IntEditTextPreference.java

package net.i2p.android.preferences.util;

import android.content.Context;
import android.support.v7.preference.EditTextPreference;
import android.util.AttributeSet;

public class IntEditTextPreference extends EditTextPreference {

    public IntEditTextPreference(Context context) {
        super(context);
    }

    public IntEditTextPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public IntEditTextPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public CharSequence getSummary() {
        String summary = (String) super.getSummary();
        if (summary == null)
            summary = "%s";
        return String.format(summary, getText());
    }

    @Override
    protected String getPersistedString(String defaultReturnValue) {
        if(getSharedPreferences().contains(getKey())) {
            int intValue = getPersistedInt(0);
            return String.valueOf(intValue);
        } else {
            return defaultReturnValue;
        }
    }

    @Override
    protected boolean persistString(String value) {
        return value != null && persistInt(Integer.valueOf(value));
    }
}