Get Context in Non-Activity Class

get Context in non-Activity class

If your class is non-activity class, and creating an instance of it from the activiy, you can pass an instance of context via constructor of the later as follows:

class YourNonActivityClass{

// variable to hold context
private Context context;

//save the context recievied via constructor in a local variable

public YourNonActivityClass(Context context){
    this.context=context;
}

}

You can create instance of this class from the activity as follows:

new YourNonActivityClass(this);

How to get activity context into a non-activity class android?

Try this:

class myActivity extends Activity
{
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {

        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);

        Info = new Authenticate().execute(ContentString).get();
        ItemsStore.SetItems(Info, getApplicationContext());

    }

}

class ItemsStore
{
   public void SetItems(Information info, Context mContext)
   {
            SharedPreferences  localSettings = mContext.getSharedPreferences("FileName",
            Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = localSettings.edit();
            editor.putString("Url", info.Url);
            editor.putString("Email", info.Email);
   }
}

Get Context in non-activity class multiple times

Change

this.cntxt = context;

To

cntxt = context.getApplicationContext();

instead. Where cntxt is a static context. It will not create activity leak, since it uses application context.

It is better if you learn about background service in Android
https://developer.android.com/training/run-background-service/create-service.html

Context inside non activity class

public Example(Context context){
        this.context = context.getApplicationContext();
    }

why? use

this.context = context;

instead.

or

 wifihist = new wifiHistoryDatabaseHandler(getActivity());

The context variable in telnet class is null.

You can consider to pass context directly in the constructor of Telnet async task

public Telnet(Context c)
{ 
   mContext = c;
}

How to retrieve a context from a non-activity class?

If class B requires a Context to operate, then I don't see any problem having class A provide that to it (through a parameter on the play method, a parameter in a constructor, etc).

I don't think you are doing any poor OOP by providing class B the dependencies that it needs to do it's job.

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