The method onClick(View) of type oddg must override a superclass method?

问题

I am occurring error like:

"The method onClick(View) of type oddg must override a superclass method".

I am confused where exactly error has occurred. Can you please guide me, what exactly error is?

public class oddg extends Activity implements OnClickListener
{
        ProgressDialog dialog;
        int increment;
        int maximum ;
        private static final String TAG = "ServicesDemo";

        @Override
        public void onCreate(Bundle savedInstanceState) 
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main1);
            Button startbtn = (Button) findViewById(R.id.startbtn);
            startbtn.setOnClickListener(this);

        }

        @Override
        public void onClick(View arg0)
        { }
}

This is my code... Thanks in Advance-- Onkar

回答1:

I think the problem is that you're compiler settings are set to Java 1.5 instead of Java 1.6. Since Java 1.6 the annotation @Override is not only possible for inherited methods from a superclass but also for implemented methods from an interface. But if your compiler is still set to 1.5 the problem is that he will check if you're overwriting a method from a super class. In your example this is not the case since you're implementing a method from an interface.

As a side note it would be good to follow Java Naming Conventions in your code. So all classes begin with an upper case letter.

回答2:

I had the same trouble and I fixed it like this:

Open Project settings->Java Compiler
Set Enable Project Specific Settings to disable

回答3:

This isn't directly appropriate to this question but you will also get this error if you haven't declared implements OnClickListener on the class declaration.

// Wrong
public class aClass extends Activity {
}
// Right
public class aClass extends Activity implements OnClickListener {
}

This may seem dum to the more experienced coder but I'm new to this and it fooled me.

回答4:

Read about @Override annotation. It means, that once you have annotated the method with @Override, the compiler checks if it really an overrided method, and shows an error if its not.

Also, you have to have Language Level 6 in order to use it with interface implementing methods. In IDEA you can do it via Project Setup.

回答5:

I had the same problem. I found the solution writing well the import.

I replaced

import android.content.DialogInterface.OnClickListener; //(wrong)

for

import android.view.View.OnClickListener;

回答6:

"RoflcoptrException" is right! You shoud set java compiler to 1.6 Project properties -> Java compiler ->1.6

回答7:

If you are using android studio , you can also override your method by pressing ctrl+O or just go to code-> Overide and override appropriate method . It will automatically override your method .

来源：https://stackoverflow.com/questions/5776126/the-method-onclickview-of-type-oddg-must-override-a-superclass-method

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java

android

overriding