這裏是以下代碼:如何從Android中的新版本中的BroadcastReceiver中的Intent中複製數據?
public class NotificationsReceiver extends BroadcastReceiver {
public static final String INTENT_EXTRA_NOTIFICATION_INFO="intent_extra_notification_info";
@Override
public void onReceive(Context context, Intent intent) {
NotificationInfo info=(NotificationInfo)intent.getSerializableExtra(INTENT_EXTRA_NOTIFICATION_INFO);
NotificationTextInfo fields=DataSourceWrapper.getInstance().getNotificationTextInfo(info);
NotificationManager manager=(NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification=new Notification(android.R.drawable.alert_dark_frame, "1", info.getId());
notification.when=new Date().getTime();
notification.setLatestEventInfo(context, fields.getTitle(), fields.getDescription(), null);
manager.notify((int)info.getId(), notification);
}
}
BroadcastReceiver
存在AlarmManager
。 當它第一次工作的時候一切都很好,但是當它第二次執行時,當我從Intent
得到一些信息時,它會連續顯示一個NullPointerException
,因此Intent
在第一次執行後將會清除。
現在我的問題是:如何將Intent
的數據複製到新的數據中以修復NullPointerException
?
的logcat:
01-23 17:00:00.578: E/receiver(8442): receive
01-23 17:00:00.608: E/AndroidRuntime(8442): FATAL EXCEPTION: main
01-23 17:00:00.608: E/AndroidRuntime(8442): java.lang.RuntimeException: Unable to start receiver com.ulnda.mypsych.receivers.NotificationsReceiver: java.lang.NullPointerException
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2408)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.app.ActivityThread.access$1500(ActivityThread.java:139)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1321)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.os.Handler.dispatchMessage(Handler.java:99)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.os.Looper.loop(Looper.java:154)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.app.ActivityThread.main(ActivityThread.java:4945)
01-23 17:00:00.608: E/AndroidRuntime(8442): at java.lang.reflect.Method.invokeNative(Native Method)
01-23 17:00:00.608: E/AndroidRuntime(8442): at java.lang.reflect.Method.invoke(Method.java:511)
01-23 17:00:00.608: E/AndroidRuntime(8442): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-23 17:00:00.608: E/AndroidRuntime(8442): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-23 17:00:00.608: E/AndroidRuntime(8442): at dalvik.system.NativeStart.main(Native Method)
01-23 17:00:00.608: E/AndroidRuntime(8442): Caused by: java.lang.NullPointerException
01-23 17:00:00.608: E/AndroidRuntime(8442): at com.ulnda.mypsych.db.DataSourceWrapper.getNotificationTextInfo(DataSourceWrapper.java:68)
01-23 17:00:00.608: E/AndroidRuntime(8442): at com.ulnda.mypsych.receivers.NotificationsReceiver.onReceive(NotificationsReceiver.java:27)
01-23 17:00:00.608: E/AndroidRuntime(8442): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2397)
01-23 17:00:00.608: E/AndroidRuntime(8442): ... 10 more
請添加logcat輸出。 – rekire
請檢查更新 – user1841247