java - BOOT_COMPLETED 后无法启动 Intent

Question

我有一个关于重新安排任务的问题(带警报)我试图在未来的确切时间和日期设置任务然后我关闭了模拟器然后在等待弹出布局之后重新打开它当时间和日期到期时，我收到错误消息，提示无法在屏幕上打开(应用程序/Activity )，在 logcat 中我也看不到错误(可能是应用程序已关闭)，所以我不确定我到底在哪里做错了。

这是我用于服务的代码

public class ChibiReminderService extends WakefulIntentService {
 Date date;
 private long milliseconds = 0;
 public ChibiReminderService() {
        super("ChibiReminderService");`
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        DatabaseSched db = DatabaseSched.getInstance(this); //get access to the instance of DatabaseSched
        sched_lists alarm = new sched_lists();

        List<DatabaseSource> tasks = db.getListSched(); //Get a list of all the tasks there
        for (DatabaseSource task : tasks) {
            // Cancel existing alarm
            alarm.cancelAlarm(this, task.getId());
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm a");

             try {
                  date = format.parse(task.getDueDateTime());
                 milliseconds = date.getTime();
             } catch (Exception e) {
                 e.printStackTrace();
             }

            //regular alarms
            if(milliseconds >= System.currentTimeMillis()){
                alarm.setAlarm(this, task.getId());
            }
        }
        super.onHandleIntent(intent);
    }
}

OnBootReceiver

public class OnBootReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub
    WakefulIntentService.acquireStaticLock(context); //acquire a partial WakeLock
    context.startService(new Intent(context, ChibiReminderService.class)); //start ChibiReminderService
 }

}

list

  <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.majimechibireminder2"
    android:versionCode="1"
    android:versionName="1.0" android:installLocation="preferExternal">

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" android:persistent="true">
      <receiver android:name=".OnBootReceiver" >
         <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
         </intent-filter>
     </receiver>

      <receiver android:name=".AlarmReceiver"></receiver>
       <service android:name=".ChibiReminderService" >
     </service>

在这里

Answer 1

您需要在缺少的数据库连接上显式调用close，因此将其添加到getListSched 函数的末尾

List<DatabaseSource> getListSched(){
.. 
..// your code 
     yourSQLiteDatabaseObject.close();
}

或

如果您的 yourSQLiteDatabaseObject 实例是公开的，那么您可以在循环之前执行此操作

 List<DatabaseSource> tasks = db.getListSched();
 db.yourSQLiteDatabaseObject.close();
        for (DatabaseSource task : tasks) {

注意:yourSQLiteDatabaseObject 将是 DatabaseSched 类中 SQLiteDatabase 的对象，如果链不在 中，则需要查找链code>DatabaseSched类；