Save Settings revisited

Erel

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• Dec 4, 2011

• #2

StateManager includes two features. It saved the UI state and it handles arbitrary settings. You will need to use the second feature for these two values.

 

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Pops

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• Dec 13, 2011

• #3

I'm sorry, and not asking for free ride, but I can't seem to wrap my mind around this. I've rewritten my app from App Inventor almost completely with b4a, with this exception:
When the app restarts I need button1.background, button1.text, & label.1 text restored. I've poured over the tutorials on map and statemanager until my eyes glaze over. Any help is highly appreciated!

 

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U

unba1300

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• Dec 13, 2011

• #4

I haven't tried StateManager yet, but settings could be stored and retrieved using File.WriteMap and File.ReadMap.
Tutorial: http://www.b4x.com/forum/basic4android-getting-started-tutorials/6690-text-files.html

 

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Pops

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• Dec 13, 2011

• #5

Thanks, I'll have a look.

 

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nfordbscndrd

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• Dec 14, 2011

• #6

You might also want to see this page in the documentation Wiki.

 

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Pops

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• Dec 15, 2011

• #7

I added code to the StateManager module for my button background and label text. It works perfectly for changing orientation and backing out of app. When system kills the app, however, only the label text is restored. Observing in debug mode, the original button background images are loaded, then the button disappears. This happens at: "button1 = data(0)"
What am I missing, other than the fact that I don't know how to save and restore the button background?
The button background is a contact photo and the label text is the contact name.

 

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Erel

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• Dec 16, 2011

• #8

You should post your updated code.

 

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P

Pops

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• Dec 16, 2011

• #9

I will do that when I get home..about 6 hrs from now.

 

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Pops

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• Dec 16, 2011

• #10

I'll post the revision when I get home. This is basically what I did:
On the StateManager module, I used the "edittext" lines as a reference and put "label1 as Label", etc. I did the same with "button". As I mentioned, this works great for orientation change and using the back button to leave the app. When the app is killed the label info is restored, but the contact photo isn't, which means I didn't save it properly. The button, although invisible, are still there and fully functional.

 

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Pops

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• Dec 16, 2011

• #11

Here is the revised StateManager file:
This is NOT the latest StateManager that Erel uploaded recently.

 

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• StateManager.zip

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Last edited: Dec 16, 2011

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Erel

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• Dec 17, 2011

• #12

You cannot save Drawable objects like that.
Only primitives, custom types and objects that implement the Serializable interface can be saved with RandomAccessFile.WriteObject.

You can save the image file and then load the file when the state is restored.
You can use the Tag property to save the file name when you set the background.

 

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Pops

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• Dec 21, 2011

• #13

Thanks,Erel, for that info.

 

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