Feature request: Support for Data Binding about android-ago

[Dev-iL]

@curioustechizen I think the right course of action consists of including the following class in the codebase, the presence of which should be sufficient for the binding to work correctly.

However, the version of gradle has to be updated (is that a bad thing...?) from 1.0.0 to at least 1.5.0-alpha1 as mentioned at the top of the Data Binding guide. The latest version of the android-gradle plugin at the time of writing is 2.0.0-beta2. I was trying to do this locally but ran into some difficulties. (Possibly because one can't have data-binding inside a apply plugin: 'com.android.library' -type module.)

BTW, not only the gradle plugin, but also the build tools and the target sdk should be updated (to API-23).

As per the example class in this link, a class like this should appear in the project:

package com.your.package;

import android.databinding.BindingAdapter;
import android.databinding.BindingMethod;
import android.databinding.BindingMethods;
import com.github.curioustechizen.ago.RelativeTimeTextView;

@BindingMethods({
        @BindingMethod(type = RelativeTimeTextView.class, attribute = "rttv:relative_time_prefix", method = "setPrefix"),
        @BindingMethod(type = RelativeTimeTextView.class, attribute = "rttv:relative_time_suffix", method = "setSuffix"),
})
public class RelativeTimeTextViewBindingAdapter {
    @BindingAdapter("rttv:reference_time")
    public static void setReferenceTime(RelativeTimeTextView view, long time) {
        view.setReferenceTime(time);
    }
}

(Note the custom namespace rttv:, which is an optional modification that makes sense to include). The XML is then:

<com.github.curioustechizen.ago.RelativeTimeTextView
    android:id="@+id/time_n_sender"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="14sp"
    rttv:relative_time_prefix='@{"by " + message.senderName + ", "}'
    rttv:reference_time='@{message.timestamp}'
    tools:textColor="@color/gray"
    tools:text="by Mike, 30/02/2016 22:22:10"/>

---

Note to users:
Adding the above anywhere in a project which uses this library should make it work with data-binding.

[curioustechizen]

The problem as you rightly pointed out is the way the custom attribute and its setter method have been named. The naming is incompatible with data binding.

I am considering deprecating the prefix and suffix attributes in favor of a more general mechanism (like a format specifier with positional parameters). See #15

Hence I don't see myself updating the library to include this functionality. However, if you take the time to implement it (simply adding a setRelativeTimePrefix method that just calls setPrefix) then I would be glad to accept pull requests.

For your question about the date format - see #19

[Dev-iL]

A complete example of RelativeTimeTextView with data-binding can be found here:
Dev-iL@37ab447

[curioustechizen]

@Dev-iL This is very helpful. Thanks!