偏好片段中的按钮

Question

I need to add a button into a Preference Fragment Layout. I can succesfully get the button in the Preferences layout, but I cannot capture the event of it being clicked.

all other preferences are captured in the onSharedPreferenceChanged Callback, but the button click is not.

What is the best way to add a callback to the button, or have it return it's value in the onSharedPreferenceChanged callback?

I've tried almost all examples I could find on Stackoverflow, but most are designed with a preferenceActivity in mind, not a fragment.

One solution I tried did fire a callback event, but only when that callback was in the host Activity!

Fragment specific help on this appreciated.

Answer 1

This should work in your fragment:

    Button prefBtn = ((Button) view.findViewById(R.id.prefBtn));
    prefBtn.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v){
            // Your code here
        }
    });

EDIT
You also need something like this in your fragment layout:

    <Button
        android:id="@+id/prefBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

Answer 2

For the whole item click:

preferenceManager.findPreference<Preference>("your_key")?.onPreferenceClickListener = Preference.OnPreferenceClickListener {
    Timber.d("click item")
    return@OnPreferenceClickListener false
}

For only the button: u need a custom preference.

class FooterPreference(context: Context, attrs: AttributeSet): Preference(context, attrs) {

    override fun onBindViewHolder(holder: PreferenceViewHolder?) {
        super.onBindViewHolder(holder)
        holder?.itemView?.findViewById<Button>(R.id.btn)?.setOnClickListener {
            Timber.d("click btn")
        }
    }
}

<packageName.FooterPreference
        app:layout="@layout/layout_preference_footer" />