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package cgeo.geocaching.settings;
import org.eclipse.jdt.annotation.Nullable;
import android.content.Context;
import android.content.res.TypedArray;
import android.preference.Preference;
import android.util.AttributeSet;
/**
* Base class for preferences which evaluate their XML attributes for further processing.
*
*/
public abstract class AbstractAttributeBasedPrefence extends Preference {
public AbstractAttributeBasedPrefence(final Context context) {
super(context);
}
public AbstractAttributeBasedPrefence(final Context context, final AttributeSet attrs) {
super(context, attrs);
processAttributes(context, attrs, 0);
}
public AbstractAttributeBasedPrefence(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
processAttributes(context, attrs, defStyle);
}
private void processAttributes(final Context context, @Nullable final AttributeSet attrs, final int defStyle) {
if (attrs == null) {
return;
}
final TypedArray types = context.obtainStyledAttributes(attrs, getAttributeNames(),
defStyle, 0);
processAttributeValues(types);
types.recycle();
}
/**
* Evaluate the attributes which where requested in {@link AbstractAttributeBasedPrefence#getAttributeNames()}.
*
*/
protected abstract void processAttributeValues(TypedArray values);
/**
* @return the names of the attributes you want to read in your preference implementation
*/
protected abstract int[] getAttributeNames();
}
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