Question

Hello i have a problem with the elimination of NullEx …

I set mContext = context and now i have errors:

Implicit super constructor LinearLayout() is undefined. Must explicitly invoke another constructor

Constructor call must be the first statement in a constructor

public DigitalClock(Context context) {
    mContext=context;
    this(context, null);
 } 

Earlier thread Android alarm Clock which shows problem.

Answer 1

You need a superclass constructor call.

public DigitalClock(Context context) {
    super(context); // Add a line like this.  
                   // Consult constructor documentation for correct usage.
    this(context, null); // this line must also be at the top.
    mContext=context;
}