我刨光很久以前这个代码定时器Android应用程序启动活动上创建
公共类MainActivity扩展活动{
private Button startButton;
private Button stopButton;
private Button clearButton;
private TextView timeValue;
private long timeStart = 0L;
private Handler timeHandler = new Handler();
long timeInMilisec = 0L;
long timeMemo = 0L;
long timeUpdate = 0L;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
timeValue = (TextView) findViewById(R.id.timeValue);
startButton = (Button) findViewById(R.id.startButton);
startButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
timeStart = SystemClock.uptimeMillis();
timeHandler.postDelayed(updateTimerThread, 0);
}
});
stopButton = (Button) findViewById(R.id.stopButton);
stopButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
timeMemo += timeInMilisec;
timeHandler.removeCallbacks(updateTimerThread);
}
});
clearButton = (Button) findViewById(R.id.clearButton);
clearButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.clearButton:
timeMemo = 0L;
timeValue.setText("00:00:00");
int secs = 0;
int mins = 0;
secs = 0;
int milliseconds = 0;
timeInMilisec = SystemClock.uptimeMillis() - timeStart;
timeUpdate = timeMemo + timeInMilisec;
timeValue.setText("" + mins + ":"
+ String.format("%02d", secs) + ":"
+ String.format("%03d", milliseconds));
timeHandler.removeCallbacksAndMessages(updateTimerThread);
timeValue.setText("00:00:00");
break;
}
}
});
}
Runnable updateTimerThread = new Runnable() {
public void run() {
timeInMilisec = SystemClock.uptimeMillis() - timeStart;
timeUpdate = timeMemo + timeInMilisec;
int secs = (int) (timeUpdate/1000);
int mins = secs/60;
secs = secs % 60;
int milliseconds = (int) (timeUpdate % 1000);
timeValue.setText("" + mins + ":"
+ String.format("%02d", secs) + ":"
+ String.format("%03d", milliseconds));
timeHandler.postDelayed(this, 0);
}
};
现在我想我的计时器,当活动开始,而无需按启动开始运行按钮(我想删除它) 我试图把开始按钮的代码放在public void run()的末尾,但它没有为我工作。如何在启动活动时启动计时器?