In Android Studio, you can do this:

For example, if you want to change com.example.app to my.awesome.game, then:

1. In your Project pane, click on the little gear icon ( )

2. Uncheck / De-select the Compact Empty Middle Packages option

1. Your package directory will now be broken up in individual directories

2. Individually select each directory you want to rename, and:

• Right-click it
• Select Refactor
• Click on Rename
• In the Pop-up dialog, click on Rename Package instead of Rename Directory
• Enter the new name and hit Refactor
• Allow a minute to let Android Studio update all changes
• Note: When renaming com in Android Studio, it might give a warning. In such case, select Rename All

1. Now open your Gradle Build File (build.gradle - Usually app or mobile). Update the applicationId to your new Package Name and Sync Gradle, if it hasn't already been updated automatically:

1. Done! Anyways, Android Studio needs to make this process a little simpler.

Android:versionCode是什么？

android:versionCode表示该软件的版本号，对用户是不可见的，它必须是一个int型的整数，它的大小代表该软件版本升级过多少次，因此每次发布新版本该值都会+1，如Android:versionCode = ”62″ ,代表此软件已经发布过62次了。

作用：软件的升级全靠获取服务端的versionCode进行对比，发现比现在的大就会提示用户升级

Android:versionName是什么？

android:versionName表示该软件的版本名字，但它是对用户是可见的，由三部分组成..,该值是个字符串，如Android:versionName:3.4.4,表示当前的版本为3.4.4

AndroidManifest.xml

方法： background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAE8AAABPCAYAAACqNJiGAAAAGXRFW…ZY+Hkh2wfu5/EX/rbp56Wb7236eWk+/LyQbXTeV5H+FWAA7eqC0D2aO2cAAAAASUVORK5CYII=);

效果：

renfer URL: http://javascript.ruanyifeng.com/tool/phantomjs.html