Query calendar in a background thread.

import android.content.pm.PackageManager.NameNotFoundException;

import android.net.Uri;

import android.os.Handler;

import android.os.HandlerThread;

import android.os.Looper;

import android.os.Process;

import android.os.UserHandle;

import android.os.UserManager;

import android.service.notification.Condition;

    private final ArraySet<Uri> mSubscriptions = new ArraySet<Uri>();

    private final SparseArray<CalendarTracker> mTrackers = new SparseArray<>();

    private final Handler mWorker;

    private final HandlerThread mThread;

    private boolean mConnected;

    private boolean mRegistered;

    private boolean mBootComplete;  // don't hammer the calendar provider until boot completes.

    private long mNextAlarmTime;

    public EventConditionProvider(Looper worker) {

    public EventConditionProvider() {

        if (DEBUG) Slog.d(TAG, "new " + SIMPLE_NAME + "()");

        mWorker = new Handler(worker);

        mThread = new HandlerThread(TAG, Process.THREAD_PRIORITY_BACKGROUND);

        mThread.start();

        mWorker = new Handler(mThread.getLooper());

    }

    @Override

            mConditionProviders.addSystemProvider(new ScheduleConditionProvider());

        }

        if (mConditionProviders.isSystemProviderEnabled(ZenModeConfig.EVENT_PATH)) {

            mConditionProviders.addSystemProvider(new EventConditionProvider(helper.getLooper()));

            mConditionProviders.addSystemProvider(new EventConditionProvider());

        }

        mConditionProviders.setCallback(this);

    }