Hi Inosh,
The Android's API suggested way of getting external storage details as
follows.
String storagePath =
android.os.Environment.getExternalStorageDirectory().getPath(); //
This gives the '/storage/emulated/0'
StatFs directoryStatus = new StatFs(storagePath);
So this is what we have used in our android agent as well. Even though the
word 'external' is used here, it does not mean the external storage that we
expect.
Usually what we think as the external storage is the external SD/microSD
card. However, as it mentioned in the API [1], 'external' is considered as
media/shared storage. It is a filesystem that can hold a relatively large
amount of data and that is shared across all applications (does not enforce
permissions). Traditionally this is a SD card, but it may also be
implemented as built-in storage in a device that is distinct from the
protected internal storage and can be mounted as a filesystem on a device.
Therefor even if we do the check "
*android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)*",
it always returns true since nowadays almost all the android devices are
shipped with built-in external storage.
So my suggestion is to calculate internal and external memories as follows.
String externalStorage = System.getenv("EXTERNAL_STORAGE"); // returns
'/storage/emulated/0'
String secondaryStorage = System.getenv("SECONDARY_STORAGE"); //
returns 'null' if device does not support external-sd-card or returns
'/storage/extSdCard'
Then we will be able get the accurate mount point details for both in
internal (externalStorage) and external (secondaryStorage) storage.
[1]
http://developer.android.com/reference/android/os/Environment.html#getExternalStorageDirectory%28%29
Regards,
On Wed, Jun 3, 2015 at 3:10 PM, Inosh Perera <[email protected]> wrote:
> Hi Dilan/Milan,
>
> In Android, as "EXTERNAL_MEMORY" implies both "INTERNAL+EXTERNAL"
> Could you explain this statement bit more? Isn't external memory normally
> the externally mounted SD card.
>
> Regards,
> Inosh
>
>
> On Wed, Jun 3, 2015 at 2:50 PM, Dilan Udara Ariyaratne <[email protected]>
> wrote:
>
>> Hi All,
>>
>> In Android, as "EXTERNAL_MEMORY" implies both "INTERNAL+EXTERNAL", to
>> accurately obtain information
>> from the agent, let's do a small calculation at the agent side to
>> retrieve correct values as follows.
>>
>> Current payload retrieved :
>>
>> {
>> "EXTERNAL_TOTAL_MEMORY": "4.92",
>> "INTERNAL_AVAILABLE_MEMORY": "4.78",
>> "EXTERNAL_AVAILABLE_MEMORY": "4.78",
>> "OPERATOR": "Android",
>> "BATTERY_LEVEL": "51",
>> "INTERNAL_TOTAL_MEMORY": "4.92"
>> }
>>
>> Here we can obtain the correct value for "EXTERNAL_TOTAL_MEMORY" as
>> EXTERNAL_TOTAL_MEMORY = EXTERNAL_TOTAL_MEMORY - INTERNAL_TOTAL_MEMORY
>> Similarly, the correct value for "EXTERNAL_AVAILABLE_MEMORY" as
>> EXTERNAL_AVAILABLE_MEMORY = "EXTERNAL_AVAILABLE_MEMORY" -
>> INTERNAL_AVAILABLE_MEMORY
>>
>> So the final outcome would look something similar to the following.
>>
>> {
>> "OPERATOR": "Android",
>> "BATTERY_LEVEL": "51",
>> "INTERNAL_TOTAL_MEMORY": "4.92",
>> "INTERNAL_AVAILABLE_MEMORY": "4.78",
>> "EXTERNAL_TOTAL_MEMORY": "0.00",
>> "EXTERNAL_AVAILABLE_MEMORY": "0.00"
>> }
>>
>> - - - - - - - - - - - - - - - - - - - - - - - - - -
>>
>> Cheers.
>>
>> *Dilan U. Ariyaratne*
>> Software Engineer
>> WSO2 Inc. <http://wso2.com/>
>> Mobile: +94775149066
>> lean . enterprise . middleware
>>
>
>
>
> --
> Inosh Perera
> Software Engineer, WSO2 Inc.
> Tel: 0785293686
>
--
Milan Harindu Perera
Software Engineer
*WSO2, Inc*
(+94) 77 309 7088
lean . enterprise . middleware
<http://lk.linkedin.com/in/milanharinduperera>
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