[android help] android.content.ActivityNotFoundException, unable to start activity

I am not sure what you are trying to do.

But a couple of suggestions to try.

    package="com.eco4cloud.activities" // make sure package name is right

Mention the package name as above

            android:name="com.eco4cloud.activities.Main" 
        // this probably MainActivity. Cross Check once
        android:label="@string/app_name" >
        
            
            
        
         

Since you have explicit intent you don't require a intent-filter

      // use this assuming Datacenters is in package com.eco4cloud.activities
              android:name=".Datacenters" 
        android:label="@string/app_name" >
    

If you are starting a activity in a non-activity class

     public void startDatacenters() {
     Intent intent = new Intent(context, Datacenters.class);
     // assuming context is the activity content  
     context.startActivity(intent);
     //in your case you have activity.startActivity(intent)
     // not sure what activity is 
    }

.

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