SelectableTextHelper

可以任意选择文本并复制，使用方法如下

Step 1. Add the JitPack repository to your build file

Add it in your root build.gradle at the end of repositories:

allprojects {
	repositories {
		...
		maven { url 'https://jitpack.io' }
	}
}

Step 2. Add the dependency

dependencies {
        compile 'com.github.wulee510505:SelectableTextView:1.0.5'
}