我有一个关于类/任务/活动的新手问题。由于我是从C语言转过来,所以不确定我想要做的是否是一个好方法。
我创建了一个类:
public class UDPServer {
private MyDatagramReceiver myDatagramReceiver = null;
private static int MAX_UDP_DATAGRAM_LEN = 1024;
private static int UDP_SERVER_PORT = 5000;
public void start() {
myDatagramReceiver = new MyDatagramReceiver();
myDatagramReceiver.start();
}
public void kill() {
myDatagramReceiver.kill();
}
private class MyDatagramReceiver extends Thread {
private boolean bKeepRunning = true;
private String lastMessage = "";
public void run() {
String message;
byte[] lmessage = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket packet = new DatagramPacket(lmessage, lmessage.length);
DatagramSocket socket = null;
try
{
socket = new DatagramSocket(UDP_SERVER_PORT);
while(bKeepRunning)
{
socket.receive(packet);
message = new String(lmessage, 0, packet.getLength());
lastMessage = message;
//Here should call activity method
});
}
}
catch (Throwable e)
{
e.printStackTrace();
}
finally
{
if (socket != null)
{
socket.close();
}
}
}
public void kill() {
bKeepRunning = false;
}
}
}
在我的Activity中,我有:
@Override
public void onResume() {
super.onResume();
mUDPServer = new UDPServer();
mUDPServer.start();
}
@Override
public void onPause() {
super.onPause();
mUDPServer.kill();
}
现在,每次我收到一个数据包,我希望这个线程/类将接收到的数据包传递给一个活动方法来处理(进行一些计算或更新一些UI等)。但是我不知道如何做到这一点,也许我的方法不正确。我可以将线程代码放在活动中,但这似乎会使代码变得不太可读。
有什么建议吗?
@Anshul Jain 代码更新:
public class Main_activity extends Activity implements Interface_UDPServer{
TextView recived_message;
UDPServer mUDPServer;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
recived_message = (TextView)findViewById(R.id.recived_message);
}
@Override
public void onResume() {
super.onResume();
mUDPServer = new UDPServer(this);
mUDPServer.start();
}
@Override
public void onPause() {
super.onPause();
mUDPServer.kill();
}
public void sendData(final String str){
runOnUiThread(new Runnable() {
@Override
public void run() {
recived_message.setText(str);
}
});
}
}
XML文件
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="@+id/linearLayout"
android:layout_alignLeft="@+id/linearLayout"
android:layout_alignStart="@+id/linearLayout">
<TextView
android:id="@+id/recived_message"
android:layout_width="200dp"
android:layout_height="35dp"
android:textColor="#444444"
android:textSize="20dp" />
</LinearLayout>
</RelativeLayout>