Is there any way to create a circular button in android without just setting drawable shape file as background? Because I want to set button color programmatically and by setting drawable shape file as background it doesn't work. I also used Floating action Button but when tried to set color swatch as background it didnt work.

```
`public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    FloatingActionButton fab1, fab2, fab3, fab4, fab5,fab6;

    ImageView imgV;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fab1 = (FloatingActionButton) findViewById(R.id.bt1);
        fab2 = (FloatingActionButton) findViewById(R.id.bt2);
        fab3 = (FloatingActionButton) findViewById(R.id.bt3);
        fab4 = (FloatingActionButton) findViewById(R.id.bt4);
        fab5 = (FloatingActionButton) findViewById(R.id.bt5);
        fab6 = (FloatingActionButton) findViewById(R.id.bt6);
        imgV = (ImageView) findViewById(R.id.imageView);

        fab1.setOnClickListener(this);
        fab2.setOnClickListener(this);
        fab3.setOnClickListener(this);
        fab4.setOnClickListener(this);
        fab5.setOnClickListener(this);

        Bitmap bitmap = ((BitmapDrawable) imgV.getDrawable()).getBitmap();
        if (bitmap != null) {

            Palette.from(bitmap).maximumColorCount(10).generate(new Palette.PaletteAsyncListener() {
                @Override
                public void onGenerated(Palette palette) {

                    setViewSwatch(fab1, palette.getVibrantSwatch(), "Vibrant");
                    setViewSwatch(fab2, palette.getDarkVibrantSwatch(), "Dark Vibrant");
                    setViewSwatch(fab3, palette.getLightVibrantSwatch(), "Light Vibrant");
                    setViewSwatch(fab4, palette.getMutedSwatch(), "Muted");
                    setViewSwatch(fab5, palette.getLightMutedSwatch(), "Light Muted");

                }

            });

        }

    }

    private void setViewSwatch(FloatingActionButton fab, Palette.Swatch vibrantSwatch, String vibrant) {
        if (vibrantSwatch != null) {
            fab.setBackgroundColor(vibrantSwatch.getRgb());

        }
    }
`

```