BasePromptViewConfig.java 文件源码

/**
 * @return the long value for the attribute at <code>index</code>, if defined; null otherwise
 */
@Nullable
private static Long suppliedLongOrNull(
        @Nullable final TypedArray typedArray,
        @StyleableRes final int index) {

    if (typedArray != null) {
        final int integer = typedArray.getInt(index, DEFAULT_INTEGER_VALUE_IF_UNDEFINED);

        return integer != DEFAULT_INTEGER_VALUE_IF_UNDEFINED ? (long) integer : null;
    }

    return null;
}