我想使用CyberGarage“CyberLink for Java”API为Android编写UPnP控制点应用程序。为了测试API,我实现了一个非常简单的应用程序。在此应用程序中,UPnP控制点主动搜索任何UPnP根设备,侦听响应和设备通知,并打印网络上可用设备的列表。适用于Android的使用CyberGarage的简单UPnP/DLNA控制点CyberLink for Java
该应用在Android手机上运行,但没有找到我网络上的UPnP设备。我在两款不同的Android手机上尝试了这一点。要检查这是否是Android特定的问题,我实现了与Java控制台应用程序相同的功能。有趣的是,Java控制台应用程序工作得很好,并且始终显示我的网络上的所有UPnP设备!
那么为什么这不适用于Android?请注意,在Android应用程序中,我必须使用AsyncTask在独立线程上实现网络特定功能。否则,我会得到错误,因为我不应该在UI线程上运行它。但是这不应该是问题,我是对的吗?
下面的两个应用程序的源代码。
Android应用程序:
MainActivity.java
package com.example.controller_v1;
import org.cybergarage.upnp.DeviceList;
import org.cybergarage.upnp.UPnP;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Process;
import android.util.Log;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
UPnP.setEnable(UPnP.USE_ONLY_IPV4_ADDR);
new StartControlPointTask().execute();
}
private class StartControlPointTask extends AsyncTask {
public static final String TAG = "StartControlPointTask";
@Override
protected Object doInBackground(Object... params) {
Process.setThreadPriority(Process.THREAD_PRIORITY_FOREGROUND);
MyControlPoint controlPoint = new MyControlPoint();
controlPoint.start();
// controlPoint.search();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
DeviceList rootDevices = controlPoint.getDeviceList();
int numDevices = rootDevices.size();
if (numDevices > 0) {
for (int i = 0; i < numDevices; i++) {
Log.i(TAG, "device " + i + ": " + rootDevices.getDevice(i).getFriendlyName());
}
} else {
Log.i(TAG, "no root devices found");//
}
return null;
}
}
}
MyControlPoint.java
package com.example.controller_v1;
import org.cybergarage.upnp.ControlPoint;
import org.cybergarage.upnp.device.NotifyListener;
import org.cybergarage.upnp.device.SearchResponseListener;
import org.cybergarage.upnp.ssdp.SSDPPacket;
import android.util.Log;
public class MyControlPoint extends ControlPoint implements NotifyListener, SearchResponseListener {
public MyControlPoint() {
addNotifyListener(this);
addSearchResponseListener(this);
}
@Override
public void deviceNotifyReceived(SSDPPacket ssdpPacket) { // NotifyListener
final String TAG = "deviceNotifyReceived";
Log.i(TAG, "executed");
}
@Override
public void deviceSearchResponseReceived(SSDPPacket ssdpPacket) { // SearchResponseListener
final String TAG = "deviceSearchResponseReceived";
Log.i(TAG, "executed");
}
}
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.controller_v1"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.controller_v1.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Java控制台应用程序:
Main.java
import org.cybergarage.upnp.DeviceList;
import org.cybergarage.upnp.UPnP;
public class Main {
public Main() {
UPnP.setEnable(UPnP.USE_ONLY_IPV4_ADDR);
MyControlPoint controlPoint = new MyControlPoint();
controlPoint.start();
// controlPoint.search();
try {
Thread.sleep(5000); // wait for devices to be found
} catch (InterruptedException e) {
e.printStackTrace();
}
DeviceList rootDevices = controlPoint.getDeviceList();
int numDevices = rootDevices.size();
if (numDevices > 0) {
for (int i = 0; i < numDevices; i++) {
System.out.println("found device " + i + ": " + rootDevices.getDevice(i).getFriendlyName());
}
} else {
System.out.println("no root devices found");
}
}
public static void main(String[] args) {
new Main();
}
}
MyControlPoint.java
import org.cybergarage.upnp.ControlPoint;
import org.cybergarage.upnp.device.NotifyListener;
import org.cybergarage.upnp.device.SearchResponseListener;
import org.cybergarage.upnp.ssdp.SSDPPacket;
public class MyControlPoint extends ControlPoint implements /*DeviceChangeListener,*/ NotifyListener, SearchResponseListener {
public MyControlPoint() {
addNotifyListener(this);
addSearchResponseListener(this);
}
@Override
public void deviceNotifyReceived(SSDPPacket packet) { // NotifyListener
System.out.println("deviceNotifyReceived");
}
@Override
public void deviceSearchResponseReceived(SSDPPacket packet) { // SearchResponseListener
System.out.println("deviceSearchReceived");
}
}
我没有任何想法,为什么Java控制台应用程序的工作原理及Android应用程序没有。我没有从文档中得到任何答案。有谁能够帮助我?
您的AndroidManifest.xml中是否已启用网络权限?另一个可能的原因:如果您的设备配置为使用IPv6,则强制使用IPv4地址,而不是您的地址;) – Andreas