PendingIntent null當試圖從類中調用它

Im bulding一個鬧鐘，我得到一個pendingIntent，應該使鬧鐘暫停。當它在活動中時，相同的代碼工作得很好。我改變了一些東西，現在改成了另外一類。我得到一個nullpointerExecption。（承包商獲得從活動上下文PendingIntent null當試圖從類中調用它

暫停功能：

public void settingNewIntentForSnooze() { 
    PendingIntent alarmPendingIntent=null; 
    Calendar calendar = Calendar.getInstance(); 
    // new alarm after the snooze. 
    calendar.set(Calendar.MINUTE, calendar.get(Calendar.MINUTE) + snoozeTime); 
    Intent snoozeIntent = new Intent(context, Alarm_Reciver.class); 
    snoozeIntent.putExtra("click_status", true); 
    //add that to try to solve the problem... 
    snoozeIntent.setAction("Snooze"); 
    alarmPendingIntent = PendingIntent.getBroadcast(context, 0, snoozeIntent, alarmPendingIntent.FLAG_ONE_SHOT); 
    //tells to phone to set the alarm 
    alarm_manager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), alarmPendingIntent); 
}

AlarmPage活性（即外幣的變量的代碼）：

snooze= new Snooze(this,alarm_manager);

AlarmReciver：

public void onReceive(Context context, Intent intent) { 
    Log.e("in alarm reciver","in alarm reciver"); 
    Intent service_intent= new Intent(context, RingtonePlayingService.class);//intent for the service ringtone playing 
    boolean button_status = intent.getExtras().getBoolean("click_status"); 
    service_intent.putExtra("click_status", button_status);//passing button status 
    context.startService(service_intent);//start the ringtone service 
}

錯誤：

09-17 18:25:25.564 1563-1563/com.example.itay.newfrindlyalarm E/AndroidRuntime: FATAL EXCEPTION: main 
                      Process: com.example.itay.newfrindlyalarm, PID: 1563 
                      java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.AlarmManager.set(int, long, android.app.PendingIntent)' on a null object reference 
                       at com.example.itay.newfrindlyalarm.Snooze.settingNewIntentForSnooze(Snooze.java:60) 
                       at com.example.itay.newfrindlyalarm.Snooze.operate(Snooze.java:44) 
                       at com.example.itay.newfrindlyalarm.AlarmPage.operateSnooze(AlarmPage.java:88) 
                       at com.example.itay.newfrindlyalarm.AlarmPage$3.onClick(AlarmPage.java:68) 
                       at android.view.View.performClick(View.java:6256) 
                       at android.view.View$PerformClick.run(View.java:24697) 
                       at android.os.Handler.handleCallback(Handler.java:789) 
                       at android.os.Handler.dispatchMessage(Handler.java:98) 
                       at android.os.Looper.loop(Looper.java:164) 
                       at android.app.ActivityThread.main(ActivityThread.java:6541) 
                       at java.lang.reflect.Method.invoke(Native Method) 
                       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 
enter code here

來源

2017-09-17 Nakash.i

爲什麼你要在第一行定義'alarmPendingInten = null'，但是當你可以'getBroadcast'後再覆蓋它呢？這是不好的風格:) –

'settingNewIntentForSnooze'方法中'context'的值是什麼？它有很好的價值嗎？ –

請添加您的錯誤信息。這是很難調試代碼沒有看到錯誤:) –

根據錯誤信息判斷，有沒有可能alarm_manager是null？如果您正確初始化AlarmManager，錯誤會消失嗎？

來源

2017-09-17 16:24:36

是的，我剛剛創建了一個貪睡對象，然後才初始化我輸入到他的構造函數中的AlarmManager ..我花了兩個小時處理這個錯誤，現在我看到了它的簡單性。非常感謝！ –

PendingIntent null當試圖從類中調用它

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