Question

我正在尝试启动一项新活动“SMS.java”，如果我在30秒内不响应我的计时器。 30秒后，应该开始新的活动。谁能帮我吗？？？第5行的类Timer扩展了CountDownTimer .. 这是代码：

//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!!!");
    }
}

Answer 1

对于计时器方法，您可以更好地使用线程。它会工作。这是使用线程在Android中显示计时器的示例。它每秒运行一次线程。如果你想改变时间。

Timer MyTimer=new Timer();
        MyTimer.schedule(new TimerTask() {
            @Override
            public void run() {
                runOnUiThread(new Runnable() {
                    public void run() {
                        TimerBtn=(Button) findViewById(R.id.Timer);
                        TimerBtn.setText(new Date().toString());
                }
                });
            }
            }, 0, 1000);

Answer 2

我所做的是从我的CountDownTimer类的Activity调用一个方法，如下所示：

//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();
    }

如何在计时器完成后开始活动？

2 个答案: