Can I databind a ProgressBar in Android?

Question

Is it possible to use data-binding for a SeekBar or ProgressBar in Android? I have this data element:

Answer 1

In case it helps someone, this question comes up under search a lot, this can now be done using two-way databinding. I use two bindable values below, I tend to prefer no display logic in the XML itself, but I suspect it can work with just one as well.

Create the bindable values in your ViewModel, one for the SeekBar (seekValue) and one for the TextView (seekDisplay)

int mSeekValue;
int mSeekDisplay;

@Bindable
public int getSeekValue() {
    return mSeekValue;
}

public void setSeekValue(int progress) {
    mSeekValue = progress;
    notifyPropertyChanged(BR.seekValue);
    setSeekDisplay(progress);
}

@Bindable
public String getSeekDisplay() {
    return Integer.toString(mSeekDisplay);
}

public void setSeekDisplay(int progress) {
    mSeekDisplay = progress;
    notifyPropertyChanged(BR.seekDisplay);
}

Now you can bind these to the Widgets.

The main point to note is that you are using two-way databinding on the SeekBar using @={viewModel.seekValue}, which will call your setSeekValue(...) method.

One this is called, it will update your TextView by calling setSeekDisplay(...)