//保存铃声的位置
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RINGTONES).getPath()=/storage/emulated/0/Ringtones
context.getCacheDir().getPath()=/data/data/包名/cache
context.getFilesDir().getPath()=/data/data/包名/files
context.getObbDir().getPath()=/storage/emulated/0/Android/obb/包名
context.getExternalCacheDir().getPath()=/storage/emulated/0/Android/data/包名/cache
context.getExternalFilesDir(Environment.DIRECTORY_ALARMS).getPath()=/storage/emulated/0/Android/data/包名/files/Alarms
context.getExternalFilesDir(Environment.DIRECTORY_DCIM).getPath()=/storage/emulated/0/Android/data/包名/files/DCIM
context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getPath()=/storage/emulated/0/Android/data/包名/files/Download
context.getExternalFilesDir(Environment.DIRECTORY_MOVIES).getPath()=/storage/emulated/0/Android/data/包名/files/Movies
context.getExternalFilesDir(Environment.DIRECTORY_MUSIC).getPath()=/storage/emulated/0/Android/data/包名/files/Music
context.getExternalFilesDir(Environment.DIRECTORY_NOTIFICATIONS).getPath()=/storage/emulated/0/Android/data/包名/files/Notifications
context.getExternalFilesDir(Environment.DIRECTORY_PICTURES).getPath()=/storage/emulated/0/Android/data/包名/files/Pictures
context.getExternalFilesDir(Environment.DIRECTORY_PODCASTS).getPath()=/storage/emulated/0/Android/data/包名/files/Podcasts
context.getExternalFilesDir(Environment.DIRECTORY_RINGTONES).getPath()=/storage/emulated/0/Android/data/包名/files/Ringtones
context.getDatabasePath("XXX").getPath()=/data/data/包名/databases/XXX
context.getPackageCodePath()=/data/app/包名-2/base.apk
context.getPackageResourcePath()=/data/app/包名-2/base.apk