Question

我有一个来自父级calss的活动继承。现在，当我离开clild活动时，我需要关闭父级的线程。我不知道该怎么做。

这是我的基础课。

public abstract class SerialPortActivity extends Activity {
 public class ReadThread extends Thread {
    @Override
    public void run() {
        super.run();
        while(!isInterrupted()) {
            int size;
            try {
                if (mInputStream == null) return;
                size = mInputStream.read(buffer);
                if (size > 0) {
                    onDataReceived(buffer, size);
                }
            } catch (IOException e) {
                e.printStackTrace();
                return;
            }
        }
    }
}
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mApplication = (Application) getApplication();
    try {
        mSerialPort = mApplication.getSerialPort();
        mOutputStream = mSerialPort.getOutputStream();
        mInputStream = mSerialPort.getInputStream();
        /* Create a receiving thread */
        mReadThread = new ReadThread();
        mReadThread.start();
    } catch (SecurityException e) {
        DisplayError(R.string.error_security);
    } catch (IOException e) {
        DisplayError(R.string.error_unknown);
    } catch (InvalidParameterException e) {
        DisplayError(R.string.error_configuration);
    }
}
protected abstract void onDataReceived(final byte[] buffer, final int size);

@Override
protected void onDestroy() {
    if (mReadThread != null)
        mReadThread.interrupt();
    mApplication.closeSerialPort();
    mSerialPort = null;
    super.onDestroy();
 }
}

这是我的子类。

public class ConsoleActivity extends SerialPortActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.console);
}
@Override
protected void onDataReceived(final byte[] buffer, final int size) {
    totalSize += size;

    if(totalSize>=8996){
        analysis();
    }else{
        for(int temp = 0 ; temp < size ; temp++){
            totalbyteArray[countTotalByte] = buffer[temp];
            countTotalByte++;
        }
    }
}

我要在退出ConsoleActivity时关闭mReadThread。重新启动ConsoleActivity时，mReadThread将一起重新启动。我该怎么办？

Answer 1

在echo sortit("MLH"); // output LMH类中，为SerialPortActivity添加参考，如下所示：

ReadThread

然后，在子类中，您可以访问public ReadThread mReadThread;，并且对于句柄生命周期，您必须重写mReadThread和onStart方法。像这样：

onStop

更多：最好在父类中编写一种初始化@Override public void onStart() { super.onStart(); if (mReadThread != null) { mReadThread.start(); } } @Override public void onStop() { super.onStop(); if (mReadThread != null) { mReadThread.interrupt(); } }的方法，在某些情况下，如果启动线程时mReadThread对象为null，则可以调用该方法。像这样的东西：

mReadThread

然后在public void init() { mReadThread = new ReadThread(); mReadThread.start() }中，您可以编写：

onStart

如何在父类中强制关闭线程

1 个答案: