How to access shared preference boolean value from another class

Question

I have created a radio group which contains two buttons, I can select one and save it, it works fine, still stored after closing the app. What I want to do is use the value of the radio buttons in another class. Here is my settings class which contains the shared preferences code: ``` public class Settings extends Activity { private String settingsTAG = "AppNameSettings"; private SharedPreferences prefs; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.settings); prefs = getSharedPreferences(settingsTAG, 0); final RadioButton rb0 = (RadioButton) findViewById(R.id.radioInternetYes); final RadioButton rb1 = (RadioButton) findViewById(R.id.radioInternetNo); rb0.setChecked(prefs.getBoolean("rb0", true)); rb1.setChecked(prefs.getBoolean("rb1", false)); Button btnSave = (Button) findViewById(R.id.btnSave); btnSave.setOnClickListener(new View.OnClickListener() { public void onClick(Vi…

Accepted Answer

Instead of `if(rb0 = true)` (which should be `==` anyways), you need to access the SharedPreferences again. Quoted from http://developer.android.com/guide/topics/data/data-storage.html:

To read values, use SharedPreferences methods such as getBoolean() and getString().

So you would use something like:

```
String settingsTAG = "AppNameSettings";
SharedPreferences prefs = getSharedPreferences(settingsTAG, 0);
boolean rb0 = prefs.getBoolean("rb0", false);
if(rb0 == true){ 
    // Do something
}
```

How to access shared preference boolean value from another class

Solution

Problem