我遇到的问题是我正在尝试接收用户输入，以比较用户通过提交按钮和datepicker，timepicker和numberpick（秒）提交和提交的预定日期和时间。
当用户按下提交时，该信息将被设置到日历对象中，并且应用程序始终循环通过IOIOlooper以检查是否应该调用事件（例如，打开引脚以打开灯）。
如有任何问题，疑虑或需要澄清，请随时告诉我。
*编辑：此外，应用程序立即崩溃并在logcat中产生空指针错误。
谢谢你们;
主要活动此活动是程序的主要活动，它在应用程序启动时运行，它是IOIOActivity的扩展，用于连接IOIO板：
now = new Time();
eventCalendar = eventCalendar.getInstance();
eventCalendar.set(0,0,0,0,0,0);
submitEvent = (Button) findViewById(R.id.submit);
// Wakelock
PowerManager powerManageDevice = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLockDevice = powerManageDevice.newWakeLock(
PowerManager.FULL_WAKE_LOCK, "Wakelocking the Scheduler");
super.onCreate(savedInstanceState);
wakeLockDevice.acquire();
setContentView(R.layout.activity_main);
chooseDay = (DatePicker) findViewById(R.id.datepicker1);
chooseTime = (TimePicker) findViewById(R.id.timepicker1);
togglePin = (ToggleButton) findViewById(R.id.ledtoggle);
chosePin1 = (NumberPicker) findViewById(R.id.pinpick1);
chosePin1.setMaxValue(46);
chosePin1.setMinValue(1);
chosePin2 = (NumberPicker) findViewById(R.id.pinpick2);
chosePin2.setMaxValue(46);
chosePin2.setMinValue(1);
chosePin3 = (NumberPicker) findViewById(R.id.pinpick3);
chosePin3.setMaxValue(46);
chosePin3.setMinValue(1);
chosePin4 = (NumberPicker) findViewById(R.id.pinpick4);
chosePin4.setMaxValue(46);
chosePin4.setMinValue(1);
chosePin5 = (NumberPicker) findViewById(R.id.pinpick5);
chosePin5.setMaxValue(46);
chosePin5.setMinValue(1);
chosePin6 = (NumberPicker) findViewById(R.id.pinpick6);
chosePin6.setMaxValue(46);
chosePin6.setMinValue(1);
chosePin7 = (NumberPicker) findViewById(R.id.pinpick7);
chosePin7.setMaxValue(46);
chosePin7.setMinValue(1);
chosePin8 = (NumberPicker) findViewById(R.id.pinpick8);
chosePin8.setMaxValue(46);
chosePin8.setMinValue(1);
chosePin9 = (NumberPicker) findViewById(R.id.pinpick9);
chosePin9.setMaxValue(46);
chosePin9.setMinValue(1);
secondPicker = (NumberPicker) findViewById(R.id.secondPicker);
secondPicker.setMaxValue(59);
secondPicker.setMinValue(0);
submitEvent.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
eventCalendar.set(chooseDay.getYear(), chooseDay.getMonth(), chooseDay.getDayOfMonth(), chooseTime.getCurrentHour(), chooseTime.getCurrentMinute(), secondPicker.getValue());
}
});
内班：
class Looper extends BaseIOIOLooper {
/** The on-board LED. */
private DigitalOutput led_;
private DigitalOutput pin1PWM;
private DigitalOutput pin2PWM;
private DigitalOutput pin3PWM;
private DigitalOutput pin4PWM;
private DigitalOutput pin5PWM;
private DigitalOutput pin6PWM;
private DigitalOutput pin7PWM;
private DigitalOutput pin10PWM;
private DigitalOutput pin11PWM;
private DigitalOutput pin12PWM;
private DigitalOutput pin13PWM;
private DigitalOutput pin14PWM;
private DigitalOutput pin27PWM;
private DigitalOutput pin28PWM;
private DigitalOutput pin34PWM;
private DigitalOutput pin35PWM;
private DigitalOutput pin36PWM;
private DigitalOutput pin37PWM;
private DigitalOutput pin38PWM;
private DigitalOutput pin39PWM;
private DigitalOutput pin40PWM;
/**
* private DigitalOutput pin1; private DigitalOutput pin2; private
* DigitalOutput pin3; private DigitalOutput pin4; private DigitalOutput
* pin5; private DigitalOutput pin6; private DigitalOutput pin7;
*/
private DigitalOutput pin8;
private DigitalOutput pin9;
/**
* private DigitalOutput pin10; private DigitalOutput pin11; private
* DigitalOutput pin12; private DigitalOutput pin13; private
* DigitalOutput pin14;
*/
private DigitalOutput pin15;
private DigitalOutput pin16;
private DigitalOutput pin17;
private DigitalOutput pin18;
private DigitalOutput pin19;
private DigitalOutput pin20;
private DigitalOutput pin21;
private DigitalOutput pin22;
private DigitalOutput pin23;
private DigitalOutput pin24;
private DigitalOutput pin25;
private DigitalOutput pin26;
// private DigitalOutput pin27;
// private DigitalOutput pin28;
private DigitalOutput pin29;
private DigitalOutput pin30;
private DigitalOutput pin31;
private DigitalOutput pin32;
private DigitalOutput pin33;
/**
* private DigitalOutput pin34; private DigitalOutput pin35; private
* DigitalOutput pin36; private DigitalOutput pin37; private
* DigitalOutput pin38; private DigitalOutput pin39; private
* DigitalOutput pin40;
*/
private DigitalOutput pin41;
private DigitalOutput pin42;
private DigitalOutput pin43;
private DigitalOutput pin44;
private DigitalOutput pin45;
private DigitalOutput pin46;
private DigitalOutput[] pinDigArray = { pin1PWM, pin2PWM, pin3PWM,
pin4PWM, pin5PWM, pin6PWM, pin7PWM, pin8, pin9, pin10PWM,
pin11PWM, pin12PWM, pin13PWM, pin14PWM, pin15, pin16, pin17,
pin18, pin19, pin20, pin21, pin22, pin23, pin24, pin25, pin26,
pin27PWM, pin28PWM, pin29, pin30, pin31, pin32, pin33,
pin34PWM, pin35PWM, pin36PWM, pin37PWM, pin38PWM, pin39PWM,
pin40PWM, pin41, pin42, pin43, pin44, pin45, pin46 };
/**
* Called every time a connection with IOIO has been established.
* Typically used to open pins.
*
* @throws ConnectionLostException
* When IOIO connection is lost.
*
* @see ioio.lib.util.AbstractIOIOActivity.IOIOThread#setup()
*/
@Override
protected void setup() throws ConnectionLostException {
led_ = ioio_.openDigitalOutput(0, true);
for (int i = 0; i < pinDigArray.length; i++) {
pinDigArray[i] = ioio_.openDigitalOutput(i + 1, false);
}
}
/**
* Called repetitively while the IOIO is connected.
*
* @throws ConnectionLostException
* When IOIO connection is lost.
*
* @see ioio.lib.util.AbstractIOIOActivity.IOIOThread#loop()
*/
@Override
public void loop() throws ConnectionLostException {
now.setToNow();
led_.write(!togglePin.isChecked());
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
for (int i = 0; i < pinDigArray.length; i++) {
if (chosePin1.getValue() == i + 1) {
if(now.monthDay == eventCalendar.DAY_OF_MONTH)
pinDigArray[i].write(true);
} else {
pinDigArray[i].write(false);
}
}
}
}
/**
* A method to create our IOIO thread.
*
* @see ioio.lib.util.AbstractIOIOActivity#createIOIOThread()
*/
@Override
protected IOIOLooper createIOIOLooper() {
return new Looper();
}
尝试编辑它：
public void loop() throws ConnectionLostException {
now.setToNow();
led_.write(!togglePin.isChecked());
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
for (int i = 0; i < pinDigArray.length; i++) {
if (chosePin1.getValue() == i + 1) {
if(now.compare(now, eventTime) == 0)
pinDigArray[i].write(true);
} else {
pinDigArray[i].write(false);
}
}
我将日历更改为另一个计时器对象，我试图只比较这两个值。我将eventTime对象实例化为全0。
* 3rd Edit：我也完全删除了条件语句，它仍然崩溃;我不认为循环/检查语句是导致此问题的原因。
我得到：Java Runtime异常：无法启动Activity ComponentInfo
解决了它：
我只需要删除顶部全部为零的实例化： eventCalendar.set（0,0,0,0,0,0）;
也; Time.compare（现在，eventTime）== 0是更好的比较。
答案 0 :(得分：0)
if（now.monthDay == eventCalendar.DAY_OF_MONTH）是你的问题。
eventCalendar.DAY_OF_MONTH将始终等于5，因为它是常量。你想这样做：if（now.monthDay == eventCalendar.get（Calendar.DAY_OF_MONTH））