(50) in my code, but that did not make a difference. I have also tried setting 'android:layout_width="wrap_content", but that did not work either.

Here is my XML:

<ProgressBar android:id="@+id/progress_horizontal"
     style="?android:attr/progressBarStyleHorizontal"
     android:layout_width="100dip"
     android:layout_height="wrap_content" 
/>

Thanks in advance for any assistance!

Answer 1

What layout is your ProgressBar in? This makes a difference as to how the layout_width and height are interpreted.

However, I think you are seeing a conflict between the View's width, and the layout_width. Each time the view is rendered, its preferred size is determined based on the minWidth, width, etc. set on it. The layout that the view sits in can then update the actual size to render based on the layout_width information. See How Android Draws Views and View size documentation for more info on the two phase process.

In your case, you have the layout_width set to 100, and the minimum width set to 50, so I would think it would always show 100.

Try setting the layout_width to wrap_content, and then updated the preferred width for the ProgressBar.

Answer 2

I would imagine the setmindwidth would be met when you give it an initial value of 100. the system would receognize it exceeds 50 and then continue to do as the rest of what it's told. try making the min width 150, set the xml for an initial value of 75 and in your onCreate fire off a Log.d("progbar", String.valueOf(myprogress.width));

disclaimer - written when in front of work computer without development environment for reference.