While programming a countdown script into the status bar but I still keep forced closes when i call the
function OnClickListener destroy to kill the application).
I think something is wrong with the ‘myNotificationManager.cancel(1);’ but I can’t figure out whats the mistake.
Here is my code
public class ZaagmanActivity extends Activity {
public Handler handler = new Handler();
public NotificationManager myNotificationManager;
private static final int NOTIFICATION_ID = 1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button)findViewById(R.id.refresh);
button.setOnClickListener(refresh);
Button button1 = (Button)findViewById(R.id.destroy);
button1.setOnClickListener(destroy);
Button button2 = (Button)findViewById(R.id.counter);
button2.setOnClickListener(counter);
//test
}
private void GeneratNotification(){
myNotificationManager =
(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
CharSequence NotificationTicket = "Counter gestart";
CharSequence NotificationTitle = "Zaagmans Counter";
CharSequence NotificationContent = Nextwedsmall();
long when = System.currentTimeMillis();
Notification notification = new Notification(R.drawable.poppetje,NotificationTicket, when);
Context context = getApplicationContext();
Intent notificationIntent = new Intent(this,ZaagmanActivity.class);
PendingIntent contentIntent =
PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, NotificationTitle,
NotificationContent, contentIntent);
myNotificationManager.notify(NOTIFICATION_ID, notification);
}
private OnClickListener destroy = new OnClickListener() {
public void onClick(View v) {
System.out.println("Closing");
myNotificationManager.cancel(1);
handler.removeCallbacks(notification);
finish();
}
};
private OnClickListener counter = new OnClickListener() {
public void onClick(View v) {
notification.run();
}
};
private OnClickListener refresh = new OnClickListener() {
public void onClick(View v) {
refresh();
Button button1 = (Button)findViewById(R.id.destroy);
button1.setOnClickListener(destroy);
;
}
};
private final Runnable showtext = new Runnable() {
public void run() {
TextView t=new TextView(getApplicationContext());
t=(TextView)findViewById(R.id.t);
t.setText(Nextwed());
handler.postDelayed(this, 500);
}
};
private final Runnable notification = new Runnable() {
public void run() {
GeneratNotification();
handler.postDelayed(this, 500);
}
};
public Calendar Nextwednesday(int dow){
Calendar date = Calendar.getInstance();
int diff = dow - date.get(Calendar.DAY_OF_WEEK);
if (!(diff > 0)) {
diff += 7;
}
date.add(Calendar.DAY_OF_MONTH, diff);
date.set(Calendar.HOUR_OF_DAY, 12);
System.out.println(date);
return date;
} public String Nextwedsmall() {
//
long wednes = Nextwednesday(Calendar.WEDNESDAY).getTimeInMillis();
System.out.println(wednes);
Date date = new Date(); // given date
Calendar date2 = GregorianCalendar.getInstance(); // creates a new calendar instance
date2.setTime(date);
long now = date2.getTimeInMillis();
long zaagmans = wednes - now;
System.out.println("time "+date2.getTime());
long Hour = date2.get(Calendar.HOUR_OF_DAY);
Hour = Hour -2;
long Minute = date2.get(Calendar.MINUTE);
long Seconds = date2.get(Calendar.SECOND);
long mSeconds = date2.get(Calendar.MILLISECOND);
float total = (mSeconds + (1000*Seconds) + (60*1000 * Minute) + (60*60*1000 * Hour));
zaagmans = (long) (zaagmans - total + (11*60*60*1000));
long days = zaagmans / (1000*60*60*24);
long hours = zaagmans / (1000*60*60) ;
long mins = zaagmans / (1000*60) ;
long secs = zaagmans / 1000 ;
long dd = days;
long hh = hours - days * 24;
long mm = mins - hours * 60;
long ss = secs - mins * 60;
System.out.println(date2);
date2.clear();
return (dd+" dag(en), "+hh+" uur(en), "+mm+" minuten en "+ss+" seconden");
}
public String Nextwed() {
//
long wednes = Nextwednesday(Calendar.WEDNESDAY).getTimeInMillis();
System.out.println(wednes);
Date date = new Date(); // given date
Calendar date2 = GregorianCalendar.getInstance(); // creates a new calendar instance
date2.setTime(date);
long now = date2.getTimeInMillis();
long zaagmans = wednes - now;
System.out.println("time "+date2.getTime());
long Hour = date2.get(Calendar.HOUR_OF_DAY);
Hour = Hour - 13;
long Minute = date2.get(Calendar.MINUTE);
long Seconds = date2.get(Calendar.SECOND);
long mSeconds = date2.get(Calendar.MILLISECOND);
float total = (mSeconds + (1000*Seconds) + (60*1000 * Minute) + (60*60*1000 * Hour));
zaagmans = (long) (zaagmans - total);
long days = zaagmans / (1000*60*60*24);
long hours = zaagmans / (1000*60*60) ;
long mins = zaagmans / (1000*60) ;
long secs = zaagmans / 1000 ;
long dd = days;
long hh = hours - days * 24;
long mm = mins - hours * 60;
long ss = secs - mins * 60;
System.out.println(date2);
date2.clear();
return ("Dagen: "+dd+", Uren: "+hh+", Minuten: "+mm+", Seconden: "+ss+" ");
}
public void refresh(){
Calendar calendar = Calendar.getInstance();
int day = calendar.get(Calendar.DAY_OF_WEEK);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
hour = hour + 2;
if(day==4 && hour >= 12){
System.out.println("woensdag");
setContentView(R.layout.zaagmans);
}
else if(day==5){
System.out.println("donderdag");
setContentView(R.layout.zaagmans);
}
else if(day==6 && hour <= 17){
System.out.println("vrijdag");
setContentView(R.layout.zaagmans);
}
else if(day==6 && hour > 17){
System.out.println("vrijdag");
setContentView(R.layout.weekend);
}
else if(day==7 || day==1){
System.out.println("Weekend");
setContentView(R.layout.weekend);
}
else{
setContentView(R.layout.jammer);
showtext.run();
}
}
}
And here is my log
10-25 14:03:21.200: W/dalvikvm(12287): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
10-25 14:03:21.210: E/AndroidRuntime(12287): FATAL EXCEPTION: main
10-25 14:03:21.210: E/AndroidRuntime(12287): java.lang.NullPointerException
10-25 14:03:21.210: E/AndroidRuntime(12287): at nl.zaagmans.ZaagmanActivity$5.run(ZaagmanActivity.java:128)
10-25 14:03:21.210: E/AndroidRuntime(12287): at nl.zaagmans.ZaagmanActivity$2.onClick(ZaagmanActivity.java:93)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.view.View.performClick(View.java:2532)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.view.View$PerformClick.run(View.java:9293)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.os.Handler.handleCallback(Handler.java:587)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.os.Handler.dispatchMessage(Handler.java:92)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.os.Looper.loop(Looper.java:143)
10-25 14:03:21.210: E/AndroidRuntime(12287): at android.app.ActivityThread.main(ActivityThread.java:4263)
10-25 14:03:21.210: E/AndroidRuntime(12287): at java.lang.reflect.Method.invokeNative(Native Method)
10-25 14:03:21.210: E/AndroidRuntime(12287): at java.lang.reflect.Method.invoke(Method.java:507)
10-25 14:03:21.210: E/AndroidRuntime(12287): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-25 14:03:21.210: E/AndroidRuntime(12287): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-25 14:03:21.210: E/AndroidRuntime(12287): at dalvik.system.NativeStart.main(Native Method)
The line
returns null, because your run method isn’t in a scope of any layout file. The code doesn’t make any sense btw, as you’re creating an object and assign it to
tright before doing this assignment.And please don’t post your full source code, only post the relevant parts.