java - 在另一个线程中使用一个线程中生成的数据

Question

早上好，我的代码有问题我有一个线程根据按下的按钮生成一个数字，在另一个线程中我想检索这个值并通过一个方法发送它，但我无法恢复这个值它总是重置为零我可以在线程之间共享这个值吗

第一个线程生成数据值：

Thread coletaDados = new Thread(new Runnable() {
    @Override
    public void run() {

                try {
                    while (true) {

                        dados = avancaEE + sobe + desce + avancaED + recuaED + recuaEE;

                     //   Log.i("Thread Dados", "Valor dos Dados" + dados);
                        Thread.sleep(100);
                    }
                }catch (InterruptedException e) {

                }
            }
        });

        coletaDados.start();


public class ThreadEnvio extends Thread {

byte[] EnvioManual = new byte[10];
ChecksumSend checksumSend = new ChecksumSend();
private  int Dados;
SerialPortManager spManager;
InseticidaManualFragment inseticidaManualFragment = new InseticidaManualFragment();

第二个线程使用数据值：

public ThreadEnvio()
{
//    this.Dados = dados;
    spManager = SerialPortManager.getInstances();
}

@Override
public void run() {
    try {
        while (true) {

            Dados = inseticidaManualFragment.dados;
            //Dados = inseticidaManualFragment.dados;

            Log.d("Pressed", "dados" + Dados);

            EnvioManual[0] = (0x04);
            EnvioManual[1] = (0x10);
            EnvioManual[2] = (0x00);
            EnvioManual[3] = (0x00);
            EnvioManual[4] = (byte) 0xff;
            EnvioManual[5] = (0x00);
            EnvioManual[6] = (0x02);
            EnvioManual[7] = (byte) (Dados >> 8);
            EnvioManual[8] = (byte) (Dados & 0xff);
            EnvioManual[9] = checksumSend.Calculachecksum(EnvioManual);

            send(EnvioManual);

         //   Log.d("Saida", "Enviando" + toHexString(EnvioManual));
            Thread.sleep(100);
        }

    }
    catch (InterruptedException e) {
    }
}

public void send (byte[] x ){
    spManager.send(SerialPortManager.ttyS0,true,":" + toHexString(x) + "\r\n");
}
public static String toHexString(byte[] bytes){
    char[] hexArray = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
    char[] hexChars = new char[bytes.length*2];
    int v;
    for(int j=0;j<bytes.length;j++){
        v = bytes[j] & 0xFF;
        hexChars[j*2] = hexArray[v/16];
        hexChars[j*2 + 1] = hexArray[v%16];
    }
    return new String(hexChars);
}

}

标签： javaandroidmultithreading

Answer 1

我认为使用共享对象跨线程共享数据的最佳方式，其中一个线程将设置值，其他线程将检索。

这样，您可以对共享对象进行同步，以避免经典的读写器问题。