Environment一些方法的测试

Environment.getExternalStorageDirectory():/storage/emulated/0
Environment.isExternalStorageEmulated():true
Environment.isExternalStorageRemovable():false
Environment.getDataDirectory():/data
Environment.getDownloadCacheDirectory():/cache
Environment.getRootDirectory():/system
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_ALARMS):/storage/emulated/0/Alarms
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM):/storage/emulated/0/DCIM
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS):/storage/emulated/0/Download
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES):/storage/emulated/0/Movies
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC):/storage/emulated/0/Music
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_NOTIFICATIONS):/storage/emulated/0/Notifications
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES):/storage/emulated/0/Pictures
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PODCASTS):/storage/emulated/0/Podcasts
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RINGTONES):/storage/emulated/0/Ringtones