Question

希望没有很多代码，所以我为此道歉。我会尽量保持它尽可能轻，这意味着我不提供一切（尽管如果需要，我会）。但我正在调试它，并将问题缩小到我提供的课程中的意图问题，但我可能是错的。我的错误如下：

6-09 00:47:15.992: E/AndroidRuntime(728): java.lang.RuntimeException: Failure delivering
result ResultInfo{who=null, request=2, result=-1, data=Intent { 
cmp=com.zeroe/.ListManagersActivity (has extras) }} to activity 
{com.zeroe/com.zeroe.MainDisplayActivity}: java.lang.ArrayIndexOutOfBoundsException:
length=2; index=2
java.lang.ArrayIndexOutOfBoundsException: length=2; index=2
06-09 03:27:42.732: E/AndroidRuntime(5076): at
com.zeroe.SmartCalDatabaseHelper.saveManagedEvent(SmartCalDatabaseHelper.java:106)
06-09 03:27:42.732: E/AndroidRuntime(5076): at 
com.zeroe.TimeManager.insertManagedEvents(TimeManager.java:100)

所以我的错误在onActivityResult（）方法中，我假设问题在于它无法访问我放入它的内容。我在这里完全猜测，但它与如何从类的范围创建意图有关，并且当调用该方法时，它无法找到它，就像意图不是针对该上下文我猜。我一直在经历它，现在我什么都没有。已经好几个小时了，所以任何提示都会非常感激！

编辑：我道歉，如果不是很明显，但这个类是通过我的主要活动的一个意图调用的，然后我在setOnItmClickListener方法中调用另一个意图。只是澄清一下。如果需要，请让我发布任何其他内容。我只是不想用代码过度膨胀。

最新编辑：好的，所以我的头因为看了这么长时间而杀了我，但我确实指出了问题的确切位置。它将最后一个“事件”插入DatabaseHelper类的数据库后立即挂起。我相信我已经评论了如果你能找到它的地方，但问题是，我不知道它为什么会失败。我查看了我的数据库，所有内容都正确插入!!但我相信，一旦它完成，它又回到onActivityResult，它就会失败。多数民众赞成在那里我无法回答这个问题。所以看起来一切都正确完成，但它是最后一件事，这是导致问题的意图结束？我是否在处理意图onActivityResult方法结束时遗漏了一些东西？

DatabaseHelper.java

/*Omitting imports, but they are there*/

public class DatabaseHelper {

private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "smartcal.db";

private OpenHelper openHelper;
private SQLiteDatabase database;

public DatabaseHelper(Context context) {
    openHelper = new OpenHelper(context);
    database = openHelper.getWritableDatabase();

}

...

public Cursor getEventId(String eventName, String timeStamp) {

    return database.rawQuery("SELECT * FROM events WHERE time_stamp='"+timeStamp+"' AND event='"+eventName+"'", null);
}


public Cursor getAgendaToEdit(long id) {
    return database.rawQuery("SELECT * FROM events_info WHERE _id='"+id+"'", null);
}//end of getAgendaToEdit method


public Cursor getAgendaInfo(String date) {

    String query = "SELECT _id, event_name, start_date, start_time, end_date, end_time, " +
    "location FROM events_info WHERE date('"+date+"') >= start_date and date('"+date+"') <= end_date"; //add WHERE clause to filter for current day
    return database.rawQuery( query, null);
}//end getAgendaInfo



public Cursor getNumOfSteps(String id) {
    return database.rawQuery("SELECT _id, steps FROM managers WHERE _id='"+id+"'", null);
}

public Cursor getSteps(String id) {
    return database.rawQuery("SELECT _id, name FROM manager_steps WHERE boss='"+id+"' ORDER BY step_num", null);
}


public void saveManagedEvent(String eventId, String singleEventName, String location, String startDate, String startTime, String endDate, String endTime) {
    String[] tempDate = startDate.split("-");
    startDate = "";
    startDate = tempDate[2] + "-" + tempDate[0] + "-" + tempDate[1];
    tempDate = endDate.split("-");
    endDate = "";
    endDate = tempDate[2] + "-" + tempDate[0] + "-" + tempDate[1];

    ContentValues toSecondDatabase = new ContentValues();
    toSecondDatabase.put("event_id", eventId);
    toSecondDatabase.put("event_name", singleEventName);
    toSecondDatabase.put("start_date", startDate);
    toSecondDatabase.put("start_time", startTime);
    toSecondDatabase.put("end_date", endDate);
    toSecondDatabase.put("end_time", endTime);
    toSecondDatabase.put("location", location);
    database.insert("events_info", null, toSecondDatabase);
    /*HANGS HERE FOR SOME REASON AND GIVES ME THE ABOVE ERROR*/
}

public String saveSingleEvent(String event) {
    String timeStamp = getTimeStamp();

    ContentValues toFirstDatabase = new ContentValues();
    toFirstDatabase.put("event", event);
    toFirstDatabase.put("time_stamp", timeStamp);
    database.insert("events", null, toFirstDatabase);

    Cursor eventCursor = getEventId(event, timeStamp);
    eventCursor.moveToFirst();
    int eventId = eventCursor.getInt(0);
    eventCursor.close();
    return String.valueOf(eventId);
}


public String getTimeStamp() {
    SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy h:mm:ss a");
    return sdf.format(new Date());
}
private static String pad(int c) {
    if (c >= 10)
        return String.valueOf(c);
    else
        return "0" + String.valueOf(c);
}



/*SQLITEOPENHLPER INNER CLASS HERE*/


}//end of SmartCalDatabaseHelper Class

TimeManager.java

...
public void createStepsArray() {

    Cursor stepsInfo = databaseHelper.getSteps(managerId);
    for(int i=0; i < numOfSteps; i++ ) {
        stepsInfo.moveToPosition(i);
        stepHolder[i] = stepsInfo.getString(1);
    }
    stepsInfo.close();
}//end of createStepsArray method

public void insertManagedEvents() {
    Calendar now = Calendar.getInstance();
    String id = databaseHelper.saveSingleEvent(eventName);

    for(int i=0; i < numOfSteps; i++) {
        if(i == 0) now.add(Calendar.DAY_OF_MONTH, addBetweenEvents - 1); 
        else 
        now.add(Calendar.DAY_OF_MONTH, addBetweenEvents);

        if(i == numOfSteps-1) {
            databaseHelper.saveManagedEvent(id, stepHolder[i], location, 
                    new StringBuilder().append(eYear).append("-").append(pad(eMonth)).append(pad(eDay)).toString(), 
                    "00:00", 
                    new StringBuilder().append(eYear).append("-").append(pad(eMonth)).append(pad(eDay)).toString(), 
                    "00:00");
        } else { 
            databaseHelper.saveManagedEvent(id, stepHolder[i], location, 
                    new StringBuilder().append(now.get(Calendar.YEAR)).append("-").append(pad(now.get(Calendar.MONTH)+1)).append("-").append(pad(now.get(Calendar.DAY_OF_MONTH))).toString(), 
                    "00:00", 
                    new StringBuilder().append(now.get(Calendar.YEAR)).append("-").append(pad(now.get(Calendar.MONTH)+1)).append("-").append(pad(now.get(Calendar.DAY_OF_MONTH))).toString(), 
                    "00:00");
        }
    }

}//end of insertManagedEvents method

MainActivity.java

...
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == EVENT_ENTRY_REQUEST_CODE) {
        if(resultCode == RESULT_OK) {
            //send the database the info sent back from add event activity
            databaseHelper.saveSimpleEvent(data.getStringExtra("event"),data.getStringExtra("location"), 
                    data.getStringExtra("start_date"), data.getStringExtra("start_time"), 
                    data.getStringExtra("end_date"), data.getStringExtra("end_time"));

                agendaAdapter.changeCursor(databaseHelper.getAgendaInfo(getChosenDate()));

        }
    }
    if(requestCode == MANAGED_EVENT_LIST_REQUEST_CODE) {
        if(resultCode == RESULT_OK) {
            //Do stuff when managed list is working alright, and 
            //after user enters necessary info, in order to create the events into the database
            TimeManager timeManager = new TimeManager(databaseHelper, data.getStringExtra("manager_id"), 
                    data.getStringExtra("event_name"), data.getStringExtra("events_subject"), data.getStringExtra("location"), data.getStringExtra("end_time"));
            if(timeManager.checkValidManager()== false) {
                //tell user it failed due to the days not being correct in order to manage time
            } else {
                timeManager.createStepsArray();
                timeManager.insertManagedEvents();
                /*OR HANGS HERE MORE LIKELY SINCE THIS IS WHERE THE ERROR SAYS*/
            }
        }
    }
}//end of onActivityForResult Method
...

Answer 1

从您的代码中我了解到您正在调用AddManagedEventActivity并发送带有标记String.valueOf(id)的额外manager_id。然后在你的onActivityResult中想要从AddManagedEventActivity获取数据？我认为您应该使用intent.getExtra(..)从AddManagedEventActivity获取数据这个答案是基于您的代码的，因为您没有给出您的目的的简短说明：P，抱歉我无法评论，我没有代表：/

Answer 2

尝试将循环限制为数组的大小：

Cursor stepsInfo = databaseHelper.getSteps(managerId);
for(int i=0; i < stepHolder.length; i++ ) { //Use stepHolder.length instead.
    stepsInfo.moveToPosition(i);
    stepHolder[i] = stepsInfo.getString(1);
}
stepsInfo.close();

与for循环相同

for(int i=0; i < stepHolder.length; i++) { //stepHolder.length here too

请注意，错误消息显示您有一个indexOutOfBounds，即您进入数组太深。将循环限制为数组大小或修复获得numOfSteps的方式。

如何使用setOnItemClickListener中的Intent调用及其重写的方法OnItemClick（）正确设置startActivityForResult（）？

2 个答案: