[英]How can I run a java.class from Main Activity
我是 Android Development 的初学者,希望有人能帮助我。
我想连接到本地服务器 (IP)。 我在 GitHub 中找到了一个代码,据说可以进行这种连接。 但问题是这是一个java.class
而不是我的MainActivity
。 所以当我现在在模拟器中运行我的应用程序时,什么也没有发生。 如何从我的MainActivity
中运行Java.class
?
这里是来源: https://github.com/calimero-project/introduction/tree/master/src/main/java
Class:
public class CreateTunnelingLink
{
/**
* Local endpoint, replace the IP address with your actual address. The local socket address is important for
* multi-homed clients (several network interfaces), or if the address via InetAddress.getLocalHost is not useful.
*/
private static final InetSocketAddress local = new InetSocketAddress("192.168.10.13", 3671);
/**
* Specifies the KNXnet/IP server to access the KNX network, insert your server's actual host name or IP address,
* e.g., "192.168.1.20". The default port is where most servers listen on for new connection requests.
*/
private static final InetSocketAddress server = new InetSocketAddress("myKnxServer.myHome",
KNXnetIPConnection.DEFAULT_PORT);
public static void main(final String[] args)
{
System.out.println("This example establishes a tunneling connection to the KNXnet/IP server " + server);
// A KNX tunneling link supports NAT (Network Address Translation) if required.
// We also indicate that the KNX installation uses twisted-pair (TP) medium, with TP1 being the most common.
// KNXNetworkLink is the base interface implemented by all supported Calimero links to a KNX network.
try (KNXNetworkLink knxLink = KNXNetworkLinkIP.newTunnelingLink(local, server, false, TPSettings.TP1)) {
System.out.println("Connection established to server " + knxLink.getName());
System.out.println("Close connection again");
}
catch (KNXException | InterruptedException e) {
// KNXException: all Calimero-specific checked exceptions are subtypes of KNXException
// InterruptedException: longer tasks that might block are interruptible, e.g., connection procedures. In
// such case, an instance of InterruptedException is thrown.
// If a task got interrupted, Calimero will clean up its internal state and resources accordingly.
// Any deviation of such behavior, e.g., where not feasible, is documented in the Calimero API.
System.out.println("Error creating KNXnet/IP tunneling link: " + e);
}
}
}
主要活动:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
尝试这个
public class MainActivity extends AppCompatActivity {
private static final InetSocketAddress local = new InetSocketAddress("192.168.10.13", 3671);
private static final InetSocketAddress server = new InetSocketAddress("myKnxServer.myHome",
KNXnetIPConnection.DEFAULT_PORT);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// call your method to do the task
yourMethodForMakingConnection();
}
// for better separation you can create a method for this task
private void yourMethodForMakingConnection() {
System.out.println("This example establishes a tunneling connection to the KNXnet/IP server " + server);
// A KNX tunneling link supports NAT (Network Address Translation) if required.
// We also indicate that the KNX installation uses twisted-pair (TP) medium, with TP1 being the most common.
// KNXNetworkLink is the base interface implemented by all supported Calimero links to a KNX network.
try (KNXNetworkLink knxLink = KNXNetworkLinkIP.newTunnelingLink(local, server, false, TPSettings.TP1)) {
System.out.println("Connection established to server " + knxLink.getName());
System.out.println("Close connection again");
}
catch (KNXException | InterruptedException e) {
// KNXException: all Calimero-specific checked exceptions are subtypes of KNXException
// InterruptedException: longer tasks that might block are interruptible, e.g., connection procedures. In
// such case, an instance of InterruptedException is thrown.
// If a task got interrupted, Calimero will clean up its internal state and resources accordingly.
// Any deviation of such behavior, e.g., where not feasible, is documented in the Calimero API.
System.out.println("Error creating KNXnet/IP tunneling link: " + e);
}
}
}
如果代码正确,这应该可以工作。 将您的Activities
的onCreate
function 视为主要的 function。 对于这么小的任务,您不需要另一个 class。
否则,您也可以在MainActivity
的onCreate
方法中创建该 class 的实例,然后调用从该 class 与 object 建立连接的main
方法。
无论哪种方式,您都可以做到。
您可以了解更多关于Android Development 、 Activity和Android Activity 生命周期的基础知识,以便您更好地理解这一点。
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