android - android database.CursorIndexOutOfBoundsException

在我的应用程序中，我收到此错误，然后尝试解决该错误。但是我做不到。

Cursor c = G.db.getReceivedFromDatabaseByCount ( username, received_count );
if (c != null && c.moveToLast () && c.getCount () != 0) {
        for (int i = cursor_count; i > 0; i--) {
          ...
          c.moveToPrevious ();
        }
    }
c.close ();

在Google和此网站中进行任何搜索并将c.moveToLast ()添加到if后，必须解决此问题。

完整的LogCat结果：

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sample/com.sample.Service.ServiceDialog}: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 4
    ...
Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 4
    at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424)
    at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
    at com.sample.Service.ServiceDialog.updateAndIntertDialog(ServiceDialog.java:216)
    at com.sample.Service.ServiceDialog.onCreate(ServiceDialog.java:125)
    at android.app.Activity.performCreate(Activity.java:5122)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
    ... 11 more
android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 4
    at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424)
    at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
    at com.sample.Service.ServiceDialog.updateAndIntertDialog(ServiceDialog.java:216)
    at com.sample.Service.ServiceDialog.onCreate(ServiceDialog.java:125)

最佳答案

您不应将int i = cursor_count设置为等同于游标的长度，该长度与上一个索引值不同。

应该是这样的：

for (int i = (cursor_count - 1); i >= 0; i--)

关于android - android database.CursorIndexOutOfBoundsException，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/27254607/