Question

嘿，所以我一直在创建一个在用户指定的时间发送每周通知的应用程序。

我已经按照了大量的教程，似乎一遍又一遍地阅读同样的内容，我似乎无法让它发挥作用。当我调用新意图时，我的应用程序崩溃了。难道我做错了什么？这是完成这项任务的正确方法吗？

public class AlarmService extends Activity
{ 

    /// unimportant working code not added

    Intent mintent = new Intent(context, mBroadcastReceiver.class);
    Log.d(TAG, "Got Intent");
    /// I receive a log just before this portion but do not receive this one

    startActivity(PAintent);
    Log.d(TAG, "StartActivity(intent)");

    PendingIntent mPendingIntent = PendingIntent.getActivity(getApplicationContext(), ALARMID,
        mintent, PendingIntent.FLAG_CANCEL_CURRENT);
    Log.d(TAG, "Got Pending intent");

    AlarmManager mAlarm = (AlarmManager) getSystemService(ALARM_SERVICE);
    Log.d(TAG, "Got alarmmanager");

    ///// remember to change time back to: (7 * 24 * 60 * 60 * 1000)
    mAlarm.setRepeating(AlarmManager.RTC_WAKEUP,
    ALARM_TIME.getTimeInMillis(), (30 * 1000),
    mPendingIntent);
    Log.d(TAG, "Made Pending intent");
    ...
}

请记住，我在此代码中重命名了我的intent，pendingintent和alarm manager，以便于阅读！

我一直收到空指针异常，我的调试看起来像这样：

03-05 13:20:45.132: E/AndroidRuntime(12734): FATAL EXCEPTION: main
03-05 13:20:45.132: E/AndroidRuntime(12734): java.lang.NullPointerException
03-05 13:20:45.132: E/AndroidRuntime(12734):    at android.content.ComponentName.<init>(ComponentName.java:75)
03-05 13:20:45.132: E/AndroidRuntime(12734):    at android.content.Intent.<init>(Intent.java:2720)
03-05 13:20:45.132: E/AndroidRuntime(12734):    at com.theStudyBuddy.Ignite.AlarmService.PlannerAssistantOn(AlarmService.java:148)
03-05 13:20:45.132: E/AndroidRuntime(12734):    at com.theStudyBuddy.Ignite.EditScheduleActivity.saveClass(EditScheduleActivity.java:635)
03-05 13:20:45.132: E/AndroidRuntime(12734):    at com.theStudyBuddy.Ignite.EditScheduleActivity.onClick(EditScheduleActivity.java:583)
03-05 13:20:45.132: E/AndroidRuntime(12734):    at android.view.View.performClick(View.java:2485)

......等等

如果有人能指出我的错误，将非常感谢！

Answer 1

startActivity（PAintent）; PAintent在哪里？你创造它吗？

要启动预定活动：您可以看到以下链接： Android : AlarmManager not start

对于AlarmManager的Intent有问题

1 个答案: