Activity won't start even after I add it to AndroidManifest

I am new to Android. I've read similar posts but I can't seem to solve my problem. I have added all my activities to androidManifest file but cannot navigate from Second Activity to ThirdActivity with Intent.

Here is MainActivity.java

package com.mobi.crazycalc;

  import android.os.Bundle;
  import android.os.Handler;
  import android.app.Activity;
  import android.content.Intent;
  import android.view.Menu;

  public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            Intent in= new Intent(MainActivity.this,SecondActivity.class);
            MainActivity.this.startActivity(in);
            MainActivity.this.finish();
        }
    }, 1000);
}



@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
 }

 }

      

        
        
        
      

    

here SecondActivity.java

package com.mobi.crazycalc;

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

public class SecondActivity extends Activity {
EditText name1;
EditText name2;
Button goButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);
    name1= (EditText) findViewById(R.id.name1);
    name2=(EditText) findViewById(R.id.name2);
    goButton= (Button) findViewById(R.id.gobutton);
    final String hisName=name1.getText().toString().trim();
    final String herName=name2.getText().toString().trim();
    goButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub

            Love lv=new Love();
            int result=lv.getLovePer(hisName, herName);
            Intent in=new Intent(SecondActivity.this,ThirdActivity.class);
            in.putExtra("Result", result);
            startActivity(in);

        }
    });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.second, menu);
    return true;
     }

    }

      

        
        
        
      

    

This is where ThirdActivity.java is located

package com.mobi.crazycalc;

import java.util.Random;

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

public class ThirdActivity extends Activity {
 TextView meter;
 Button goBackButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_third);
    meter = (TextView) findViewById(R.id.meter);
    goBackButton = (Button) findViewById(R.id.gobackbutton);
    goBackButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent in=new Intent(ThirdActivity.this,SecondActivity.class);
            startActivity(in);
        }
    });
    Random ran= new Random();
    for(int i=0;i<100;++i)
    {
        int ranNo=ran.nextInt(100);
        meter.setText(ran.toString());
    }
Bundle bund=getIntent().getExtras();
int res=bund.getInt("Result");

    meter.setText(res);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.third, menu);
    return true;
}

}

      

        
        
        
      

    

this is the manifest file -

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mobi.crazycalc"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="17" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.mobi.crazycalc.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.mobi.crazycalc.SecondActivity"
        android:label="@string/title_activity_second" >
    </activity>
    <activity
        android:name="com.mobi.crazycalc.ThirdActivity"
        >
    </activity>
</application>

</manifest>

      

        
        
        
      

    

Activity-second.xml:

RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#e52850"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".SecondActivity" >

<EditText
    android:id="@+id/name1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="57dp"
    android:ems="10"
    android:hint="@string/name1Edittext"
    android:textColor="@color/almond" >

    <requestFocus />
</EditText>

<Button
    android:id="@+id/gobutton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/name2"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="30dp"
    android:background="@android:color/transparent"
    android:text="@string/buttontext"
    android:textColor="@color/aeroBlue" />

<EditText
    android:id="@+id/name2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/name1"
    android:layout_below="@+id/name1"
    android:layout_marginTop="41dp"
    android:ems="10"
    android:hint="@string/name2Edittext"
    android:textColor="@color/almond" />

</RelativeLayout>