Java 我怎样才能在计时器中使我的程序每秒都会做一些事情呢?
在MainActivity.java的顶部,我添加了:Java 我怎样才能在计时器中使我的程序每秒都会做一些事情呢?,java,android,Java,Android,在MainActivity.java的顶部,我添加了: private Handler customHandler = new Handler(); long timeSwapBuff = 0L; 然后在onCreate中,我做了: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setConten
private Handler customHandler = new Handler();
long timeSwapBuff = 0L;
然后在onCreate中,我做了:
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startTime = SystemClock.uptimeMillis();
customHandler.postDelayed(updateTimerThread,0);
timerValue = (TextView) findViewById(R.id.timerValue);
startButton = (Button) findViewById(R.id.startButton);
startButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
startTime = SystemClock.uptimeMillis();
customHandler.postDelayed(updateTimerThread, 0);
}
});
pauseButton = (Button) findViewById(R.id.pauseButton);
pauseButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
customHandler.removeCallbacks(updateTimerThread);
}
});
然后在updateTimerThread中:
private Runnable updateTimerThread = new Runnable() {
public void run() {
long updatedTime = 0L;
long timeInMilliseconds = 0L;
timeInMilliseconds = SystemClock.uptimeMillis() - startTime;//System.currentTimeMillis() - startTime;
updatedTime = timeSwapBuff + timeInMilliseconds;
int secs = (int) (updatedTime / 1000);
int mins = secs / 60;
secs = secs % 60;
int milliseconds = (int) (updatedTime % 1000);
timerValue.setText("" + mins + ":"
+ String.format("%02d", secs) + ":"
+ String.format("%03d", milliseconds));
customHandler.postDelayed(this, 0);
}
};
现在,每次我从开始运行程序时,计时器将从00:00:00开始
现在我想加上一些东西,让每一秒都能做点什么。
不重置计时器,不暂停或停止计时器,让它继续运行,但每秒钟我都想在程序中执行其他操作
问题是我如何每秒钟检查一次来做某事