Java 如何在x分钟后关闭活动?
我正在寻找在x分钟后关闭已打开活动的最简单方法。android是否提供倒计时类,还是我必须自己制作一个 我尝试过这个代码,但它不起作用Java 如何在x分钟后关闭活动?,java,android,Java,Android,我正在寻找在x分钟后关闭已打开活动的最简单方法。android是否提供倒计时类,还是我必须自己制作一个 我尝试过这个代码,但它不起作用 Thread isOnDisplayThread = new Thread(new Runnable() { @Override public void run() { Timer mTimer = new Timer(); mTimer.schedu
Thread isOnDisplayThread = new Thread(new Runnable() {
@Override
public void run() {
Timer mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
Log.d(TAG, (isApplicationOnDisplay) ? "Application on display" : "APPLICATION ON BACKGROUND");
if (!isApplicationOnDisplay) {
notOnDisplayTime++;
if (notOnDisplayTime >= 10) {
Process.killProcess(Process.myPid());
}
} else {
notOnDisplayTime = 0;
}
}
}, 0, 1000);
}
});
isOnDisplayThread.run();
坏主意:
Process.killProcess(Process.myPid())
您应该在UI线程中调用finish()函数。例如,使用runOnUiThread():永远不要*调用Java
线程的run()
方法。调用它的start()
方法,这会导致Java在新线程中为您调用它的run()
方法。声明计时器并调用finish()
。它将在特定时间后关闭您的活动
//Declare the timer
Timer t = new Timer();
//Set the schedule function and rate
t.schedule(new TimerTask() {
@Override
public void run() {
finish();
}
},
//Set how long before to start calling the TimerTask (in milliseconds)
0,
//Set the amount of time between each execution (in milliseconds)
1000);
它不起作用,因为您正在调用run方法。它不会启动线程。
因此,您需要调用start方法来调用线程
isOnDisplayThread.start();
此外,为了完成线程,您需要调用
finish() ///method of the Activity class
如果代码位于Activity类中,则只需调用finish()方法
只需使用Handler.postDelayed
方法。什么是“它不工作”意思?这个问题很容易改进。请更正。我确实喜欢你的代码简单而专业,祝福你;)@西德哈特,谢谢你,伙计!我以后会照顾你的。
Handler handler = new Handler();
Runnable r=new Runnable() {
@Override
public void run() {
finish();
}
};
handler.postDelayed(r, 2000);
Handler handler = new Handler();
Runnable r=new Runnable() {
@Override
public void run() {
finish();
}
};
handler.postDelayed(r, 2000);
private final long startTime = 200000;
private final long interval = 1000;
countDownTimer = new MalibuCountDownTimer(startTime, interval);
countDownTimer.start();
public class MalibuCountDownTimer extends CountDownTimer{
public MalibuCountDownTimer(long startTime, long interval){
super(startTime, interval);
}
@Override
public void onFinish(){
txttimer.setText("Time's up!");
//timeElapsedView.setText("Time Elapsed: " + String.valueOf(startTime));
}
@Override
public void onTick(long millisUntilFinished) {
//text.setText("Time remain:" + millisUntilFinished);
//timeElapsed = startTime - millisUntilFinished;
String format = String.format("%%0%dd",2);
String seconds = String.format(format, millisUntilFinished/1000 % 60);
String minutes = String.format(format, (millisUntilFinished /(1000*60))%60);
String hours = String.format(format, (millisUntilFinished /(1000*60*60))%24);
String time = hours + ":" + minutes + ":" + seconds;
txttimer.setText("Time Remaining:" + time);
TimeUnit.MILLISECONDS.toMinutes(timeElapsed) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(timeElapsed)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(timeElapsed)));
System.out.println(hms);
//text.setText("Time remain:" + h+":"+m+":"+s);
//timeElapsedView.setText("Time Elapsed: " + String.valueOf(timeElapsed));
}
}