如何停止一定的次数后，计时器 [英] How to stop a timer after certain number of times

问题描述

试图用一个定时器做，每组10秒的时间间隔运行此4倍。我曾尝试与循环停止，但它总是死机。使用日程安排功能有三个参数都试过了，但我不知道哪里来实现计数器变量。任何想法？

最后的处理程序处理程序=新的处理程序（）; 定时器定时器2 =新的Timer（）; TimerTask的测试=新的TimerTask（）{     公共无效的run（）{         handler.post（新的Runnable（）{             公共无效的run（）{                 Toast.makeText（MainActivity.this，测试，                     Toast.LENGTH_SHORT）.show（）;             }         }）;     } }; INT DELAY = 10000; 的for（int i = 0; i = 2;！我++）{     timer2.schedule（测试，延迟）;     timer2.cancel（）;     timer2.purge（）; }

解决方案

 私人最终静态INT DELAY = 10000;
私人最终处理程序处理程序=新的处理程序（）;
私人最终定时器定时=新的Timer（）;
私人最终TimerTask的任务=新的TimerTask（）{
    私人INT计数器= 0;
    公共无效的run（）{
        handler.post（新的Runnable（）{
            公共无效的run（）{
                Toast.makeText（MainActivity.this，测试，Toast.LENGTH_SHORT）.show（）;
            }
        }）;
        如果（++计数器== 4）{
            timer.cancel（）;
        }
    }
};

@覆盖
公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;
    timer.schedule（任务，延迟，延迟）;
}
 

Trying to use a timer to do run this 4 times with intervals of 10 seconds each. I have tried stopping it with a loop, but it keeps crashing. Have tried using the schedule function with three parameters, but I didn't know where to implement a counter variable. Any ideas?

final Handler handler = new Handler(); 
Timer timer2 = new Timer(); 

TimerTask testing = new TimerTask() {
    public void run() { 
        handler.post(new Runnable() {
            public void run() {
                Toast.makeText(MainActivity.this, "test",
                    Toast.LENGTH_SHORT).show();

            }
        });
    }
}; 

int DELAY = 10000;
for (int i = 0; i != 2 ;i++) {
    timer2.schedule(testing, DELAY);
    timer2.cancel();
    timer2.purge();
}

解决方案

private final static int DELAY = 10000;
private final Handler handler = new Handler();
private final Timer timer = new Timer();
private final TimerTask task = new TimerTask() {
    private int counter = 0;
    public void run() {
        handler.post(new Runnable() {
            public void run() {
                Toast.makeText(MainActivity.this, "test", Toast.LENGTH_SHORT).show();
            }
        });
        if(++counter == 4) {
            timer.cancel();
        }
    }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    timer.schedule(task, DELAY, DELAY);
}

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