Question

我有疑问。这个代码计时器是否正确;]？或者我可以更容易地做到这一点

package timer2.android;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Timer2Activity extends Activity {

private TextView tv;
private Timer myTimer;

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

    tv = (TextView)findViewById(R.id.textView1);

    myTimer = new Timer();
    myTimer.schedule(new TimerTask() {
        @Override
        public void run() {
            TimerMethod();
        }

    }, 0, 1000);
}

private void TimerMethod()
{

    //This method is called directly by the timer
    //and runs in the same thread as the timer.

    //We call the method that will work with the UI
    //through the runOnUiThread method.
    this.runOnUiThread(Timer_Tick);
}

long mStartTime = System.currentTimeMillis();

private Runnable Timer_Tick = new Runnable() {
    public void run() {
        final long start = mStartTime;
        long millis = System.currentTimeMillis() - start;
        int seconds = (int) (millis / 1000);
        int minutes = (int) (seconds / 60);
         seconds     = seconds % 60;

         if (seconds < 10) 
         {
            tv.setText("" + minutes + ":0" + seconds);
         } 
         else 
         {
            tv.setText("" + minutes + ":" + seconds);            
         }

         //a++;

    //This method runs in the same thread as the UI.               

    //Do something to the UI thread here

    }
};

}

Answer 1

这里看不出任何错误。但是你应该使用Handler作为计时器，因为它不会创建额外的线程。请参阅此处的示例：Repeat a task with a time delay?

android计时器问题

1 个答案: