[英]App crashing when sending pending intent Alarm Manager
理想情况下,我想在应用程序暂停时调用,但是为了使它正常工作,我从一个按钮调用该方法。 我在ArrayList中有一个ArrayList,如果该列表和项目设置为活动状态,则该列表具有我希望发送给警报管理器的时间列表。 如果有人可以帮助我弄清为什么会失败,我将不胜感激。
这是我的代码:
public class ReminderList extends AppCompatActivity {
public static ArrayList<ReminderType> AllReminders=new ArrayList<>();
public reminderCAdapter adapter;
public static ReminderType currentReminderType;
public static ItemType currentItemType;
public static TimeType currentTimesType;
Context context;
AlarmManager alarmMan;
PendingIntent pIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.context=this;
setContentView(R.layout.activity_reminder_list);
//generate list
try {
LoadData();
} catch (IOException | ClassNotFoundException | JSONException e) {
e.printStackTrace();
}
alarmMan=(AlarmManager) getSystemService(ALARM_SERVICE);
adapter=new reminderCAdapter(AllReminders,this);
//handle listview and assign adapter
ListView lView = (ListView)findViewById(R.id.listView);
lView.setAdapter(adapter);
}
//Iterates through all reminders to see if reminder is enabled and if item is enabled and has a time
public void CheckAllActiveReminders(View view){
//Go through each reminder
Log.e("1", "1");
for(int i=0;i<AllReminders.size();i++){
//if the reminder is active continue
Log.e("2", "1");
if(AllReminders.get(i).ReminderActive){
//Go through each item
Log.e("3", "1");
for (int j=0;j<AllReminders.get(i).Items.size();j++){
//if the item is active
Log.e("4", "1");
if(AllReminders.get(i).Items.get(j).ItemActive){
//Go through each timetype
Log.e("5", "1");
for (int h=0;h<AllReminders.get(i).Items.get(j).Times.size();h++){
Log.e("6", "1");
Intent rIntent=new Intent(this.context, Alarm_Receiver.class);
Log.e("7", "1");
pIntent=PendingIntent.getBroadcast(ReminderList.this,0, rIntent,PendingIntent.FLAG_UPDATE_CURRENT);
Log.e("8", AllReminders.get(i).ReminderName+", "+AllReminders.get(i).Items.get(j).ItemName+", "+AllReminders.get(i).Items.get(j).Times.get(h).displayTime);
alarmMan.set(AlarmManager.RTC_WAKEUP,AllReminders.get(i).Items.get(j).Times.get(h).cal.getTimeInMillis(),pIntent);
}
}else{
//If item is deactivated all times in it need to be cancelled
Log.e("Fail 2", "1");
}
}
}else{
//if reminder is not active all items in it need to be deactivated
Log.e("Fail 1", "1");
}
}
}
}
我一直可以确认,直到出现alarmMan.set为止,因为日志显示了它。 这是堆栈跟踪:
10/1 19:26:01.059 11560-11560 / com.example.poods.remindmeandlogit E / 8:提醒,项目,晚上7:25 10-01 19:26:01.059 11560-11560 / com.example.poods.remindmeandlogit E / AndroidRuntime:致命例外:主进程:com.example.poods.remindmeandlogit,PID:11560 java.lang.IllegalStateException:无法执行android:onClick的方法:android.support.v7.app.AppCompatViewInflater $ DeclaredOnClickListener.onClick( android.view.View.performClick(View.java:4438)上的AppCompatViewInflater.java:293)android.os.Handler.handleCallback(Handler.java)上android.view.View $ PerformClick.run(View.java:18422)上的Java上的android.os.Handler.dispatchMessage(Handler.java:95)上的:733)(java.android.app.ActivityThread.main(ActivityThread.java:5017)上的android.os.Looper.loop(Looper.java:136)上的.lang.reflect.Method.invokeNative(本地方法)(位于java.lang.reflect.Method.invoke(Method.java:515)位于com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779)在com.android.internal.os.ZygoteInit.main( dalvik.system.NativeStart.main(本机方法)处的ZygoteInit.java:595)原因:java.lang.reflect.Method上java.lang.reflect.Method.invokeNative(本机方法)处的java.lang.reflect.InvocationTargetException .invoke(Method.java:515)在android.support.v7.app.AppCompatViewInflater $ DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)在android.view.View.performClick(View.java:4438)在android.view。 View $ PerformClick.run(View.java:18422)在android.os.Handler.handleCallback(Handler.java:733)在android.os.Handler.dispatchMessage(Handler.java:95)在android.os.Looper.loop (Looper.java:136)在android.app.ActivityThread.main(ActivityThread.java:5017)在java.lang.reflect.Method.invokeNative(本机方法)在java.lang.reflect.Method.invoke(Method.java :515)在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)在dalvik.system.NativeStart。 main(本机方法)由:java.lang。 com.example.poods.remindmeandlogit.ReminderList.CheckAllActiveReminders(ReminderList.java:84)处的NullPointerException位于java.lang.reflect.Method.invokeNative(Native Method)处的java.lang.reflect.Method.invoke(Method.java:515) ),位于android.view.View $ PerformClick.run(View.View)上。的android.os.Handler.handleCallback(Handler.java:733)的java:18422),android.os.Looper.loop(Looper.java:136)的android.os.Handler.dispatchMessage(Handler.java:95)的com.android的java.lang.reflect.Method.invokeNative(本机方法)处的android.app.ActivityThread.main(ActivityThread.java:5017)。内部的os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:779)在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)在dalvik.system.NativeStart.main(本机方法)
Caused by: java.lang.NullPointerException at com.example.poods.remindmeandlogit.ReminderList.CheckAllActiveReminders(ReminderList.java:84)
什么是第84行?,您正在那里访问一个空对象。 请参阅什么是NullPointerException,以及如何解决它?
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