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how to hold the previous value used in android

can somebody tell me how to hold the previous string value in the current session in android



I have a scenario where i pass a string on the click event, i need to keep that id for the doing some other operation in the current session
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roy_sanu
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roy_sanu
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1 Solution
 
PCableGuyCommented:
You can make a global class which can have "Getters" and "Setters" to Get and Set a String by extending the Application class.

Read Section 2. By Extending the Application class
http://androidresearch.wordpress.com/2012/03/22/defining-global-variables-in-android/


You can also pass a Bundle to an Activity, which is a method to pass variables between Activities.
http://miragemiko.wordpress.com/2010/03/20/android-using-bundle-for-sharing-variables/
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roy_sanuAuthor Commented:
my question if i want to hold the same string value  for the next session how i can do that.

for example

"Let say i had a text and a button. i passed some value and pressed the click button it gave me some output, now i need to hold that immediate previous value to do some other operation or validation, let me know how to do that"
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Ess KayEntrapenuerCommented:
you can, write it to a file
or write to xml
or write to database

then retrieve it when you need it
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Ess KayEntrapenuerCommented:
or if its just from a function, make the function return something

here is psudocide



int x = 5
int y =  functionbla (x)

[now you have two values!! YAY]
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PCableGuyCommented:
roy_sanu,

Before you change the value, you need to put the current value in a String variable. This could be at the top of your click event before the text is changed. Be careful of the scope of the String variable. In other words if you declare it in the click event, then its scope is only in the click event. If you declare it as a Class variable, then it is global to the Class.

Assuming the text box has the value that you want to save and it's an EditText named editText1:

//Find the textbox
EditText etxt = (EditText) this.findViewById(R.id.editText1);                   
//Save the current text value in currentValue
String currentValue = etxt.getText().toString();
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roy_sanuAuthor Commented:
Any way i have used preferences to hold the data from my previous session that sounds me good enough

Thanks
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roy_sanuAuthor Commented:
Holding the previous session using preferences of android  is the  best  solution
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