Android Time

API maju vzdy referencnu prirucku ("reference")
https://developer.android.com/reference/java/util/ Date.html
pisu zevraj

This method was deprecated in API level 1. As of JDK version 1.1, replaced by Calendar.get(Calendar.HOUR_OF_DAY).

neviem ci to je tvoj problem. Snad si to date aj naplnil niecim v tej slucke a netestujes furt cas spustenia programu.

Bohužel to nefunguje tady je log

07-25 17:00:45.755: E/AndroidRuntime(9541): 	... 10 more
07-25 17:03:36.158: E/AndroidRuntime(9846): FATAL EXCEPTION: main
07-25 17:03:36.158: E/AndroidRuntime(9846): Process: com.example.cron, PID: 9846
07-25 17:03:36.158: E/AndroidRuntime(9846): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.cron/com.example.cron.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Calendar.get(int)' on a null object reference
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2255)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2317)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.access$800(ActivityThread.java:143)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1258)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.os.Handler.dispatchMessage(Handler.java:102)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.os.Looper.loop(Looper.java:135)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.main(ActivityThread.java:5070)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at java.lang.reflect.Method.invoke(Native Method)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at java.lang.reflect.Method.invoke(Method.java:372)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:836)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:631)
07-25 17:03:36.158: E/AndroidRuntime(9846): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Calendar.get(int)' on a null object reference
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.example.cron.MainActivity.onCreate(MainActivity.java:18)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.Activity.performCreate(Activity.java:5720)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1102)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2208)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	... 10 more

ten dat sa nenaplni sam od seba.

(inac imho ta slucka bude vytazovat CPU a vybije baterku, ale nemam skusenosti teraz s androidom moc. Ale urcite je iny normalnejsi spsob jak to urobit s pomocou nejakeho api callbacku)

.. priklad na ten calendar s aktualnym datumom (Date) napr. tu
https://stackoverflow.com/questions/907170/java-ge tminutes-and-gethours

Bingo

	Date dt = new Date();	
		while (true){
			int actHodiny=dt.getHours();
			int actMinuty=dt.getMinutes(); 
		if (16==actHodiny && 40==actMinuty){	
		Start();
		
		}
		}

už to nepadá

Ale stale je to blbo.

Nepadá, ale fungovat taky nebude.

Daj za to while toto
dt.setTime(System.currentTimeMillis());
ale ako som uz pisal takyto pristup je imho prasiaren na entu.

Protoze ten Calendar object je null - prazdny...

https://developer.android.com/reference/java/util/ Calendar.html

Ten "tvůj" kód nefunguje ani na normální Javě.

Date date = new Date();