我目前有两个号码选择器。一种用于设置小时值，另一种用于设置倒数计时器的分钟值。目前，倒数计时器的值是小时数选择器或分钟数选择器的值，但两者都不是应该的。所以我的问题是如何将倒数计时器的textView更改为小时和分钟数字选择器值。如果您有任何疑问，这可能会使您感到困惑。
这是我的代码...
public class MainActivity extends AppCompatActivity {
NumberPicker noPickerHours;
NumberPicker noPickerMinutes;
TextView textViewTime;
Button button;
CounterClass timer;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
textViewTime = (TextView) findViewById(R.id.textView);
noPickerMinutes = (NumberPicker) findViewById(R.id.numberPicker2);
noPickerMinutes.setMaxValue(59);
noPickerMinutes.setMinValue(0);
noPickerHours = (NumberPicker) findViewById(R.id.numberPicker);
noPickerHours.setMaxValue(24);
noPickerHours.setMinValue(0);
button = (Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timer.start();
}
});
noPickerHours.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
timer = new CounterClass((newVal * 60 * 1000), 1000);
long millis = (newVal * 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)));
textViewTime.setText(hms);
}
});
noPickerMinutes.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
timer = new CounterClass((newVal * 60 * 1000), 1000);
long millis = (newVal * 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)));
textViewTime.setText(hms);
}
});
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
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() {
}
}}
最佳答案
您的代码的问题在于，更改值后，在NumberPicker和noPickerHours的noPickerMinutes对象中，都会调用setOnValueChangedListener()方法。如果更改noPickerHours选择器，则计时器设置为小时，如果更改noPickerMinutes选择器，则计时器设置为指定的分钟。因此，您更改的最后一个数字选择器将是计时器的值。
因此解决方案将是：
int hourPicked;
int minPicked; // declare both as instance variables otherwise will need to declare as final variables.
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// put your logic here to set the time with hourPicked and minPicked variables.
timer.start();
}
});
noPickerHours.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
hourPicked = newVal;
}
});
noPickerMinutes.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
minPicked = newVal;
}
});
希望这可以帮助。
关于java - 将两个数字选择器的值设置为倒数计时器的小时和分钟，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/34247817/