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java.lang.IllegalStateException: Target host must not be null, or set in parameters. scheme=null, host=null, path=localhost/Navigation/connect.php	at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:591)	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:293)	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)	at com.example.navigation.Login$1LoginAsync.doInBackground(Login.java:93)	at com.example.navigation.Login$1LoginAsync.doInBackground(Login.java:1)	at android.os.AsyncTask$2.call(AsyncTask.java:288)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)	at java.lang.Thread.run(Thread.java:841)