CursorIndexOutOfBoundsException：请求索引 -1，大小为 163

Question

我正在开发一个应用程序，例如视频播放器。当执行特定方法时，我得到 CursorIndexOutOfBoundsException。我在这里发布那个方法。

代码：

public void getVideoBuckets() {
    Cursor cursor = getContentResolver().query(Media.EXTERNAL_CONTENT_URI, this.bucketProjection, null, null, "date_added");
    ArrayList<String> bucketNamesTEMP = new ArrayList<>(cursor.getCount());
    ArrayList<String> bucketImageTemp = new ArrayList<>(cursor.getCount());
    HashSet<String> albumSet = new HashSet<>();
    if (cursor.moveToLast()) {
        while (!Thread.interrupted()) {
            String album = cursor.getString(cursor.getColumnIndex(this.bucketProjection[0]));
            String image = cursor.getString(cursor.getColumnIndex(this.bucketProjection[1]));
         //Issue with above two lines.  
   if (image != null && new File(image).exists() && !albumSet.contains(album)) {
                bucketNamesTEMP.add(album);
                bucketImageTemp.add(image);
                albumSet.add(album);
            }
        }
        return;
    }
    cursor.close();
    if (bucketNamesTEMP == null) {
        this.bucketNamesList = new ArrayList();
    }
    this.bucketNamesList.clear();
    this.bucketImagePathList.clear();
    this.bucketNamesList.addAll(bucketNamesTEMP);
    this.bucketImagePathList.addAll(bucketImageTemp);
}

来自 logcat 的崩溃详细信息：

Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 163
    at android.database.AbstractCursor.checkPosition(AbstractCursor.java:466)
    at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
    at android.database.CursorWrapper.getString(CursorWrapper.java:137)
    at com.andromania.MyVideoInputGallery.BucketActivity.getVideoBuckets(BucketActivity.java:168)

Answer 1

我像下面这样修改方法的代码后解决了这个问题。

public void getVideoBuckets() {
    final Cursor query = this.getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, this.bucketProjection, (String)null, (String[])null, "date_added");
    final ArrayList list = new ArrayList<String>(query.getCount());
    final ArrayList list2 = new ArrayList<String>(query.getCount());
    final HashSet<String> set = new HashSet<String>();
    MyLabel: {
        if (!query.moveToLast()) {
            break MyLabel;
        }
        while (!Thread.interrupted()) {
            final String string = query.getString(query.getColumnIndex(this.bucketProjection[0]));
            final String string2 = query.getString(query.getColumnIndex(this.bucketProjection[1]));
            if (string2 != null && new File(string2).exists() && !set.contains(string)) {
                list.add(string);
                list2.add(string2);
                set.add(string);
            }
            if (!query.moveToPrevious()) {
                break MyLabel;
            }
        }
        return;
    }
    query.close();
    if (list == null) {
        this.bucketNamesList = new ArrayList();
    }
    this.bucketNamesList.clear();
    this.bucketImagePathList.clear();
    this.bucketNamesList.addAll(list);
    this.bucketImagePathList.addAll(list2);
}

感谢大家的帮助。

CursorIndexOutOfBoundsException：请求索引 -1，大小为 163

CursorIndexOutOfBoundsException: Index -1 requested, with a size of 163

java

android

android-cursor

android-database