Hope this would help.
<SeekBar
android:id="@+id/seekBar1"
android:progressDrawable="@android:color/background_dark"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:progress="50"
android:max="100" />
And use int progress = mSeekBar1.getProgress()-50;
to get the progress.