public class MyActivity extends GDActivity{

protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setActionBarContentView(R.layout.main);
}

}

很简单的一个activity，但却启动不了，经过反复的查找原因终于找到解决办法

需要在AndroidManifest.xml中指定如下：

android:icon="@drawable/icon"
android:label="@string/app_name"
android:theme="@style/Theme.GDCatalog"
android:name="com.cvicse.hs.cbxt.cbcx.cApplication" >

android:name="com.cvicse.hs.main.MSAPROJECTActivity"
android:label="@string/app_name" >

还需要在cApplication 这个类中做以下修改：

package com.cvicse.hs.cbxt.cbcx;

import com.cvicse.hs.main.MSAPROJECTActivity;

import android.content.Intent;

import greendroid.app.GDApplication;

public class cApplication extends GDApplication {

@Override
public Class< > getHomeActivityClass() {
// TODO Auto-generated method stub
return MSAPROJECTActivity.class;
}

@Override
public Intent getMainApplicationIntent() {
// TODO Auto-generated method stub
Intent intent = new Intent(getApplicationContext(),MSAPROJECTActivity.class);
return intent;
}
}

问题即可解决