我目前正在使用AndroidStudio中的AlarmClock。我的项目在我的模拟器上完全正常工作，这意味着当我从我的TimePicker中选择一个时间时，闹钟会在所选择的时间响起，这很可能是它应该如何。但是，如果我在真正的Android手机上运行应用程序，闹钟会立即响起，并且根本不考虑我的TimePicker。 也许有人可以告诉我什么是错的，因为它可以在模拟器上运行但不能在我的真实手机上运行？ 我在某处看到它可能与“alarmmanager.set”有关，我选择了“calendar.getTimeInMillis（）”。但我很困惑的是它应该是什么，以及为什么它在我的模拟器上工作但不在我的真实手机上。 请麻烦帮助一个菜鸟！
这是主要的课程：
public class SleepActivity extends AppCompatActivity {
AlarmManager alarmmanager;
TimePicker alarmtimepicker;
PendingIntent pendingintent;
private SleepRepository sp;
private Date date;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sleep);
sp = new SleepRepository(SleepActivity.this);
date = new Date();
//Create an Intent to the Receiver Class
final Intent receiver = new Intent(getApplicationContext(), AlarmReceiver.class);
alarmmanager = (AlarmManager) getSystemService(ALARM_SERVICE);
final Calendar calendar = Calendar.getInstance();
alarmtimepicker = (TimePicker) findViewById(R.id.sleep_timepicker);
alarmtimepicker.setIs24HourView(true);
// Initializing the two Buttons in activity_sleep.xml
Button startsleep = (Button) findViewById(R.id.sleep_startlog_button);
Button endsleep = (Button) findViewById(R.id.sleep_endlog_button);
final SleepRepository database = new SleepRepository(SleepActivity.this);
final Date date = new Date();
List<Sleep> sleepList = database.getAllRecords();
Log.v("MOINMOINMOIN", "HALLO HALLO HALLO");
Log.v("SleepActivity", sleepList.toString());
// onClickListener for the two Buttons in activity_sleep.xml
startsleep.setOnClickListener(new View.OnClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onClick(View v) {
database.insertRecord(33.0, date, 33);
//Setting Calendar instance with the Hour and Minute that we have picked on the TimePicker
int currentApiVersion = android.os.Build.VERSION.SDK_INT;
if (currentApiVersion > android.os.Build.VERSION_CODES.LOLLIPOP_MR1){
calendar.set(Calendar.HOUR_OF_DAY, alarmtimepicker.getHour());
calendar.set(Calendar.MINUTE, alarmtimepicker.getMinute());
} else {
calendar.set(Calendar.HOUR_OF_DAY, alarmtimepicker.getCurrentHour());
calendar.set(Calendar.MINUTE, alarmtimepicker.getCurrentHour());
}
//Put in extra String into Receiver Intent
//Tells the Clock that you have pressed the "Go to Bed" button
receiver.putExtra("extra", "alarm on");
//Create a pending Intent that delays the Intent until the specified Calendar-Time
pendingintent = PendingIntent.getBroadcast(getApplicationContext(), 0, receiver, PendingIntent.FLAG_UPDATE_CURRENT);
//Set the AlarmManager
alarmmanager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingintent);
}
});
endsleep.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Put in extra String into Receiver Intent
//Tells the clock that you have pressed the "Wake Up" button
receiver.putExtra("extra", "alarm off");
//Stop the Ringtone
sendBroadcast(receiver);
alarmmanager.cancel(pendingintent);
}
});
这是我的BroadcastReceiver：
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.e("We are in the Receiver!", "yay");
//fetch extra Strings from intent
String get_your_string = intent.getExtras().getString("extra");
Log.e("What is the key??", get_your_string);
//Create an Intent for the RingtoneService
Intent service_intent = new Intent(context, RingtoneService.class);
//pass the extra Strings from SleepActivity to the Ringtone Playing Service
service_intent.putExtra("extra", get_your_string);
//Start the Ringtone Service
context.startService(service_intent);
}
}
最后我的RingtoneService告诉媒体播放器播放铃声：
public class RingtoneService extends Service {
MediaPlayer media;
String message;
boolean isRunning;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("LocalService", "Receive start id" + startId + ":" + intent);
//fetch the extra String Values
String state = intent.getExtras().getString("extra");
// assert = If there is a "NullPointerException", then do not go through the code below
Log.e("Ringtone extra is", state);
// assert state != null;
//this converts the extra Strings from the intent to start ID's, value 0 or 1;
switch (state) {
case "alarm on":
startId = 1;
break;
case "alarm off":
startId = 0;
break;
default:
startId = 0;
break;
}
// if else - statements to either start or stop the ringtone
//if there is no music playing, and the user pressed "Go to Sleep"
//Music should start playing.
if (!this.isRunning && startId == 1) {
Log.e("there is no music", "and it should play");
//Create an Instance of the MediaPlayer and start it
media = MediaPlayer.create(this, R.raw.ringtone);
media.start();
this.isRunning = true;
startId = 0;
}
//if there is music playing, and the user pressed "Wake up"
//Music should stop playing.
else if (this.isRunning && startId == 0) {
Log.e("there is no music", "and it should not play");
//stop the ringtone
media.stop();
media.reset();
this.isRunning = false;
startId = 0;
}
//these are if the user presses random buttons
//bug-preventive
//if there is no music playing, and the user pressed "Wake Up"
//do nothing.
else if (!this.isRunning && startId == 0) {
Log.e("there is no music", "and it should not play");
this.isRunning = false;
startId = 0;
}
//if there is music playing, and the user pressed "Go to sleep"
//do nothing.
else if (this.isRunning && startId == 1) {
Log.e("there is music", "and it should play");
this.isRunning = true;
startId = 1;
}
//catch the odd event.
else {
Log.e("else", "somehow you reached this");
}
return START_NOT_STICKY;
}