Android custom resource identifier in custom preference

Question

I have began to develop a Custom Preference:

<com.package.lib.android.preference.CustomPreference
    xmlns:customPreference="http://schemas.android.com/apk/src/com.package.lib.android.preference.CustomPreference"
    android:key="test"
    android:title="test"
    customPreference:minValue="4" />

The associated class:

public class CustomPreference extends DialogPreference {
    private Context mContext;
    private LayoutInflater mLayoutInflater;

    public CustomPreference(final Context context, final AttributeSet attrs) {
        super(context, attrs);

        mContext = context;
        mLayoutInflater = LayoutInflater.from(mContext);

        // how can I access customPreference:minValue?
    }
}

In my CustomPreference class I want to access customPreference:minValue. How is that possible?

Answer 1

I got it working.

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:customPreference="http://schemas.android.com/apk/res-auto" >

    <com.package.lib.android.preference.CustomPreference
        android:defaultValue="@integer/font_size_default_value"
        android:key="test"
        android:title="title"
        customPreference:minValue="@integer/font_size_min_value"
        customPreference:maxValue="@integer/font_size_max_value" />

Create a attrs.xml file in res/values folder with the following content:

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <declare-styleable name="CustomPreference">
        <attr name="minValue" format="integer" />
        <attr name="maxValue" format="integer" />
    </declare-styleable>

</resources>

In the preference class you can get the attributes using:

final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomPreference);

Log.i(TAG, String.valueOf(a.getInt(R.styleable.CustomPreference_minValue, 0)));
Log.i(TAG, String.valueOf(a.getInt(R.styleable.CustomPreference_maxValue, 100)));

a.recycle();