Android : Changing Textview in runable class that is being called by postDelayed

I have a Runnable class that ends up changing the text and color of a textview depending on a certain value that it gets from the SharedPreferences.

I tried creating the class inside a class that is calling the runnable at first, that worked fine, Now I wanted to put this class inside it's own class file to keep it clean and to be able to access it easily from other classes.

However I get a nullpointer now and after commenting some code out it seems like the textview is causing the problem.

This is my class

public class SettingsRunnable extends Activity implements Runnable {
View mView;
SharedPreferences mSettings;
SharedPreferences.Editor mEditSettings;
TextView mText;
CardScrollView mCardScroller;

public SettingsRunnable(View view, TextView text, SharedPreferences settings, CardScrollView cardView)
{
    this.mView = view;
    this.mText = text;
    this.mSettings = settings;
    this.mCardScroller = cardView;
    mEditSettings = mSettings.edit();
}

@Override
public void run() {
    try {
        if(mView == null)
        {
            mView = mCardScroller.getSelectedView();
        }
        String status = "";
        if (mSettings.contains("headgesture")) {
            status = mSettings.getString("headgesture", "");
            mText.setText(status);
            switch (status) {
                case "on":
                    mText.setTextColor(getResources().getColor(R.color.status_on));
                    break;
                case "off":
                    mText.setTextColor(getRecources().getColor(R.color.status_off));
                    break;
            }
        }
        if (mSettings.contains("network")) {
            status = mSettings.getString("network", "");
            //mText.setText(status);
            switch (status) {
                case "always":
                    break;
                case "wifi":
                    break;
                case "never":
                    break;
            }
        }
        mView.setTag(mText);
    }
    catch(Exception e)
    {
        Log.wtf("ErrorRun", e.getMessage());
    }
}
}

Then I've the following in my onCreate() in the class that is trying to call it.

settings = getSharedPreferences(PREFERENCE, PRIVATE);
view = new View(this);
mText = (TextView) findViewById(R.id.headgesture_status);
setR = new SettingsRunnable(view, mText, settings, mCardScroller);
handler.postDelayed(setR, 1000);