如何编程创建ColorStateList?(How do I create ColorStateLi

2019-07-22 07:50发布

我想创建一个ColorStateList编程方式使用这样的:

ColorStateList stateList = new ColorStateList(states, colors); 

但我不知道是两个参数。

按照文档:

 public ColorStateList (int[][] states, int[] colors) 

在API级别1

创建返回从状态到颜色指定映射ColorStateList。

可有人请解释我如何建立呢?

什么是二维数组状态的含义?

Answer 1:

见http://developer.android.com/reference/android/R.attr.html#state_above_anchor可用状态的列表。

如果你想设置颜色为残疾人,重点不突出,未选中状态等,只是否定了规定:

int[][] states = new int[][] {
    new int[] { android.R.attr.state_enabled}, // enabled
    new int[] {-android.R.attr.state_enabled}, // disabled
    new int[] {-android.R.attr.state_checked}, // unchecked
    new int[] { android.R.attr.state_pressed}  // pressed
};

int[] colors = new int[] {
    Color.BLACK,
    Color.RED,
    Color.GREEN,
    Color.BLUE
};

ColorStateList myList = new ColorStateList(states, colors);


Answer 2:

第一维是状态集合,第二IST状态设定本身的阵列。 的颜色阵列列出的颜色为每个匹配状态集合,因此颜色阵列的长度必须匹配状态阵列的第一维度(或当状态是“已使用”它会崩溃)。 这里和示例:

ColorStateList myColorStateList = new ColorStateList(
                        new int[][]{
                                new int[]{android.R.attr.state_pressed}, //1
                                new int[]{android.R.attr.state_focused}, //2
                                new int[]{android.R.attr.state_focused, android.R.attr.state_pressed} //3
                        },
                        new int[] {
                            Color.RED, //1
                            Color.GREEN, //2
                            Color.BLUE //3
                        }
                    );

希望这可以帮助。

编辑例子:一个xml颜色状态列表,如:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:color="@color/white"/>
    <item android:color="@color/black"/>
</selector>

是这样的

ColorStateList myColorStateList = new ColorStateList(
        new int[][]{
                new int[]{android.R.attr.state_pressed},
                new int[]{}
        },
        new int[] {
                context.getResources().getColor(R.color.white),
                context.getResources().getColor(R.color.black)
        }
);


Answer 3:

有时,这将是不够的:

int colorInt = getResources().getColor(R.color.ColorVerificaLunes);
ColorStateList csl = ColorStateList.valueOf(colorInt);


Answer 4:

遗憾的是没有解决方案为我工作。

  1. 如果你没有在第一次设置按下状态也不会检测到它。
  2. 如果设置它,那么你需要定义空状态添加默认的颜色
ColorStateList themeColorStateList = new ColorStateList(
        new int[][]{
                new int[]{android.R.attr.state_pressed},
                new int[]{android.R.attr.state_enabled},
                new int[]{android.R.attr.state_focused, android.R.attr.state_pressed},
                new int[]{-android.R.attr.state_enabled},
                new int[]{} // this should be empty to make default color as we want
        },
        new int[]{
                pressedFontColor,
                defaultFontColor,
                pressedFontColor,
                disabledFontColor,
                defaultFontColor
        }
);

这是从源代码构造函数:

/**
 * Creates a ColorStateList that returns the specified mapping from
 * states to colors.
 */
public ColorStateList(int[][] states, int[] colors) {
    mStateSpecs = states;
    mColors = colors;

    if (states.length > 0) {
        mDefaultColor = colors[0];

        for (int i = 0; i < states.length; i++) {
            if (states[i].length == 0) {
                mDefaultColor = colors[i];
            }
        }
    }
}


Answer 5:

我的建设者类创建ColorStateList

private class ColorStateListBuilder {
    List<Integer> colors = new ArrayList<>();
    List<int[]> states = new ArrayList<>();

    public ColorStateListBuilder addState(int[] state, int color) {
        states.add(state);
        colors.add(color);
        return this;
    }

    public ColorStateList build() {
        return new ColorStateList(convertToTwoDimensionalIntArray(states),
                convertToIntArray(colors));
    }

    private int[][] convertToTwoDimensionalIntArray(List<int[]> integers) {
        int[][] result = new int[integers.size()][1];
        Iterator<int[]> iterator = integers.iterator();
        for (int i = 0; iterator.hasNext(); i++) {
            result[i] = iterator.next();
        }
        return result;
    }

    private int[] convertToIntArray(List<Integer> integers) {
        int[] result = new int[integers.size()];
        Iterator<Integer> iterator = integers.iterator();
        for (int i = 0; iterator.hasNext(); i++) {
            result[i] = iterator.next();
        }
        return result;
    }
}

例如使用

ColorStateListBuilder builder = new ColorStateListBuilder();
builder.addState(new int[] { android.R.attr.state_pressed }, ContextCompat.getColor(this, colorRes))
       .addState(new int[] { android.R.attr.state_selected }, Color.GREEN)
       .addState(..., some color);

if(// some condition){
      builder.addState(..., some color);
}
builder.addState(new int[] {}, colorNormal); // must add default state at last of all state

ColorStateList stateList = builder.build(); // ColorStateList created here

// textView.setTextColor(stateList);


Answer 6:

如果你使用的资源Colors.xml

int[] colors = new int[] {
                getResources().getColor(R.color.ColorVerificaLunes),
                getResources().getColor(R.color.ColorVerificaMartes),
                getResources().getColor(R.color.ColorVerificaMiercoles),
                getResources().getColor(R.color.ColorVerificaJueves),
                getResources().getColor(R.color.ColorVerificaViernes)

        };

ColorStateList csl = new ColorStateList(new int[][]{new int[0]}, new int[]{colors[0]}); 

    example.setBackgroundTintList(csl);


Answer 7:

下面是如何创建一个例子ColorList在科特林编程方式:

val colorList = ColorStateList(
        arrayOf(
                intArrayOf(-android.R.attr.state_enabled),  // Disabled
                intArrayOf(android.R.attr.state_enabled)    // Enabled
        ),
        intArrayOf(
                Color.BLACK,     // The color for the Disabled state
                Color.RED        // The color for the Enabled state
        )
)


文章来源: How do I create ColorStateList programmatically?