PollingUtil.java

package com.cheng.utils;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.text.TextUtils;

/**
 * 轮询服务工具类
 */
public final class PollingUtil {

    private static final boolean DEBUG = true;
    private static final String TAG = "PollingUtils";

    /**
     * Don't let anyone instantiate this class.
     */
    private PollingUtil() {
        throw new Error("Do not need instantiate!");
    }

    /**
     * 判断是否存在轮询服务
     *
     * @param context 上下文
     * @param cls     Class
     * @return
     */
    public static boolean isPollingServiceExist(Context context, Class<?> cls) {
        Intent intent = new Intent(context, cls);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,
                intent, PendingIntent.FLAG_NO_CREATE);
        if (DEBUG) {
            if (pendingIntent != null)
                Logger.e(pendingIntent.toString());
            Logger.e(pendingIntent != null ? "Exist" : "Not exist");
        }
        return pendingIntent != null;
    }

    /**
     * 开启轮询服务
     *
     * @param context  上下文
     * @param interval 时间间隔，单位为秒
     * @param cls      Class
     */
    public static void startPollingService(Context context, int interval,
                                           Class<?> cls) {
        startPollingService(context, interval, cls, null);
    }

    /**
     * 开启轮询服务
     *
     * @param context  上下文
     * @param interval 时间间隔，单位为秒
     * @param cls      Class
     * @param action   Action
     */
    public static void startPollingService(Context context, int interval,
                                           Class<?> cls, String action) {
        AlarmManager manager = (AlarmManager) context
                .getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, cls);
        if (!TextUtils.isEmpty(action)) {
            intent.setAction(action);
        }
        PendingIntent pendingIntent = PendingIntent.getService(context, 0,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);
        long triggerAtTime = SystemClock.elapsedRealtime();
        manager.setRepeating(AlarmManager.ELAPSED_REALTIME, triggerAtTime,
                interval * 1000, pendingIntent);
    }

    /**
     * 停止轮询服务
     *
     * @param context 上下文
     * @param cls     Class
     */
    public static void stopPollingService(Context context, Class<?> cls) {
        stopPollingService(context, cls, null);
    }

    /**
     * 停止轮询服务
     *
     * @param context 上下文
     * @param cls     Class
     * @param action  Action
     */
    public static void stopPollingService(Context context, Class<?> cls,
                                          String action) {
        AlarmManager manager = (AlarmManager) context
                .getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, cls);
        if (!TextUtils.isEmpty(action)) {
            intent.setAction(action);
        }
        PendingIntent pendingIntent = PendingIntent.getService(context, 0,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);
        manager.cancel(pendingIntent);
    }

}