应用程序空闲时间

问题描述

在我的应用程序有三个活动的一个 - 乙 - ç - >答：我想检测应用程序的空闲时间，让15分钟后，它会弹出一个消息，不论活动。什么是实现这一目标的最佳方法。

In my application there are three activities A -> B -> C -> A. I want to detect application's idle time, so that after 15 mins it will pop up a message irrespective of activity. what is the best method to implement this.

推荐答案

我会做它用这种方式：

1. 创建线程，将控制闲置活动
2. 运行此线程应用环境
3. 在每个用户交互刚刚刷新的空闲时间

存储全局线程将控制空闲时间类

Class for storing global Thread which will control idle time

public class ControlApplication extends Application
{
    private static final String TAG=ControlApplication.class.getName();
    private Waiter waiter;  //Thread which controls idle time

    // only lazy initializations here!
    @Override
    public void onCreate()
    {
        super.onCreate();
        Log.d(TAG, "Starting application"+this.toString());
        waiter=new Waiter(15*60*1000); //15 mins
        waiter.start();
    }

    public void touch()
    {
        waiter.touch();
    }
}

类，这将是父母对你所有的活动

Class which will be parent for all of your activities

public class ControlActivity extends Activity
{
    private static final String TAG=ControlActivity.class.getName();

    /**
     * Gets reference to global Application
     * @return must always be type of ControlApplication! See AndroidManifest.xml
     */
    public ControlApplication getApp()
    {
        return (ControlApplication )this.getApplication();
    }

    @Override
    public void onUserInteraction()
    {
        super.onUserInteraction();
        getApp().touch();
        Log.d(TAG, "User interaction to "+this.toString());
    }

}

最后线程本身

And finally Thread itself

public class Waiter extends Thread
{
    private static final String TAG=Waiter.class.getName();
    private long lastUsed;
    private long period;
    private boolean stop;

    public Waiter(long period)
    {
        this.period=period;
        stop=false;
    }

    public void run()
    {
        long idle=0;
        this.touch();
        do
        {
            idle=System.currentTimeMillis()-lastUsed;
            Log.d(TAG, "Application is idle for "+idle +" ms");
            try
            {
                Thread.sleep(5000); //check every 5 seconds
            }
            catch (InterruptedException e)
            {
                Log.d(TAG, "Waiter interrupted!");
            }
            if(idle > period)
            {
                idle=0;
                //do something here - e.g. call popup or so
            }
        }
        while(!stop);
        Log.d(TAG, "Finishing Waiter thread");
    }

    public synchronized void touch()
    {
        lastUsed=System.currentTimeMillis();
    }

    public synchronized void forceInterrupt()
    {
        this.interrupt();
    }

    //soft stopping of thread
    public synchronized void stop()
    {
        stop=true;
    }

    public synchronized void setPeriod(long period)
    {
        this.period=period;
    }

}

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