Question

我为颜色定义了自定义样式属性..

<declare-styleable name="CustomView">
        <attr name="custom1" format="boolean" />
        <attr name="custom2" format="reference|color" />
</declare-styleable>

当通过obtainStyledAttributes获取xml中定义的属性时，即使没有在xml中定义属性，它也始终将size返回为1。

TypedArray attributes = context.obtainStyledAttributes(attrs, R.styleable.CustomView, 0, 0);
final int size = attributes.getIndexCount();

for(int i = 0; i < size; i++) {
    final int attr = attributes.getIndex(i);
    if (attr == R.styleable.CustomView_custom1) {
        boolean b = attributes.getBoolean(attr, false);
     }
    else if (attr == R.styleable.CustomView_custom2) {
        ColorStateList cs = attributes.getColorStateList(attr);
        int color = cs.getDefaultColor();
    }
}

即使没有在xml中定义属性，此大小始终为1。因为这种颜色有一些随机值，不确定从哪里得到一些值？

输出如下：

Test﹕ ----
Test﹕ CustomView= 2130772048
Test﹕ CustomView= 2130772049
Test﹕ ----
Test﹕ AttributeSet= 16842901 textSize
Test﹕ AttributeSet= 16842904 textColor
Test﹕ AttributeSet= 16842927 gravity
Test﹕ AttributeSet= 16842960 id
Test﹕ AttributeSet= 16842966 paddingLeft
Test﹕ AttributeSet= 16842968 paddingRight
Test﹕ AttributeSet= 16842996 layout_width
Test﹕ AttributeSet= 16842997 layout_height
Test﹕ AttributeSet= 16843000 layout_marginTop
Test﹕ AttributeSet= 16843101 singleLine
Test﹕ AttributeSet= 16843119 drawableLeft
Test﹕ AttributeSet= 16843121 drawablePadding
Test﹕ AttributeSet= 16843139 layout_toRightOf
Test﹕ AttributeSet= 2130772048 custom1

Answer 1

奇怪的问题。我只能建议你添加调试日志输出并试验变化，以便更好地了解正在发生的事情。

这些语句转储自定义视图的属性ID，并在布局XML中转储自定义视图实例的AttributeSet。

Log.i("Test", "----");
for (int id : R.styleable.CustomView) {
    Log.i("Test", "CustomView= " + id);
}

Log.i("Test", "----");
int n = attrs.getAttributeCount();
for (int i = 0; i < n; i++) {
    Log.i("Test", "AttributeSet= " + attrs.getAttributeNameResource(i) + " " + attrs.getAttributeName(i));
}

要查看主题中是否设置了custom2属性：

TypedValue val = new TypedValue();
boolean resolved = context.getTheme().resolveAttribute(R.attr.custom2, val, true);
if (resolved) {
    Log.i("Test", "Custom2 in theme");
} else {
    Log.i("Test", "Custom2 NOT in theme");
}

Answer 2

对我来说，问题是这样的：

  private fun init(attrs: AttributeSet?) { 
    post {
        val attributes = context.theme.obtainStyledAttributes(
            attrs,
            R.styleable.CustomButton,
            0, 0
        )
        .....

如果我在帖子中获得了属性{}，则没有。这可行：

 private fun init(attrs: AttributeSet?) {
    val attributes = context.theme.obtainStyledAttributes(
        attrs,
        R.styleable.CustomButton,
        0, 0
    )
    post {
    ....

自定义样式属性始终默认设置为

2 个答案: