使 Java Runnable 持续运行
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Make Java Runnable run continuously
提问by quarks
How to make a classthat implements a java.lang.Runnableinterface to run continuously without blocking the whole application.
如何让一个class实现了java.lang.Runnable接口的程序在不阻塞整个应用程序的情况下连续运行。
For example:
例如：
private void startHandler(UsbDevice d) {
if (mLoop != null) {
mConnectionHandler.onErrorLooperRunningAlready();
return;
}
mLoop = new UsbRunnable(d);
mUsbThread = new Thread(mLoop);
mUsbThread.start();
}
Need to make the mLoop's run() method to run continuously. UsbRunnable implements the Runnable interface.
需要使mLoop的 run() 方法连续运行。 UsbRunnable 实现了 Runnable 接口。
回答by Andreas Fester
How to make a class that implements a java.lang.Runnable interface to run continuously without blocking the whole application.
如何让一个实现了 java.lang.Runnable 接口的类在不阻塞整个应用程序的情况下连续运行。
You need two things:
你需要两件事：
- A loop inside the
run()method - A call which blocks, usually by communicating with your device
run()方法内部的循环- 通常通过与您的设备通信来阻止的呼叫
public class USBRunnable implements Runnable {
public void run() {
while (isRunning) {
data = readFromUSBDevice(); // waits until data is available, returns the data read
processData(data);
}
}
}
回答by user1441664
Can have a while (true){......} Loop inside the run method of the class that implements runnable. Can mark this thread as deamon.
在实现 runnable 的类的 run 方法中可以有一个 while (true){......} 循环。可以将此线程标记为守护进程。
回答by T.J. Crowder
The typical way is to put a loop in run:
典型的方法是放入一个循环run：
public void run() {
while (!terminationCondition) {
// Do work
}
}
runshould model the total work the Runnableneeds to do, not just one iteration of that work. So if it needs to do repeated work until it's stopped, you use a loop to do exactly that.
run应该对Runnable需要做的全部工作进行建模，而不仅仅是该工作的一次迭代。因此，如果它需要重复工作直到停止，您可以使用循环来做到这一点。
