Question: 有关于Emoji大家感兴趣的话题可以在这里盖

1.如何判断Emoji的展示类型，从源代码中可见，正如Unicode Emoji文档中描述通过 0xFE0F 和 0xFE0E 即可判断展示类型。

EmojiProcessor.java

/**

* @param codePoint CodePoint to check

*

* @return {@code true} if the codepoint is a emoji style standardized variation selector

*/

private static boolean isEmojiStyle(int codePoint) {

return codePoint ==0xFE0F;

}

/**

* @param codePoint CodePoint to check

*

* @return {@code true} if the codepoint is a text style standardized variation selector

*/

 private static boolean isTextStyle(int codePoint) {

return codePoint ==0xFE0E;

 }

}

来判断 文本类型 或 emoji类型

2.如何判断文字宽度，Paint 中已经给出API可以做到。

Paint.java 

/**

* Return the width of the text.

*

* @param text The text to measure. Cannot be null.

* @return The width of the text

*/

public float measureText(String text) {

if (text ==null) {

throw new IllegalArgumentException("text cannot be null");

 }

return measureText(text, 0, text.length());

}

返回字符串宽度。