如何在 Android 中使用警报管理器放入 Web 服务

Question

我不知道我将如何从 web 服务中放置数据，同时它会在警报管理器中工作以在每组时间发送数据。我知道如何从 web 服务中获取数据，但对于警报管理器我一无所知。我尝试从 web 服务中放入数据的过程，但它会出错，因为 class 扩展了 BroadcastReceiver。这就是我放入网络服务的方式。

public void passdata(View View){
String a = name.getText().toString();
RequestParams params = new RequestParams();

if(a != null){
params.put("name", a);
WebService(params);
}
}

public void WebService(RequestParams params) {
        progressDialog.show();

        AsyncHttpClient client = new AsyncHttpClient();
        client.get("http://192.168.8.100:8080/taxisafe3/webService/login", params, new AsyncHttpResponseHandler() {
            public void onSuccess(String response) {
                progressDialog.hide();
                try {
                    JSONObject object = new JSONObject(response);

                    if (object.getBoolean("status")) {
                        Toast.makeText(getApplicationContext(), "Login Successful!", Toast.LENGTH_LONG).show();
                        finish();
                        gotoHome();
                    } else {
                        Toast.makeText(getApplicationContext(), "Username or Password is incorrect!", Toast.LENGTH_LONG).show();
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }

            public void onFailure(int statusCode, Throwable error, String content) {
                progressDialog.hide();

                if (statusCode == 404) {
                    Toast.makeText(getApplicationContext(), "Requested resource not found", Toast.LENGTH_LONG).show();
                } else if (statusCode == 500) {
                    Toast.makeText(getApplicationContext(), "Something went wrong", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(), "Unexpected Error Occured! (No Internet Connection)", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

我如何使用警报管理器将数据放入 web 服务中？例如，这样我就可以每分钟从 WebService 发送数据。请帮忙。

更新自约瑟夫回答：

    public class Web extends IntentService {
    String msg = "aw";
    public Web(String name) {
        super(name);
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        RequestParams params = new RequestParams();
        params.put("message", msg);
        WebService(params);

        Intent in = new Intent(Web.this, AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(Web.this, 0, in, PendingIntent.FLAG_UPDATE_CURRENT);

        AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.add(calendar.MILLISECOND, 1);
        alarmManager.setRepeating(AlarmManager.RTC, calendar.getTimeInMillis(), 1000 * 60 * 1, pendingIntent);
    }
    public void WebService(RequestParams params) {

        AsyncHttpClient client = new AsyncHttpClient();
        client.get("http://192.168.254.105:8080/taxisafe3/webService/emergency", params, new AsyncHttpResponseHandler() {
            public void onSuccess(String response) {
                try {
                    JSONObject object = new JSONObject(response);

                    if (object.getBoolean("status")) {
                        Toast.makeText(getApplicationContext(), "Emergency Sent to Server", Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(getApplicationContext(), "Emergency not Sent to Server", Toast.LENGTH_LONG).show();
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }

            public void onFailure(int statusCode, Throwable error, String content) {

                if (statusCode == 404) {
                    Toast.makeText(getApplicationContext(), "Requested resource not found", Toast.LENGTH_LONG).show();
                } else if (statusCode == 500) {
                    Toast.makeText(getApplicationContext(), "Something went wrong", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(), "Unexpected Error Occured! (No Internet Connection)", Toast.LENGTH_LONG).show();
                }
            }
        });
    }
}

接收者Class

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent)
    {        
        Intent i = new Intent(context, Web.class);
        context.startService(i);
}
}

Answer 1

您可以创建一个 Service，闹钟响起时应调用它。 Service 应该包含调用网络服务所需的所有代码。为了重新安排对 Web 服务的调用，您可以使用 AlarmManager.setRepeating() 方法。

因此，以这种方式扩展 IntentService（它是服务 class 的一个实现，可简化您的工作）：

public class DownloadService extends IntentService {

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

  @Override
  protected void onHandleIntent(Intent intent) {
      callWS(); //this method can execute your AsyncTask for calling web service, or anything you want
  }
}

现在声明一个 BroadcastReceiver 应该接收

public class UpdateReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context c, Intent arg1) {
        Intent i = new Intent(c, DownloadService.class);
        c.startService(i);     
    }
}

设置AlarmManager重复操作。（只调用一次）

Intent intent = new Intent(this, UpdateReceiver.class);

PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmMgr = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE);

Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
alarmMgr.setRepeating(AlarmManager.RTC, cal.getTimeInMillis()+30000, AlarmManager.INTERVAL_HOUR * 2, alarmIntent);

在上面的示例中，将在 30 秒后调用 Web 服务，以后每隔 e 小时调用一次。

注意：如果您的设备重新启动，您的闹钟将被取消，因此如果您想重新创建它，您应该创建一个 BroadcastReceiver 来监听操作 android.intent.action.BOOT_COMPLETED并允许你调用上面的代码来设置重复闹钟。

Answer 2

我找到了答案。在 AlarmReceiver 中初始化请求参数，然后删除 WebService 中的参数，然后放入来自另一个 class 的消息。这是代码。

public class AlarmReceiver extends BroadcastReceiver {
    RequestParams params = new RequestParams();
    @Override
    public void onReceive(final Context context, Intent intent)
    {
//This is the message come from another class
String msg = bundle.getString("mess");

//check if the message is not null
        if(PatternChecker.isNotNull(msg)) {
            params.put("message",msg);
            Webservice();
        }
}

WebService method here to perform the sending data to the webservice.

如何在 Android 中使用警报管理器放入 Web 服务

How to put in webservice with alarm manager in Android

java

android

web-services

alarmmanager