[英]Setting a countdown timer with time picker dialog android
我的最终目标是拥有一个使用Android中的“时间选择器”对话框设置的倒数计时器。 到目前为止,我有一个可以设置为任何时间的时间选择器,并且我有一个倒数计时器。 所以我的问题是如何将倒数计时器中的textview设置为时间选择器中设置的值。 在我的代码中,我只是将倒数计时器设置为三分钟,但我希望将其设置为时间选择器对话框中的设置时间。
这就是我所拥有的...
public class SleepTimer extends AppCompatActivity {
TimePicker myTimePicker;
Button buttonstartSetDialog;
TextView textAlarmPrompt;
TimePickerDialog timePickerDialog;
final static int RQS_1 = 1;
Button btnStart, btnStop;
TextView textViewTime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sleep_timer);
btnStart = (Button)findViewById(R.id.btnStart);
btnStop= (Button)findViewById(R.id.btnStop);
textViewTime = (TextView)findViewById(R.id.textViewTime);
final CounterClass timer = new CounterClass(180000, 1000);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timer.start();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timer.cancel();
}
});
textAlarmPrompt = (TextView)findViewById(R.id.alarmprompt);
buttonstartSetDialog = (Button)findViewById(R.id.startSetDialog);
buttonstartSetDialog.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textAlarmPrompt.setText("");
openTimePickerDialog(false);
}
});
}
private void openTimePickerDialog(boolean is24r){
Calendar calendar = Calendar.getInstance();
timePickerDialog = new TimePickerDialog(
SleepTimer.this,
onTimeSetListener,
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
is24r);
timePickerDialog.setTitle("Set Sleep Time");
timePickerDialog.show();
}
TimePickerDialog.OnTimeSetListener onTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar calNow = Calendar.getInstance();
Calendar calSet = (Calendar) calNow.clone();
calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
calSet.set(Calendar.MINUTE, minute);
calSet.set(Calendar.SECOND, 0);
calSet.set(Calendar.MILLISECOND, 0);
if(calSet.compareTo(calNow) <= 0){
calSet.add(Calendar.DATE, 1);
}
setAlarm(calSet);
}};
public class CounterClass extends CountDownTimer {
/**
* @param millisInFuture The number of millis in the future from the call
* to {@link #start()} until the countdown is done and {@link #onFinish()}
* is called.
* @param countDownInterval The interval along the way to receive
* {@link #onTick(long)} callbacks.
*/
public CounterClass(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@Override
public void onTick(long millisUntilFinished) {
long millis = millisUntilFinished;
String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis), TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
System.out.println(hms);
textViewTime.setText(hms);
}
@Override
public void onFinish() {
}
}
如果有人知道该怎么做,请回复。 谢谢:)
首先更改此方法,使其看起来像这样
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
timer = new CounterClass((minute * 60 * 1000) + (hourOfDay * 60* 60 * 1000), 1000);
long millis = (minute * 60 * 1000) + (hourOfDay * 60* 60 * 1000);
String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis), TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
System.out.println(hms);
textViewTime.setText(hms);
}};
然后删除final CounterClass timer = new CounterClass(180000, 1000)
并将其添加为字段而不是
CounterClass timer;
这段代码设置了TextView,还使用选择的时间更新了您的计数器。 但是我重用了您的代码,现在我们重复相同的代码,这不好。 将其提取为一种方法,以免重复。
复印粘贴版
public class SleepTimer extends AppCompatActivity {
TimePicker myTimePicker;
Button buttonstartSetDialog;
TextView textAlarmPrompt;
TimePickerDialog timePickerDialog;
final static int RQS_1 = 1;
Button btnStart, btnStop;
TextView textViewTime;
CounterClass timer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sleep_timer);
btnStart = (Button) findViewById(R.id.btnStart);
btnStop = (Button) findViewById(R.id.btnStop);
textViewTime = (TextView) findViewById(R.id.textViewTime);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timer.start();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timer.cancel();
}
});
textAlarmPrompt = (TextView) findViewById(R.id.alarmprompt);
buttonstartSetDialog = (Button) findViewById(R.id.startSetDialog);
buttonstartSetDialog.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textAlarmPrompt.setText("");
openTimePickerDialog(false);
}
});
}
private void openTimePickerDialog(boolean is24r) {
Calendar calendar = Calendar.getInstance();
timePickerDialog = new TimePickerDialog(
SleepTimer.this,
onTimeSetListener,
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
is24r);
timePickerDialog.setTitle("Set Sleep Time");
timePickerDialog.show();
}
TimePickerDialog.OnTimeSetListener onTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
timer = new CounterClass((minute * 60 * 1000) + (hourOfDay * 60* 60 * 1000), 1000);
long millis = (minute * 60 * 1000) + (hourOfDay * 60* 60 * 1000);
String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis), TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
System.out.println(hms);
textViewTime.setText(hms);
}};
public class CounterClass extends CountDownTimer {
/**
* @param millisInFuture The number of millis in the future from the call
* to {@link #start()} until the countdown is done and {@link #onFinish()}
* is called.
* @param countDownInterval The interval along the way to receive
* {@link #onTick(long)} callbacks.
*/
public CounterClass(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@Override
public void onTick(long millisUntilFinished) {
long millis = millisUntilFinished;
String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis), TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
System.out.println(hms);
textViewTime.setText(hms);
}
@Override
public void onFinish() {
}
}
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