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Update README.md
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jiang111 authored Nov 23, 2017
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* 当Activity 继承 FragmentActivity的时候,调用startActivityForResult方法中传递的requestCode范围应该在0-65535范围内,否则会报"Can only use lower 16 bits for requestCode"异常。

* Android有一个隐藏的类可以判断文本输入框内输入的是不是表情,这个类就是 android.text.Emoji类,它的isEmoji(int codePoint)方法可以直接判断出来是不是表情。这个类是隐藏的,如果要用到则需要将它拷贝出来。

#### 摘自[如下地址](https://github.com/jiang111/awesome-android-tips/blob/master/Authors.md)


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