Question

我有2个处理程序，第一个处理程序获取IP，第二个尝试获取国家/地区代码。如果我知道IP，我可以执行第二个处理程序，则第二个是依赖的。但是，当我执行我的代码时，两个线程同时执行，我尝试使用myThread.join，但是行为却相同。

public class SplashScreen extends AppCompatActivity{                     
Handler handler = new Handler();                               
SharedPreferences settings;
@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash_screen);

    settings = this.getSharedPreferences("appInfo", 0);
    String ipAddress = settings.getString("ipAddress", null);

    if(ipAddress == null) {
        Runnable runnable = new IPAddressThread(handler, this); 
        handler.postDelayed(runnable, 5000);
        Thread thread = new Thread(runnable);
        thread.start();
    }
    String countryCode = settings.getString("countryCode", null);
    String storeNumber = settings.getString("storeNumber", null);

    if(countryCode == null || storeNumber == null) {
        Handler handlerStore= new Handler();
        Runnable runnableStore = new StoreDetailThread(handlerStore, this);
        handlerStore.postDelayed(runnableStore, 5000);
        Thread threadStore = new Thread(runnableStore);
        threadStore.start();
    } }

和可运行的实现：

public class IPAddressThread implements Runnable {

private Handler handler;
private SplashScreen settings;
IPAddressThread(Handler handler,  SplashScreen settings){
    this.handler=handler;
    this.settings=settings;
}

/**
 *
 */
@Override
public void run() {
    handler.postDelayed(this, 5000);
    String ip= NetworkDetails.getInstance().getIpAddress();
    if(ip!=null && !ip.isEmpty()){

        settings.setStoreFormat("ipAddress", ip);
        handler.removeCallbacks(this);
    }else{
        System.out.println("Searching....");
    }
}



public class StoreDetailThread  implements  Runnable{
private Handler handler;
private SplashScreen settings;
private String storeDetail;

/**
 * Class Constructor.
 *
 * @param handler
 * @param settings
 */
 public  StoreDetailThread(Handler handler, SplashScreen settings){
    this.handler=handler;
    this.settings=settings;
}


/**
 *
 */
@Override
public void run() {

    String host= NetworkDetails.getInstance().getHostNetwork();
    if(host.contains(PATTERN_FOR_STORE_NUMBER)) {

        try{
            String countryCode=storeDetail.substring(FIRST_POSITION_COUNTRY_CODE,LAST_POSITION_COUNTRY_CODE);
            String storeNumber=storeDetail.substring(FIRST_POSITION_STORE_NUMBER,LAST_POSITION_STORE_NUMBER);

            settings.setStoreFormat("countryCode", countryCode);
            settings.setStoreFormat("storeNumber", storeNumber);
            handler.removeCallbacks(this);

        }catch (IndexOutOfBoundsException exception){
            handler.postDelayed(this, 5000);
        }


    }else{
        handler.postDelayed(this, 5000);
    }


}

}

当第一个线程完成时如何调用第二个线程？

当其他处理程序已经完成时调用处理程序

0 个答案: