我正在Android中制作一个项目。
当我在活动（groups.class）中时，我正在调用这个函数（在活动中声明）：
public void lookForGroups()
{
int seconds = 20;
Intent myIntent = new Intent(Groups.this, GroupsTaskAlarmChecker.class);
pendingIntent = PendingIntent.getService(Groups.this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), seconds * 1000, pendingIntent);
}
在服务内部，我连接到 web 中的 php 并接收答案，然后创建一个通知（在服务内部声明），将消息发送到调用函数 notifyNew() 的处理程序。
public class GroupsTaskAlarmChecker extends Service implements Runnable {
public void run() { php call and send msg to handler to call notify function}
private void notifyNew() {
Intent intentNot = new Intent(this, Groups.class);
Notification notification = new Notification(R.drawable.icon, "changes", System.currentTimeMillis());
notification.setLatestEventInfo(this, getString(R.string.app_name), getString(R.string.notifiedGroup),
PendingIntent.getActivity(this, 0, intentNot, PendingIntent.FLAG_CANCEL_CURRENT));
notification.defaults |= Notification.DEFAULT_SOUND;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_LIGHTS;
notification.flags = Notification.FLAG_AUTO_CANCEL;
try
{
notification.ledARGB = 0xff00ff00;
notification.ledOnMS = 300;
notification.ledOffMS = 1000;
notification.flags |= Notification.FLAG_SHOW_LIGHTS;
}catch(Exception ex)
{
}
manager.notify(APP_ID_NOTIFICATION, notification);
}
}
触摸通知时，我想再次进入活动“组”。所有这一切都很好，但是当我触摸通知 logCat 时显示......
03-01 17:52:50.663: E/AndroidRuntime(17019): FATAL EXCEPTION: main
03-01 17:52:50.663: E/AndroidRuntime(17019): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.org.tfc_android/com.org.tfc_android.Groups}: java.lang.NullPointerException
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2304)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2354)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.access$600(ActivityThread.java:150)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.os.Handler.dispatchMessage(Handler.java:99)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.os.Looper.loop(Looper.java:137)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.main(ActivityThread.java:5193)
03-01 17:52:50.663: E/AndroidRuntime(17019): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 17:52:50.663: E/AndroidRuntime(17019): at java.lang.reflect.Method.invoke(Method.java:511)
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
03-01 17:52:50.663: E/AndroidRuntime(17019): at dalvik.system.NativeStart.main(Native Method)
03-01 17:52:50.663: E/AndroidRuntime(17019): Caused by: java.lang.NullPointerException
03-01 17:52:50.663: E/AndroidRuntime(17019): at com.org.tfc_android.Groups.onCreate(Groups.java:61)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.Activity.performCreate(Activity.java:5104)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
03-01 17:52:50.663: E/AndroidRuntime(17019): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2258)
03-01 17:52:50.663: E/AndroidRuntime(17019): ... 11 more
有一个强制关闭，但后来转到活动组有人可以帮助我吗？
已解决：已解决添加 intentNot.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); 在通知之前创建意图时。