Question

我得到了这个例外

06-26 15：49：43.390：E / AndroidRuntime（1337）：android.database.CursorIndexOutOfBoundsException：索引-1请求，大小为1

这个游标检索2列，虽然我使用快速搜索框相同的数据库，它显示3列数据，问题是这个游标检索两列，虽然提供者下面从3列检索数据

此代码片段，我从光标

获取数据

 @Override
 public Loader<Cursor> onCreateLoader(int arg0, Bundle data) {
 Uri uri = SuggestProvider.CONTENT_URI;
 return new CursorLoader(getBaseContext(), uri,
        null, null , new String[]{data.getString("query")}, null);
 }
 @Override
 public void onLoadFinished(Loader<Cursor> arg0, Cursor c) {
 mCursorAdapter.swapCursor(c);
 int Id = c.getColumnIndex(database.FIELD_ID);
 int Title = c.getColumnIndex(database.SONG);
 int Artist = c.getColumnIndex(database.ARTIST);

 do {
    long thisId = c.getLong(Id);
    String thisTitle = c.getString(Title);
    String thisArtist = c.getString(Artist);
    songList.add(new Song(thisId, thisTitle, thisArtist));
  }
    while (c.moveToNext());
 }

在此代码段提供程序中获取uri

 @Override
   public Cursor query(Uri uri, String[] projection, String selection,
                String[] selectionArgs, String sortOrder) {
    Cursor c = null;
    switch (sURIMatcher.match(uri)) {
    case SEARCH_RECORDS:
        c = table.getSongs(selectionArgs);
        break;
    case GET_RECORD:
        c = table.getSongs(selectionArgs);
        break;
    case SEARCH_SUGGEST:
        String id = uri.getLastPathSegment();
        c = table.getSong(id);
    }
   return c;
  }

函数getSongs数据库表，我得到数据

public Cursor getSongs(String[] selectionArgs){

String selection = SONG + " like ? ";

if(selectionArgs!=null){
    selectionArgs[0] = "%"+selectionArgs[0] + "%";
}

SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
queryBuilder.setProjectionMap(mAliasMap);

queryBuilder.setTables(TABLE_NAME);

Cursor c = queryBuilder.query(helper.getReadableDatabase(),
        new String[] { "_ID",
                SearchManager.SUGGEST_COLUMN_TEXT_1 ,
                SearchManager.SUGGEST_COLUMN_TEXT_2 ,
                SearchManager.SUGGEST_COLUMN_INTENT_DATA_ID
        } ,
        selection,
        selectionArgs,
        null,
        null,
        SONG + " asc ","1"
);
return c;

}

Answer 1

为什么CursorLoader没有选择的selectionArgs？你的意思是“查询”订购吗？

值得一试，有时候，在使用DB时，切换掉掉并重新创建表的数据库版本可以帮助..

使用Loaders的CursorIndexOutOfBoundsException

1 个答案: