Datepicker分隔符颜色根据应用程序主题更改

Question

我知道这个问题已被提出，甚至已经回答，但我无法从提供的解决方案中找到很多。我试图关注this教程，但我无法弄明白我需要做什么。我已经下载了Android-DatePicker库并更改了drawable文件夹中的图片，但之后我无法执行所需的步骤。

我有示例活动：

import java.util.Calendar;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.Button;

import net.simonvt.datepicker.DatePickerDialog;
import net.simonvt.datepicker.DatePickerDialog.OnDateSetListener;
import net.simonvt.datepicker.DatePicker;

public class SettingsActivity extends FragmentActivity {

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_settings_portrait);

        Button pickDate = (Button) findViewById(R.id.button1);
        pickDate.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v){

                Calendar c = Calendar.getInstance();
                int mYear = c.get(Calendar.YEAR);
                int mMonth = c.get(Calendar.MONTH);
                int mDay = c.get(Calendar.DAY_OF_MONTH);
                System.out.println("the selected " + mDay);
                DatePickerDialog dialog = new DatePickerDialog(SettingsActivity.this, new mDateSetListener(), mYear, mMonth, mDay);
                dialog.show();

            }

        });
    };

    class mDateSetListener implements DatePickerDialog.OnDateSetListener {

        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                int dayOfMonth) {
            // TODO Auto-generated method stub
            // getCalender();
            int mYear = year;
            int mMonth = monthOfYear;
            int mDay = dayOfMonth;
//            v.setText(new StringBuilder()
//                    // Month is 0 based so add 1
//                    .append(mMonth + 1).append("/").append(mDay).append("/")
//                    .append(mYear).append(" "));
//            System.out.println(v.getText().toString());


        }
    }

}

我想要做的是，我想在用户点击pickDate按钮时打开日期选择器。请告诉我在此之后要完成目标的步骤。我希望分隔符颜色为#009945。