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

@George Mount is correct, you have to add a handler in your layout xml which is defined in your Model or Handler class (whatever you call it).

Look at my answer for this question for a full fledged example:

Two way databinding with Android Databinding Library

Here's the example from that answer:

Example:

public class AmanteEditModel extends BaseObservable {

    private String senhaConfirm;

    @Bindable
    public String getSenhaConfirm() {
        return senhaConfirm;
    }

    public void setSenhaConfirm(String senhaConfirm) {
        this.senhaConfirm = senhaConfirm;
        notifyPropertyChanged(BR.senhaConfirm);
    }

    // Textwatcher Reference: http://developer.android.com/reference/android/text/TextWatcher.html
    public TextWatcher getMyEditTextWatcher() {
        return new TextWatcher() {

            public void afterTextChanged(Editable s) {
            }

            public void beforeTextChanged(CharSequence s, int start,
                                          int count, int after) {
            }

            public void onTextChanged(CharSequence s, int start,
                                  int before, int count) {
                // Important! Use the property setter, otherwhise the model won't be informed about the change.
                setSenhaConfirm(s);
            }
        };
    }

}

In your layout xml change EditText to this:

Watch for the namespace of addTextChangeListener. This method might not be available through the android: namespace, so I'm using app: here. You may also use bind: to make the binding more clear.

So don't miss to add

xmlns:app="http://schemas.android.com/apk/res-auto"

or

xmlns:bind="http://schemas.android.com/apk/res-auto"

to your XML namespaces.

This solution works for all input controls, custom included, given you provide the correct Listeners in your model.

TextWatcher Reference