I have this main class which displays a button and on click of the
button, the NextActivity class should be called. I have defined the
NextActivity class in the same package. But when I click the button,
the application closes stating there is some error.

But when i directly start an intent (un comment the last line). The
application goes there without displaying the Main class. Please let
me know what is the mistake i am doing.

package com.intents;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainClass extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button btnOpen = (Button) findViewById(R.id.btnNext);
        btnOpen.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Toast.makeText(getBaseContext(),
                        "You have clicked the Open button",
                        Toast.LENGTH_SHORT).show();
                Intent i = new Intent();
                i.setClassName("com.intents", "NextActivity");
                startActivity(i);

            }

        });
       //startActivity(new Intent( this, NextActivity.class));
    }
}

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