Port QtBluetooth to Android

This is a feature merge to dev targeting Qt 5.3.

Known issues:
-QTBUG-36754: QBluetoothServer::close() crashes
-QTBUG-36763: QBluetothTransferManager port to Android not possible
-QTBUG-36764: Improve QBluetoothLocalDevice::connectedDevices()
-QTBUG-36810: Remove direct use of Android action strings

The above issues and some other minor TODO's will be addressed
until final release time.

Task-number: QTBUG-33792

[ChangeLog][QtBluetooth][Android] QtBluetooth has been ported to
Android.

Change-Id: I31ba83e3b7d6aa68e7258b7e43235de7d1a6e68a
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>

1 files changed, 150 insertions, 0 deletions

diff --git a/src/bluetooth/android/inputstreamthread.cpp b/src/bluetooth/android/inputstreamthread.cpp
new file mode 100644
index 00000000..df32ee62
--- /dev/null
+++ b/src/bluetooth/android/inputstreamthread.cpp
@@ -0,0 +1,150 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Lauri Laanmets (Proekspert AS) <lauri.laanmets@eesti.ee>
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtBluetooth module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtAndroidExtras/QAndroidJniEnvironment>
+
+#include "android/inputstreamthread_p.h"
+#include "qbluetoothsocket_p.h"
+
+QT_BEGIN_NAMESPACE
+
+
+InputStreamThread::InputStreamThread(QBluetoothSocketPrivate *socket)
+    : QThread(), m_stop(false)
+{
+    m_socket_p = socket;
+}
+
+void InputStreamThread::run()
+{
+    qint32 byte;
+    Q_UNUSED(byte)
+    while (1) {
+        {
+            QMutexLocker locker(&m_mutex);
+            if (m_stop)
+                break;
+        }
+        readFromInputStream();
+    }
+
+    QAndroidJniEnvironment env;
+    if (m_socket_p->inputStream.isValid())
+        m_socket_p->inputStream.callMethod<void>("close");
+
+    if (env->ExceptionCheck()) {
+        env->ExceptionDescribe();
+        env->ExceptionClear();
+    }
+}
+
+bool InputStreamThread::bytesAvailable() const
+{
+    QMutexLocker locker(&m_mutex);
+    return m_socket_p->buffer.size();
+}
+
+//This runs inside the thread.
+void InputStreamThread::readFromInputStream()
+{
+    QAndroidJniEnvironment env;
+
+    int bufLen = 1000; // Seems to magical number that also low-end products can survive.
+    jbyteArray nativeArray = env->NewByteArray(bufLen);
+
+
+    jint ret = m_socket_p->inputStream.callMethod<jint>("read", "([BII)I", nativeArray, 0, bufLen);
+
+    if (env->ExceptionCheck() || ret < 0) {
+        if (env->ExceptionCheck()) {
+            env->ExceptionDescribe();
+            env->ExceptionClear();
+        }
+        env->DeleteLocalRef(nativeArray);
+        QMutexLocker lock(&m_mutex);
+        m_stop = true;
+
+        /*
+         * We cannot distinguish IOException due to valid closure or due to other error
+         * Therefore we always have to throw an error and a disconnect signal
+         * A genuine disconnect wouldn't need the error signal.
+         * For now we always signal error which implicitly emits disconnect() too.
+         */
+
+        emit error();
+        return;
+    }
+
+    if (ret == 0) {
+        qDebug() << "Nothing to read";
+        env->DeleteLocalRef(nativeArray);
+        return;
+    }
+
+    QMutexLocker lock(&m_mutex);
+    char *writePtr = m_socket_p->buffer.reserve(bufLen);
+    env->GetByteArrayRegion(nativeArray, 0, ret, reinterpret_cast<jbyte*>(writePtr));
+    env->DeleteLocalRef(nativeArray);
+    m_socket_p->buffer.chop(bufLen - ret);
+    emit dataAvailable();
+}
+
+void InputStreamThread::stop()
+{
+    QMutexLocker locker(&m_mutex);
+    m_stop = true;
+}
+
+qint64 InputStreamThread::readData(char *data, qint64 maxSize)
+{
+    QMutexLocker locker(&m_mutex);
+
+    if (m_stop)
+        return -1;
+
+    if (!m_socket_p->buffer.isEmpty())
+        return m_socket_p->buffer.read(data, maxSize);
+
+    return 0;
+}
+
+QT_END_NAMESPACE