Question

我按照this site上的教程来实现state-list的自定义状态。它适用于布尔属性，但不适用于字符串属性。

这是我的源代码：

州名单：
属性：

    <declare-styleable name="CategoryIconView">
            <attr name="category_id" format="string"/>
        </declare-styleable>

自定义视图：

public class CategoryIconView extends ImageView {

// this is used when we want to merge our state with the ones from the system
private static final int[] CATEGORY_ID_STATE_SET = {R.attr.category_id};

String categoryID;
public CategoryIconView(Context context) {
    super(context);
}

public CategoryIconView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public CategoryIconView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@Override
public int[] onCreateDrawableState(int extraSpace) {
    LogUtils.d(getClass().getSimpleName(), "category ID " + categoryID);
    final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
    if (categoryID != null) {
        mergeDrawableStates(drawableState, CATEGORY_ID_STATE_SET);
    }
    return drawableState;
}

// this method will be used when you will need to set your image button state in the code
public void setCategoryID(String categoryId){
    this.categoryID = "Three";
    refreshDrawableState();
}
}

Answer 1

实际上你遗漏了一些陈述，下面找到了这个

的解决方案

public class CategoryIconView extends ImageView {

        // this is used when we want to merge our state with the ones from the system
        private static final int[] CATEGORY_ID_STATE_SET = {R.attr.category_id};

        String categoryID;

        public CategoryIconView(Context context) {
            super(context);
        }

        public CategoryIconView(Context context, AttributeSet attrs) {
            super(context, attrs);
// R.styleable.CustomStates is the id of the custom state and CustomStates it's the name of your styleable
        // from attributes.xml
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CategoryIconView, 0, 0);

        // R.styleable.CustomStates_has_new_data is an ID that is created automatically when you create your
        // custom state list in attributes.xml
        categoryID = typedArray.getString(R.styleable.CategoryIconView_category_id);
        }

        public CategoryIconView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
            // R.styleable.CustomStates is the id of the custom state and CustomStates it's the name of your styleable
            // from attributes.xml
            TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CategoryIconView, 0, 0);

            // R.styleable.CustomStates_has_new_data is an ID that is created automatically when you create your
            // custom state list in attributes.xml
            categoryID = typedArray.getString(R.styleable.CategoryIconView_category_id);
        }

        @Override
        public int[] onCreateDrawableState(int extraSpace) {
            Log.d(getClass().getSimpleName(), "category ID " + categoryID);
            final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
            if (categoryID != null) {
                mergeDrawableStates(drawableState, CATEGORY_ID_STATE_SET);
            }
            return drawableState;
        }

        // this method will be used when you will need to set your image button state in the code
        public void setCategoryID(String categoryId) {
            this.categoryID = "Three";
            refreshDrawableState();
        }
    }

Android - 具有字符串值的自定义状态

1 个答案: