Create network change notifier.

talk/app/webrtc/java/jni/androidnetworkmonitor_jni.cc

+/*
+ * libjingle
+ * Copyright 2015 Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/app/webrtc/java/jni/androidnetworkmonitor_jni.h"
+
+#include "webrtc/base/common.h"
+#include "talk/app/webrtc/java/jni/classreferenceholder.h"
+#include "talk/app/webrtc/java/jni/jni_helpers.h"
+
+namespace webrtc_jni {
+jobject AndroidNetworkMonitor::application_context_ = nullptr;
+
+// static
+void AndroidNetworkMonitor::SetAndroidContext(JNIEnv* jni, jobject context) {
+  if (application_context_) {
+    jni->DeleteGlobalRef(application_context_);
+  }
+  application_context_ = NewGlobalRef(jni, context);
+}
+
+AndroidNetworkMonitor::AndroidNetworkMonitor()
+    : j_network_monitor_class_(jni(),
+                               FindClass(jni(), "org/webrtc/NetworkMonitor")),
+      j_network_monitor_(
+          jni(),
+          jni()->CallStaticObjectMethod(
+              *j_network_monitor_class_,
+              GetStaticMethodID(
+                  jni(),
+                  *j_network_monitor_class_,
+                  "init",
+                  "(Landroid/content/Context;)Lorg/webrtc/NetworkMonitor;"),
+              application_context_)) {
+  ASSERT(application_context_ != nullptr);
+  CHECK_EXCEPTION(jni()) << "Error during NetworkMonitor.init";
+}
+
+void AndroidNetworkMonitor::Start() {
+  RTC_CHECK(thread_checker_.CalledOnValidThread());
+  jmethodID m =
+      GetMethodID(jni(), *j_network_monitor_class_, "startMonitoring", "(J)V");
+  jni()->CallVoidMethod(*j_network_monitor_, m, jlongFromPointer(this));
+  CHECK_EXCEPTION(jni()) << "Error during NetworkMonitor.startMonitoring";
+}
+
+void AndroidNetworkMonitor::Stop() {
+  RTC_CHECK(thread_checker_.CalledOnValidThread());
+  jmethodID m =
+      GetMethodID(jni(), *j_network_monitor_class_, "stopMonitoring", "(J)V");
+  jni()->CallVoidMethod(*j_network_monitor_, m, jlongFromPointer(this));
+  CHECK_EXCEPTION(jni()) << "Error during NetworkMonitor.stopMonitoring";
+}
+
+JOW(void, NetworkMonitor_nativeNotifyConnectionTypeChanged)(
+    JNIEnv* jni, jobject j_monitor, jlong j_native_monitor) {
+  rtc::NetworkMonitorInterface* network_monitor =
+      reinterpret_cast<rtc::NetworkMonitorInterface*>(j_native_monitor);
+  network_monitor->OnNetworksChanged();
+}
+
+}  // namespace webrtc_jni