Java.lang.IllegalArgumentException: Caracteres ilegales en esquema en el índice 0:

Tengo un error como este si se ejecuta en ics (para 2.3 corriendo bien):

03-01 10:15:58.217: E/AndroidRuntime(844): FATAL EXCEPTION: AsyncTask #5 03-01 10:15:58.217: E/AndroidRuntime(844): java.lang.RuntimeException: An error occured while executing doInBackground() 03-01 10:15:58.217: E/AndroidRuntime(844): at android.os.AsyncTask$3.done(AsyncTask.java:278) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 03-01 10:15:58.217: E/AndroidRuntime(844): at java.lang.Thread.run(Thread.java:856) 03-01 10:15:58.217: E/AndroidRuntime(844): Caused by: java.lang.IllegalArgumentException: Illegal character in scheme at index 0: http://localhost/android/data_janji.php?id_nasabah=40 03-01 10:15:58.217: E/AndroidRuntime(844): at java.net.URI.create(URI.java:727) 03-01 10:15:58.217: E/AndroidRuntime(844): at org.apache.http.client.methods.HttpGet.<init>(HttpGet.java:75) 03-01 10:15:58.217: E/AndroidRuntime(844): at com.mpegadaian.JSONParser.makeHttpRequest(JSONParser.java:109) 03-01 10:15:58.217: E/AndroidRuntime(844): at com.mpegadaian.DaftarJanjiActivity$LoadGadai.doInBackground(DaftarJanjiActivity.java:132) 03-01 10:15:58.217: E/AndroidRuntime(844): at com.mpegadaian.DaftarJanjiActivity$LoadGadai.doInBackground(DaftarJanjiActivity.java:1) 

Comprobé data_janji.php para ver si data_janji.php a través del navegador de forma, el resultado es muy bien:

 {"data_janji":[{"nama_brg":"ANTING ANTING 10GR","id_janji":"9","id_gadai":"23","tgl_janji":"01-March-2013","pesan":"tebus bsk"}]} 

¿Cómo arreglar esto?