java - Android - 从 onCreate 重新启动部分

Question

在我的程序中，我正在创建用列表中的随机颜色填充的形状。颜色在 onCreate 中设置。我不希望它有确定的颜色，而是多次改变颜色。如何“重新启动”onCreate 部分，以便再次分配颜色？

public class MainActivity extends Activity implements OnGestureListener
{       
            private Paint paint = new Paint();


            @Override
            protected void onCreate(Bundle savedInstanceState)
            {   
                super.onCreate(savedInstanceState);                       
                setContentView(R.layout.activity_main);                           
                Canvas canvas = new Canvas(bg); 

                List<Integer> numbers = Arrays.asList(Color.RED, Color.BLUE, Color.GREEN, Color.YELLOW);
                Collections.shuffle(numbers);

            }
}

Answer 1

这里有技巧，调用这个方法

loadColors();

在 oncreate 和任何你想要的地方

public class MainActivity extends Activity implements OnGestureListener
{       
            private Paint paint = new Paint();


            @Override
            protected void onCreate(Bundle savedInstanceState)
            {   
                super.onCreate(savedInstanceState);                       
                setContentView(R.layout.activity_main);                           
                Canvas canvas = new Canvas(bg); 

                loadColors();

            }



         private void loadColors(){
            List<Integer> numbers = Arrays.asList(Color.RED, Color.BLUE,                      
Color.GREEN, Color.YELLOW);
                 Collections.shuffle(numbers);
    }
    }