Android onTaskRemoved() 调用网络服务

Question

很好 day.I 很糟糕 situation.I 我正在 session.I 中创建一个位置共享逻辑在 mysql.When android 命中的服务器上保持该会话activity，我相应地插入用户 information.When android 离开 activity 当然，我删除了该列，因此会话被放弃，因为相反 side.All 很好，直到一个 issue.Android 不提供从最近刷过的应用程序的回调，这意味着应用程序被杀死 completelly.I 找到了解决方法 there.I 我正在使用服务并在达到我想要的状态后立即启动服务 activity.In 服务我有一个叫做 onTaskRemoved() 的简单的东西，它会在应用程序被从 recents.All 滑动到我想调用我的服务器以删除 column.The 呼叫不仅会通过，我永远不会在那里收到任何响应，但在 onDestroy() 中，一切都像 expected.Actually 一样工作，这里是代码

 @Override
public void onTaskRemoved(Intent rootIntent) {
    destroySession();
    super.onTaskRemoved(rootIntent);
}

private void destroySession() {
    Log.d("Fsafasfsafasfas", "destroySession: " + opponentId + " my user id" + sharedHelper.getUserId());
    Call<ResponseBody> locationCall = Retrofit.getInstance().getInkService().requestFriendLocation(sharedHelper.getUserId(), opponentId, "", "", Constants.LOCATION_REQUEST_TYPE_DELETE);
    locationCall.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
            if (response == null) {
                destroySession();
                return;
            }
            if (response.body() == null) {
                destroySession();
                return;
            }
            try {
                String responseBody = response.body().string();
                Log.d("Fsafasfsafasfas", "onResponse: " + responseBody);
                JSONObject jsonObject = new JSONObject(responseBody);
                boolean success = jsonObject.optBoolean("success");
                if (success) {
                    stopSelf();
                } else {
                    destroySession();
                }
            } catch (IOException e) {
                stopSelf();
                e.printStackTrace();
            } catch (JSONException e) {
                stopSelf();
                e.printStackTrace();
            }
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            destroySession();
        }
    });
}

我猜这个电话永远打不通，因为唯一打印的日志是 id 的日志，仅此而已。有人知道发生了什么事吗？我该如何处理这种情况？

Answer 1

/**
 * Created by Parag on 01/05/2017.
 */

public class AppService extends android.app.Service {
    public static final String TAG=AppService.class.getName();
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Bundle bundle=intent.getExtras();
        if(bundle!=null){
            final String logout=bundle.getString("logout");
            final String driverLoginId=bundle.getString("driverLoginId");
            if(logout!=null&&driverLoginId!=null){
                Toast.makeText(this, "logging out", Toast.LENGTH_SHORT).show();
                Log.e(TAG,"Logging out");
                Log.e(TAG,"Inside driverLogout "+driverLoginId);
                Call<LogoutResponse> call = RestHandler.getApiService().driverLogout(driverLoginId);
                call.enqueue(new Callback<LogoutResponse>() {
                    @Override
                    public void onResponse(Call<LogoutResponse> call, Response<LogoutResponse> response) {
                        //close the service on receiving response from API
                        Log.e("Response : ",response.body().getStatus()+"");
                        AppService.this.stopSelf();
                    }
                    @Override
                    public void onFailure(Call<LogoutResponse> call, Throwable t) {
                        //close the service on receiving response from API
                        AppService.this.stopSelf();
                    }
                });

            }else{
                //Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
                Log.e(TAG,"DriverLoginId : "+driverLoginId);
                Log.e(TAG,"Logout : "+logout);
            }
        }else{
            //Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
            Log.e(TAG,"Service Start");
        }
        return super.onStartCommand(intent,flags,startId);
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onTaskRemoved(Intent rootIntent) {

        Log.e(TAG,"Service Stop");
        UserLocalStore userLocalStore=new UserLocalStore(AppService.this);
        Log.e("USER DATA :",userLocalStore.fetchUserData().toString());
        Intent restartServiceTask = new Intent(getApplicationContext(),this.getClass());
        restartServiceTask.setPackage(getPackageName());
        restartServiceTask.putExtra("logout","true");
        restartServiceTask.putExtra("driverLoginId",userLocalStore.fetchUserData().getUserId());
        PendingIntent restartPendingIntent =PendingIntent.getService(getApplicationContext(), 1,restartServiceTask, PendingIntent.FLAG_ONE_SHOT);
        AlarmManager myAlarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        myAlarmService.set(
                AlarmManager.ELAPSED_REALTIME,
                SystemClock.elapsedRealtime() + 1000,
                restartPendingIntent);
        super.onTaskRemoved(rootIntent);
    }


}

我也面临同样的问题，即无法从 onTaskRemoved 方法进行任何 API 调用。所以，我也研究了很多，但没有找到解决办法。所以，我终于想到了重新启动 Web 服务，并在意图中放置一些额外的东西。通过这种方式，您可以区分服务何时重新启动以执行您的 API 调用。

Answer 2

我通过取消线程策略的严格模式解决了这个问题。所以http请求可以从主线程完成。

 StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 StrictMode.setThreadPolicy(policy);

在正常情况下不推荐这样做，但是当应用程序崩溃或关闭时，我想发送一个 http 请求是可以的。

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