Add AdbTest sample program

This sample implements the "adb logcat" command using USB host APIs.

Change-Id: Ifbf122e99358bd3a1cd2a7967c364ffd59f003b3
Signed-off-by: Mike Lockwood <lockwood@android.com>

samples/USB/AdbTest/src/com/android/adb/AdbSocket.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2011 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 com.android.adb;
+
+/* This class represents an adb socket.  adb supports multiple independent
+ * socket connections to a single device.  Typically a socket is created
+ * for each adb command that is executed.
+ */
+public class AdbSocket {
+
+    private final AdbDevice mDevice;
+    private final int mId;
+    private int mPeerId;
+
+    public AdbSocket(AdbDevice device, int id) {
+        mDevice = device;
+        mId = id;
+    }
+
+    public int getId() {
+        return mId;
+    }
+
+    public boolean open(String destination) {
+        AdbMessage message = new AdbMessage();
+        message.set(AdbMessage.A_OPEN, mId, 0, destination);
+        if (! message.write(mDevice)) {
+            return false;
+        }
+
+        synchronized (this) {
+            try {
+                wait();
+            } catch (InterruptedException e) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public void handleMessage(AdbMessage message) {
+        switch (message.getCommand()) {
+            case AdbMessage.A_OKAY:
+                mPeerId = message.getArg0();
+                synchronized (this) {
+                    notify();
+                }
+                break;
+            case AdbMessage.A_WRTE:
+                mDevice.log(message.getDataString());
+                sendReady();
+                break;
+        }
+    }
+
+    private void sendReady() {
+        AdbMessage message = new AdbMessage();
+        message.set(AdbMessage.A_OKAY, mId, mPeerId);
+        message.write(mDevice);
+    }
+}