为什么我的服务没有运行？（通过显示Toast消息来判断。）

发布于 2024-11-26 10:47:35 字数 810 浏览 2 评论 0原文

我正在尝试在后台创建一项服务，以便我可以运行一个循环，每 x 分钟请求一个页面。这是清单中的我的服务：

<service android:name=".webToSMS" android:enabled="true" />

这是我正在启动的服务（在主要活动中）：

Intent intent = new Intent(this, webToSMS.class);
startService(intent);

最后，这是我的服务类：

public class webToSMS extends IntentService {

  public webToSMS() {
      super("webToSMS");
  }

  @Override
  protected void onHandleIntent(Intent intent) {
      Context context = getApplicationContext();
      CharSequence text = "Hello toast!";
      int duration = Toast.LENGTH_SHORT;

      Toast toast = Toast.makeText(context, text, duration);
      toast.show();
  }
}

我正在遵循 Android 的指南，这就是它告诉我要做的事情。我期待的是弹出一个祝酒词“Hello toast！”当该服务运行时。最终，当这个工作正常时，我将放置一个循环，每 x 分钟请求一个页面。

原文

I am trying to make a service in the background so I can run a loop that requests a page every x minutes. This is my service in the manifest:

<service android:name=".webToSMS" android:enabled="true" />

And here is my service being started (in the main activity):

Intent intent = new Intent(this, webToSMS.class);
startService(intent);

And finally, this is my service class:

public class webToSMS extends IntentService {

  public webToSMS() {
      super("webToSMS");
  }

  @Override
  protected void onHandleIntent(Intent intent) {
      Context context = getApplicationContext();
      CharSequence text = "Hello toast!";
      int duration = Toast.LENGTH_SHORT;

      Toast toast = Toast.makeText(context, text, duration);
      toast.show();
  }
}

I was following the guide at Android and this is what it told me to do. What I am expecting is a toast to pop up saying "Hello toast!" when this service is run. Eventually when this works I will put a loop which will request a page every x minutes.

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〆凄凉。 2024-12-03 10:47:35

您的服务正在运行，只是没有显示 toast，因为您不在 UI 线程上。

如果你想看吐司试试这个

Handler HN = new Handler(); 


private class DisplayToast implements Runnable {

  String TM = "";

      public DisplayToast(String toast){
          TM = toast; 
      }

      public void run(){
         Toast.makeText(getApplicationContext(), TM, Toast.LENGTH_SHORT).show();
      }
}

@Override
protected void onHandleIntent(Intent intent) {

   HN.post(new DisplayToast("New Toast on UI Thread")); 
}

Your service is running, it's just not displaying the toast because you are not on the UI thread.

If you want to see a toast try this instead

Handler HN = new Handler(); 


private class DisplayToast implements Runnable {

  String TM = "";

      public DisplayToast(String toast){
          TM = toast; 
      }

      public void run(){
         Toast.makeText(getApplicationContext(), TM, Toast.LENGTH_SHORT).show();
      }
}

@Override
protected void onHandleIntent(Intent intent) {

   HN.post(new DisplayToast("New Toast on UI Thread")); 
}

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