Android(安卓)存储路径
16lz
2021-01-24
手机存储:内部存储,外部存储
内部存储
内部存储是指手机的存储,Environment.getDataDirectory().getParentFile()为根目录,这个目录下还有一些私密的数据,比如:databases(数据库)、shared_prefs(SharedPreferences)等,私密数据需要有root权限才能打开
主要方法 | 路径 |
---|---|
Environment.getDataDirectory() | /data |
Environment.getDownloadCacheDirectory() | /cache |
Environment.getRootDirectory() | /system |
外部存储
外部存储又分为SD卡和扩展卡内存
- SD卡
主要方法 | 路径 |
---|---|
Environment.getExternalStorageDirectory() | /storage/sdcard0 |
Environment.getExternalStoragePublicDirectory(DIRECTORY_ALARMS) | /storage/sdcard0/Alarms |
Environment.getExternalStoragePublicDirectory(DIRECTORY_DCIM) | /storage/sdcard0/DCIM |
Environment.getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS) | /storage/sdcard0/Download |
Environment.getExternalStoragePublicDirectory(DIRECTORY_MOVIES) | /storage/sdcard0/Movies |
Environment.getExternalStoragePublicDirectory(DIRECTORY_MUSIC) | /storage/sdcard0/Music |
Environment.getExternalStoragePublicDirectory(DIRECTORY_NOTIFICATIONS) | /storage/sdcard0/Notifications |
Environment.getExternalStoragePublicDirectory(DIRECTORY_PICTURES) | /storage/sdcard0/Pictures |
Environment.getExternalStoragePublicDirectory(DIRECTORY_PODCASTS) | /storage/sdcard0/Podcasts |
Environment.getExternalStoragePublicDirectory(DIRECTORY_RINGTONES) | /storage/sdcard0/Ringtones |
第二个开始之后的就是9大公有目录,通常自己的数据不建议放置在公有目录,建议放在私有目录,私有目录就是自己的app包名下,如:
方法 | 路径 |
---|---|
getExternalFilesDir() | /storage/emulated/0/Android/data/com.test(包名)/files/test |
getExternalCacheDir() | /storage/emulated/0/Android/data/com.test(包名)/cache/test |
一般情况下有包名的路径我们都是调用Context中的方法来获得,没有包名的路径,我们直接调用Environment中的方法获得。
- 扩展卡内存
扩展内存就是我们插入的外置SD卡
private static String getExtendedMemoryPath(Context mContext) { StorageManager mStorageManager = (StorageManager) mContext.getSystemService(Context.STORAGE_SERVICE); Class<?> storageVolumeClazz = null; try { storageVolumeClazz = Class.forName("android.os.storage.StorageVolume"); Method getVolumeList = mStorageManager.getClass().getMethod("getVolumeList"); Method getPath = storageVolumeClazz.getMethod("getPath"); Method isRemovable = storageVolumeClazz.getMethod("isRemovable"); Object result = getVolumeList.invoke(mStorageManager); final int length = Array.getLength(result); for (int i = 0; i < length; i++) { Object storageVolumeElement = Array.get(result, i); String path = (String) getPath.invoke(storageVolumeElement); boolean removable = (Boolean) isRemovable.invoke(storageVolumeElement); if (removable) { return path; } } } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } return null;}
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