一条关于安卓开发Intent的问题

Question

MainActivity的代码

package black_lotus.blacklotus;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.*;
import android.view.View.OnClickListener;
import android.view.View;
import android.content.Intent;

public class MainActivity extends Activity {
public final static String SECOND="SECOND";
public final static String THIRD="THIRD";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button btn=(Button)findViewById(R.id.btn1);
    btn.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            Intent intent=new Intent();
            intent.setAction("black_lotus.blacklotus.MainActivity."+SECOND);
            intent.addCategory("black_lotus.blacklotus.MainActivity."+THIRD);
            startActivity(intent);
        }
    });
}

AndroidMainfest.xml的关于第二个窗口的代码
android:name=".second_activity"
android:label="第二个窗口">

        <intent-filter>
            <action android:name="SECOND"/>
           <category android:name="android.intent.category.THIRD"/> 
           <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
    </activity>

            但是logcat里就是说No Activity found to handle Intent，我在网上查了不少资料也没有发现哪里有错，求大家帮帮忙看看哪里出错，谢谢

Answer 1

上面 intent.setAction("black_lotus.blacklotus.MainActivity."+SECOND);
intent.addCategory("black_lotus.blacklotus.MainActivity."+THIRD);
这两句改成intent.setAction(black_lotus.blacklotus.MainActivity.SECOND);
intent.addCategory(black_lotus.blacklotus.MainActivity.THIRD);也不行