search

AnderWeb / discreteSeekBar

Apache License 2.0
2.11k stars 401 forks source link

.NullPointerException on seekBar1.setOnProgressChangeListener(this)` #117

Closed altaf2892 closed 6 years ago

altaf2892 commented 6 years ago

i have implemented interface and set listener ,thogh app crashes with message nulll pointer exception ` private DiscreteSeekBar seekBar1; seekBar1 = (DiscreteSeekBar) findViewById(R.id.seekbar1);

below is how i have done implementation

implements DiscreteSeekBar.OnProgressChangeListener

seekBar1.setOnProgressChangeListener(this)`

see errror log Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.adw.library.widgets.discreteseekbar.DiscreteSeekBar.setOnProgressChangeListener(org.adw.library.widgets.discreteseekbar.DiscreteSeekBar$OnProgressChangeListener)' on a null object reference