https://source.android.com/ 
/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package android.os;


The exception that is thrown when an application attempts
to perform a networking operation on its main thread.

This is only thrown for applications targeting the Honeycomb
SDK or higher.  Applications targeting earlier SDK versions
are allowed to do networking on their main event loop threads,
but it's heavily discouraged.  See the document

Designing for Responsiveness.

Also see StrictMode. 
/**
 * The exception that is thrown when an application attempts
 * to perform a networking operation on its main thread.
 *
 * <p>This is only thrown for applications targeting the Honeycomb
 * SDK or higher.  Applications targeting earlier SDK versions
 * are allowed to do networking on their main event loop threads,
 * but it's heavily discouraged.  See the document
 * <a href="{@docRoot}guide/practices/design/responsiveness.html">
 * Designing for Responsiveness</a>.
 *
 * <p>Also see {@link StrictMode}.
 */
public class NetworkOnMainThreadException extends RuntimeException {
}