getFilesDir: /data/user/0/包名/files
getExternalFilesDir: /storage/emulated/0/Android/data/包名/files
getExternalStorageDirectory: /storage/emulated/0
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS): /sdcard/Download
getFilesDir: /data/user/0/包名/files
getExternalFilesDir: /storage/emulated/0/Android/data/包名/files
getExternalStorageDirectory: /storage/emulated/0
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS): /sdcard/Download