Custom switch with smooth scrolling in android using seek bar.

you require to create first one drawable xml file witch specify your switch background. 

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

<rotate xmlns:android="http://schemas.android.com/apk/res/android"

android:fromDegrees="0"

android:interpolator="@android:anim/linear_interpolator"

android:pivotX="50%"

android:pivotY="50%"

android:toDegrees="360" >

<shape

android:innerRadiusRatio="3"

android:shape="ring"

android:thicknessRatio="8"

android:useLevel="false" >

<size

android:height="48dip"

android:width="48dip" />

<gradient

android:angle="270"

android:centerColor="#806CA5BC"

android:centerX="0.50"

android:centerY="0.50"

android:endColor="#66C2E0"

android:startColor="#517C8D"

android:type="sweep"

android:useLevel="false" />

</shape>

</rotate> 

After Create this drawable file you require to create layout for switch.

<RelativeLayout

                    android:id="@+id/layEmailsub1"

                    android:layout_width="fill_parent"

                    android:layout_height="wrap_content">

                    <RelativeLayout

                        android:id="@+id/laySwitchEmail"

                        android:layout_width="wrap_content"

                        android:layout_height="wrap_content"

                        android:layout_alignParentRight="true"

                        android:background="@drawable/switch_off_"></RelativeLayout>  //one layout with you switch initial background

                    <SeekBar //create seek bar require for drags thumb

                        android:id="@+id/switchEmail"

                        android:layout_width="wrap_content"

                        android:layout_height="wrap_content"

                        android:layout_alignBottom="@id/laySwitchEmail"

                        android:layout_alignLeft="@id/laySwitchEmail"

                        android:layout_alignRight="@id/laySwitchEmail"

                        android:layout_alignTop="@id/laySwitchEmail"

                        android:layout_centerInParent="true"

                        android:indeterminate="false"

                        android:max="100"

                        android:paddingLeft="15dp"

                        android:paddingRight="15dp"

                        android:progress="0"

                        android:progressDrawable="@drawable/styled_progress_swich"  // specify drawable file witch is initialy we created

                        android:thumb="@drawable/white_circle" /> //hear specify thumb of switch

                </RelativeLayout>

And After put this code in your class file

//create following variable 

SeekBar switchEmail;

RelativeLayout laySwitchEmail;

Boolean alertScribe = null;

//initialise above variable

switchEmail = (SeekBar) findViewById(R.id.switchEmail);

laySwitchEmail = (RelativeLayout) findViewById(R.id.laySwitchEmail);

//after all this set one switchEmail seek bar change listener like following 

switchEmail.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

int prograssvalue = 0;

@Override

public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

prograssvalue = progress;

}

@Override

public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override

public void onStopTrackingTouch(SeekBar seekBar) {

if (prograssvalue <= 50) {

swichOpt(1, 0);

} else {

swichOpt(1, 1);

}

}

});

// method for perform switch operation enable or disable

private void swichOpt(int switchid, int val) {

switch (switchid) {

case 1:

if (val == 0) {

switchEmail.setProgress(0);

laySwitchEmail.setBackgroundResource(R.drawable.switch_off_);

} else {

switchEmail.setProgress(100);

laySwitchEmail.setBackgroundResource(R.drawable.switch_on_);

}

break;

}

}