SharedPreferences of Remote service always return null

Question

I have a trouble with SharedPreferences when I try read data from remote service.

First, In SplashScreenActivity, my app start and bind my RemoteService

Second, SplashScreenActivity start MainActivity, this MainActivity will save configuration info to SharedPreferences:

SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
SharedPreferences.Editor editor = mSharedPreferences.edit();
editor.putString("ABC_KEY", "abc");
editor.apply();

Then, MainActivity will send Broadcast:

sendBroadcast(new Intent("PLZ_READ_DATA"));

Finally, in RemoteService receive above Broadcast, it will read data from SharedPreferences:

SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
String str = mSharedPreferences.getString("ABC_KEY", null);

The problem is str is always null.

What is the magic here? Can anyone explain it and give a solution for read data from SharedPreferences on this case.

is your remote service running in the same process? what happens if you add logs before and after, can you be sure the insertion happens first? — thepoosh, Jul 31 '16 at 17:05
`RemoteService` will run in another process. I logged before and after writing data to `SharedPreferences`, everything works exactly, but the read process does not work as expected. — Robust, Jul 31 '16 at 17:08

score 0 · Accepted Answer · edited May 23 '17 at 12:16

0

Since you're dealing with multiple processes you need to specify the mode to support that as can be seen from this answer

edited May 23 '17 at 12:16

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answered Jul 31 '16 at 17:00

thepoosh

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Ok, thank you so much. I will try another way, because `MODE_MULTI_PROCESS ` has been deprecated in Android M. – Robust Jul 31 '16 at 17:18

SharedPreferences of Remote service always return null

1 Answers1