<Button android:id="@+id/saveButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="bottom" android:text="@string/saveButton" android:visibility="invisible" />
invisible visible gone
Button b = (Button) findViewById(R.id.saveButton); b.setVisibility(View.INVISIBLE);
View.VISIBLE View.INVISIBLE View.GONE