Wsrtjtyk

Why does setMargins() not work on buttons?

Screen

public class MainActivity extends AppCompatActivity {



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);



    GridLayout gridLayout = new GridLayout(this);

        gridLayout.setRowCount(5);

        gridLayout.setColumnCount(7);

    setContentView(gridLayout);



    FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(100,100);

        layoutParams.setMargins(10,10,10,10);



    for(int i=1;i<31;i++) {

        Button button = new Button(this);

            button.setText(String.valueOf(i));

            button.setTextSize(18);

            button.setBackgroundResource(R.drawable.button);

        gridLayout.addView(button,layoutParams);

    }







}

}

if you use ConstraintLayout in your layout you should make sure your button had chain from that side you want have margin
example

<Button

    android:id="@+id/btn"

    android:layout_marginBottom="8dp"

    app:layout_constraintBottom_toBottomOf="parent"

 />

if you dont write

app:layout_constraintBottom_toBottomOf="parent"

in your Button's tag you cant set margin from bottom
and otherside like this.