Intent start second activity

MyActivity:

package com.hhy.ActivityChange;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MyActivity extends Activity {

    private Button button;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button = (Button)findViewById(R.id.button);

        ButtonListener listener = new ButtonListener();
        button.setOnClickListener(listener);

    }
    class ButtonListener implements View.OnClickListener{
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setClass(MyActivity.this, SecondActivity.class);
            startActivity(intent);
        }
    }
}

SecondActivity:

package com.hhy.ActivityChange;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class SecondActivity extends MyActivity {

    private TextView textView;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.secmain);

        textView = (TextView)findViewById(R.id.textView);
    }

AndroidManifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.hhy.ActivityChange"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="17"/>
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="MyActivity"
                  android:label="MyActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity android:name=".SecondActivity"
                android:label="Second Activity"/>
    </application>
</manifest>