android studio toast save image to gallery

Finally, the names of the resources are turned into constant field names that are checked at compile time, so there's less of an opportunity for mismatches between the code and the resources themselves.

Also, many parts of the API support the use of resource identifiers.

With resources, there's built-in support for providing alternatives for different languages, OS versions, screen orientations, etc., as described here. There are some difference from res directory. InputStream file = r.openRawResource(R.raw.filename) Īndroid offers one more directory where you can keep files which also will be included in package. Pass in the filename (without the extension) as the variable name from the R.raw class, as shown in the following code To access these read-only file resources, call the openRawResource method from your application’s Resource object to receive an InputStream based on the specified file. If your application requires external file resources, you can include them in your distribution package by placing them in the res/raw folder of your project hierarchy. There’s no point trying to write it if it’s not there. Second, on devices that do have removable storage, the storage might be removed at the time your application checks it. On these, the external storage directory always exists-it is just in a different partition of the same flash memory storage as internal storage. However, there are several complications.įirst, some devices don’t have removable storage. Good for local resources that can’t or shouldn’t be compiled. Protected read-only space inside the APK bundle. Often, this is a physical SD card in the device. Requires the WRITE_EXTERNAL_STORAGE permission in API Level 4+.

Externally mountable space to read and write file data. Internal storage is always located in the device’s flash memory area - part of the 8 GB or 32 GB of 'storage' that your device was advertised with-under /data/data/PKG_NAME/. Protected directory space to read and write file data. There are three main locations in which an application can work with files: How-to read/write files in Android Android Īndroid supports all the standard Java file I/O APIs for create, read, update, and delete (CRUD) operations, along with some additional helpers to make accessing those files in specific locations a little more convenient.

Android studio toast save image to gallery