Java 如何在多个活动中使用连接的线程
我是Android的新手。首先,我编写了一个应用程序,它通过蓝牙连接到另一个设备,然后使用套接字和连接的线程发送和接收数据。当使用一个活动时,一切都很好,我使用处理程序接收数据。 然后我开始创建一个包含多个活动的应用程序,所以我为套接字连接和连接线程创建了一个特殊的类。我通常从任何活动发送数据,但我不知道如何接收答案,如何在许多活动中创建处理程序,或者使用什么替代方法。你能帮我写这行代码吗,我应该加上 谢谢 这是我的帖子:Java 如何在多个活动中使用连接的线程,java,android,multithreading,sockets,bluetooth,Java,Android,Multithreading,Sockets,Bluetooth,我是Android的新手。首先,我编写了一个应用程序,它通过蓝牙连接到另一个设备,然后使用套接字和连接的线程发送和接收数据。当使用一个活动时,一切都很好,我使用处理程序接收数据。 然后我开始创建一个包含多个活动的应用程序,所以我为套接字连接和连接线程创建了一个特殊的类。我通常从任何活动发送数据,但我不知道如何接收答案,如何在许多活动中创建处理程序,或者使用什么替代方法。你能帮我写这行代码吗,我应该加上 谢谢 这是我的帖子: private class ConnectedThread extend
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
}
catch (IOException e) {}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[256];
int bytes;
while(true) {
try {
bytes = mmInStream.read(buffer);
byte[] readBuf = (byte[]) buffer;
String strIncom = new String(readBuf, 0, bytes);
// Here I need some method to send data to activity
}
catch (IOException e) {
break;
}
}
}
public void write(String message) {
byte[] msgBuffer = message.getBytes();
try {
mmOutStream.write(msgBuffer);
} catch (IOException e) {
}
}
}嗯,你可以做的一件事就是使用一个接口,例如:
public class ConnectedThread extends Thread {
// You declare your interface in the Class body
public static interface CallBackListener
{
public void onReceived(String msg);
}
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
private CallBackListener listener = null;
// then, those who want to use this class must implement
// this interface
public ConnectedThread(BluetoothSocket socket, CallBackListener aListener)
{
this.listener = aListener;
...
在线程的run方法中,您可以这样做:
// Here I need some method to send data to activity
if (listener != null)
{
listener.onReceived(strIncom);
}
BluetoothSocket socket = null;
/*
* Create the BlueToothSocket here
BluetoothSocket socket = new BluetoothSocket(...);
*/
ConnectedThread conThread = new ConnectedThread(socket, new ConnectedThread.CallBackListener()
{
@Override
public void onReceived(String msg)
{
// here you'll receive the string msg
// keep in mind that you receive this call
// in the ConnectedThread's context, not the UI thread
}
});
创建类时,请执行以下操作:
// Here I need some method to send data to activity
if (listener != null)
{
listener.onReceived(strIncom);
}
BluetoothSocket socket = null;
/*
* Create the BlueToothSocket here
BluetoothSocket socket = new BluetoothSocket(...);
*/
ConnectedThread conThread = new ConnectedThread(socket, new ConnectedThread.CallBackListener()
{
@Override
public void onReceived(String msg)
{
// here you'll receive the string msg
// keep in mind that you receive this call
// in the ConnectedThread's context, not the UI thread
}
});