새로 만든 application test1,test2 두개가 있습니다.

test1 application에서 test2 application을 호출하고 싶습니다.
intent.java에 추가 해도 호출이 안됩니다.
어떻게 해야 하나요??

아래는 소스입니다.
====================================================
package com.test1;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class test1 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
      Intent intent = new Intent(Intent.ACTION_TEST_CALLED);
      startActivity(intent);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.test1"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".test1"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-sdk android:minSdkVersion="3" />
</manifest> 
====================================================================
test2 application

package com.test2;

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

public class test2 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.test2"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".test2"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="com.test2.called" />
            </intent-filter>
        </activity>
    </application>
    <uses-sdk android:minSdkVersion="3" />
</manifest>
=================================================================
\frameworks\base\core\java\android\content\Intent.java에 아래와 같이 정의 했습니다.
    public static final String ACTION_TEST_CALLED = "com.test2.called";