CODEWITHSUNDEEP
androidsharedpreferences
robj
robj

Reputation: 21

Need to check if Shared Preferences String or Boolean exist

I wonder if any one can help me, i am trying to get my head around shared preferences, i assume they are stored in the device (tablet) and can be checked to see they exist. My code below (first one) i want a button once clicked to put a string or boolean in the shared preferences. The second code is to see if the shared prefs exist if it does make a settext change if not ignore and look for the next string

cala1.setOnClickListener(new View.OnClickListener() { 
public void onClick(View v) { 
     LoadPreferences();
         SharedPreferences sharedpreferences = getSharedPreferences("prefman",   MODE_PRIVATE);        
          SharedPreferences.Editor editor = sharedpreferences.edit();
          editor.putString("cal1","c1");
          editor.commit();                });


enter4.setOnClickListener(new View.OnClickListener() { 
             public void onClick(View v) { 
 LoadPreferences();
              SharedPreferences sharedpreferences = getSharedPreferences("prefman", MODE_PRIVATE);        
            sharedpreferences.contains("cal1"); 

                 if (sharedpreferences.getString("cal1","c1").equals("cal1"));

                 {
                     {cexist1.setText("Shared prefs exit"); 

                 }
else

Upvotes: 2

Views: 10341

Answers (1)

kmera
kmera

Reputation: 1745

I don't get why you call sharedpreferences.contains("cal1") when you ignore the return value anyway. The Android documentation for SharedPreferences says the following:

contains(String key) Checks whether the preferences contains a preference.

Looks like that is what you want, try using the call in you if clause.

if (sharedpreferences.contains("cal1")) {
   cexist1.setText("Shared prefs exit"); 
}

the format of your code above is a bit messy too - makes it harder to read ;)

Upvotes: 17

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