（二）仅仅通过Application监听用户行为及App的在线状态和在线时长

import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by admin on 2018/3/2.
 * @author  cxx
 * note: 根据activity的生命周期来判断用户的操作。在两种情况下结束app计时统计。
 * 一种是：当处于栈顶或顶层的activity被挂起，要强制杀掉进程的时候。
 * 二种是：当用户逐层退回到最底层的activity，并finish的时候。即：清空activity栈结束app
 */

public class TimeRecord {

    private boolean isAppAlive = true;  //判断app计时是否已经结束，如果结束，但是app并没有被杀掉，用此字段复活计时功能
    private boolean isSwitchActivity = false;  //用来标记是否为从顶层activity切换到其他层activity
    private boolean isAppExit = false;  //用来标记，程序退出后，application是否完全退出，如果只是activity清空，但是application为退出，则再次进入，触发active

    private String topActivity ;
    private MetaClass helper ;
    private Map<String ,String> map = new HashMap<>();
    private long timeStart =0;   //开始计时的时间戳

    private String TAG = "cxx";


    public void init(final Context context,MetaClass metaClass){
        Application application  = (Application)context.getApplicationContext();

        //上报活跃量
       System.out.println(TAG+"上报活跃量——初始化");
        this.helper = metaClass;
        helper.reportActive();

        timeStart = System.currentTimeMillis()/1000;
       System.out.println(TAG+"开始计时——初始化"+timeStart);

        application.registerActivityLifecycleCallbacks(new Application.ActivityLifecycleCallbacks() {
            @Override
            public void onActivityCreated(Activity activity, Bundle bundle) {
                topActivity = activity.getClass().getSimpleName();
                map.put(topActivity,topActivity);
                isAppAlive = true;
                isSwitchActivity = false;
               System.out.println(TAG+"Created_activity:"+activity.getClass().getSimpleName());
            }

            @Override
            public void onActivityStarted(Activity activity) {
               System.out.println(TAG+"Started_activity:"+activity.getClass().getSimpleName());
            }

            @Override
            public void onActivityResumed(Activity activity) {
                //为什么要写在这里，由于启动模式的问题。导致以singleTask方式启动的界面，回退时，onActivityStarted里回来的是顶层的activity
               System.out.println(TAG+"Resumed_activity:"+activity.getClass().getSimpleName());

                if(!activity.getClass().getSimpleName().equals(topActivity)){
                    isSwitchActivity = true;
                }else{
                    isSwitchActivity = false;
                }
                topActivity=activity.getClass().getSimpleName();

                if(!isAppAlive||isAppExit){
                    isAppExit = false;
                   System.out.println(TAG+"上报活跃量——onResumed");
                    helper.reportActive();

                    timeStart = System.currentTimeMillis()/1000;
                   System.out.println(TAG+"开始计时——onResumed"+timeStart);
                    isAppAlive = true;
                }
            }

            @Override
            public void onActivityPaused(Activity activity) {
            }

            @Override
            public void onActivityStopped(Activity activity) {
               System.out.println(TAG+"stop_activity:"+activity.getClass().getSimpleName());
               System.out.println(TAG+"stop_topActivity："+topActivity);
                if(topActivity.equals(activity.getClass().getSimpleName())){
                    if(!isSwitchActivity){
                        long timeEnd = System.currentTimeMillis()/1000;
                        if(helper!=null){
                            long timegap = timeEnd-timeStart;
                            String onlineTime = String.valueOf(timegap);
                           System.out.println(TAG+"计时结束——stopped："+timeEnd);
                           System.out.println(TAG+"计时结束时长——stopped："+onlineTime);
                            helper.reportOnline(onlineTime);
                        }
                        isAppAlive=false;
                    }

                }
            }

            @Override
            public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {
            }

            @Override
            public void onActivityDestroyed(Activity activity) {
                map.remove(activity.getClass().getSimpleName());
                if(map.size()==0&&isAppAlive){
                    long timeEnd = System.currentTimeMillis()/1000;
                    if(helper!=null){
                        long timegap = timeEnd-timeStart;
                        String onlineTime = String.valueOf(timegap);
                       System.out.println(TAG+"计时结束——destory："+timeEnd);
                       System.out.println(TAG+"计时结束时长——destory："+onlineTime);
                        helper.reportOnline(onlineTime);
                    }
                    isAppAlive = false;
                }
                if(map.size() ==0){
                    isAppExit = true;
                }
            }
        });
    }

}