java - 获取 ListView 的背景颜色

Question

我需要多次更改 ListView 的背景颜色，但我不知道如何在单击 ListView 之前获取 ListView 的颜色。

我有这个代码:

if(colores.get(i).equals("0"))
                {
                    listView.getChildAt(i).setBackgroundColor(Color.GREEN);
                }
                else if(colores.get(i).equals("1"))
                {
                    listView.getChildAt(i).setBackgroundColor(Color.RED);
                }
                else if(colores.get(i).equals("2"))
                {
                    listView.getChildAt(i).setBackgroundColor(Color.YELLOW);
                }
                else
                {
                    listView.getChildAt(i).setBackgroundColor(Color.WHITE);
                }

我可以更改颜色，但当我单击 ListView 的一项时，我还需要更改颜色，但我不知道如何知道它之前的颜色。

有人可以帮助我吗？谢谢! :)

Answer 1

执行此操作:更改颜色然后创建处理程序。另外，将 View View 设置为最终 View View 。您可以根据子项的位置(即项目的位置)执行 if/else 语句或 switch 语句。

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
            view.setBackgroundColor(Color.RED); //on click change to red

            Handler handler = new Handler();
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    view.setBackgroundColor(Color.WHITE); //after click changes to white
                }
            };

            handler.postDelayed(runnable, 200); //change to white after 200ms
        }
    });

    //DO THIS BELOW FOR SPECIFIC ITEM IN LISTVIEW

private final String currentColor_P1; //current background color for item at position 1

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
            if (position == 1) {
                view.setBackgroundColor(Color.BLUE);
            } else if (position == 2) {
                view.setBackgroundColor(Color.YELLOW);
            } else {
                view.setBackgroundColor(Color.RED);
            }

            //OR check for position and check for the known color that you have set for that position
            if(position == 1 && currentColor_P1 == BLUE) {
                 view.setBackgroundColor(Color.YELLOW);

            } else if(position == 1 && currentColor_P1 == RED) {
                 view.setBackgroundColor(Color.YELLOW);
            }

            //Change color to whatever after clicked and after initial color change happened
            Handler handler = new Handler();
            Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    view.setBackgroundColor(Color.WHITE);

                    //or 
                    if(position == 1){
                         view.setBackgroundColor(Color.BLUE)
                         currentColor_P1 = "BLUE"; //now you set the current backgound for item at position 1 to "blue"
                    }



                }
            };

            handler.postDelayed(runnable, 200);
        }
    });