如何启动一个定时器完成后的活动？ [英] How to start an activity upon the completion of a timer?

问题描述

我想开始新的活动SMS.java，如果我不给内30secs我的定时器回应。后30secs，新ativity应启动。谁能帮助我？第5行的类定时器扩展了CountDownTimer ..
这里的code：

  // TimerAct.java
公共类TimerAct扩展活动
{
    静态的TextView timeDisplay;
    定时器T;
    INT长度= 30000;    / **当第一次创建活动调用。 * /
    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）
    {
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.time）;        timeDisplay =（的TextView）findViewById（R.id.timer）;
        timeDisplay.setText（剩余时间的长度+ / 1000）;
        T =新的Timer（长，1000）;
        t.start（）;
        查看B1 = findViewById（R.id.abort）;
        b1.setOnClickListener（新View.OnClickListener（）
        {
            公共无效的onClick（视图v）
            {
                t.cancel（）;
                完（）;
            }
        }）;
    }
}//Timer.java
公共类定时器扩展CountDownTimer
{
    公共定时器（长millisInFuture，长countDownInterval）
    {
        超（mil​​lisInFuture，countDownInterval）;
    }    公共无效onTick（长millisUntilFinished）
    {
        TimerAct.timeDisplay.setText（剩余时间+ millisUntilFinished / 1000）;
    }    公共无效onFinish（）
    {
        TimerAct.timeDisplay.setText（时间超过!!!）;
    }
}
 

解决方案

我要做的就是叫我CountDownTimer类从活动的方法，如：

  // Timer类我里面的活动
    公共类飞溅扩展CountDownTimer {        公共飞溅（长millisInFuture，长countDownInterval）{
            超（mil​​lisInFuture，countDownInterval）;
        }        @覆盖
        公共无效onFinish（）{
            nextActivity（Login.class，真）;
        }        @覆盖
        公共无效onTick（长millisUntilFinished）{}
    }//我的活动类方法    保护无效nextActivity（类＆LT;＆GT; MyClass的，布尔完成）{
        意图myIntent =新意图（这一点，MyClass的）;
        myIntent.addFlags（Intent.FLAG_ACTIVITY_REORDER_TO_FRONT）;
        startActivity（myIntent）;        如果（完成）
            完（）;
    }
 

I'm trying to start a new activity "SMS.java", if I dont respond to my timer within 30secs. After 30secs, the new ativity should be started. Can anyone help me out??? The class Timer on line 5 extends a CountDownTimer.. Here's the code:

//TimerAct.java
public class TimerAct extends Activity
{
    static TextView timeDisplay;
    Timer t;
    int length = 30000;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.time);

        timeDisplay = (TextView) findViewById(R.id.timer);
        timeDisplay.setText("Time left: " + length / 1000);
        t = new Timer(length, 1000);
        t.start();
        View b1 = findViewById(R.id.abort);
        b1.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v)
            {
                t.cancel();
                finish();
            }
        });
    }   
}

//Timer.java
public class Timer extends CountDownTimer
{
    public Timer(long millisInFuture, long countDownInterval)
    {
        super(millisInFuture, countDownInterval);
    }

    public void onTick(long millisUntilFinished)
    {
        TimerAct.timeDisplay.setText("Time left: " + millisUntilFinished / 1000);
    }

    public void onFinish()
    {
        TimerAct.timeDisplay.setText("Time over!!!");
    }
}

解决方案

What I do is call a method from the Activity on my CountDownTimer class, like this:

//Timer Class inside my Activity
    public class Splash extends CountDownTimer{

        public Splash(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onFinish() {
            nextActivity(Login.class, true);
        }

        @Override
        public void onTick(long millisUntilFinished) {}
    }

//Method on my Activity Class

    protected void nextActivity(Class<?> myClass, boolean finish) {
        Intent myIntent = new Intent(this, myClass);
        myIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        startActivity(myIntent);

        if(finish)
            finish();
    }

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