android 如何自定义视图属性和获取自定属性值？

attrs.xml：

<resources>
    <declare-styleable name="CustomTextView">
        <attr name="value" format="string" />
    </declare-styleable>
</resources>

布局文件：

<com.google.android.flexbox.FlexboxLayout
    style="@style/fragment_home_drawer_flexbox"
    android:onClick="@{(view) -> vm.ageItemClickHandle(view)}">

    <TextView
        style="@style/fragment_home_drawer_search_item_text"
        android:layout_marginStart="0dp"
        android:text="不限"
        app:value=""
    />
    <TextView
        style="@style/fragment_home_drawer_search_item_text"
        android:text="18-25"
        app:value="18-25"
    />
 
</com.google.android.flexbox.FlexboxLayout>

获取自定义属性值：

public void ageItemClickHandle(View view) {
    if (view instanceof TextView) {
        TextView textView = (TextView) view;
        TypedArray typedArray = getContext().obtainStyledAttributes(textView, R.styleable.CustomTextView);
        String value = typedArray.getString(R.styleable.CustomTextView_value);
        typedArray.recycle();

        // ...
    }
}