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String s=var.getSelectedItem().toString(); //Get Value from Spinner
var.setSelection(index);          //Set Value to spinner

//Get Previously selected value and Set it again

for (int i=0;i<var.getCount();i++){
    if (var.getItemAtPosition(i).toString().equalsIgnoreCase(previousValue))
        index=i;
    }
var.setSelection(index);

var.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        seektext.setText(""+progress);
        //For setting TextView for showing percentage as it changes
    }

    @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

    }
    
});

//To set value
var.setProgress(Value);