查詢MediaStore - SQLiteException

Question

我正在執行對mediastore的查詢，以努力返回特定atist的專輯數量。

查詢看起來是這樣的：

public String doQuery(String artistName) { 

     String[] proj = new String[] { MediaStore.Audio.Artists._ID, 
       MediaStore.Audio.Artists.NUMBER_OF_ALBUMS, 
       MediaStore.Audio.Artists.ARTIST }; 

     Uri baseUri = MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI; 

     selection = MediaStore.Audio.Artists.ARTIST + " = " + artistName; 
     Log.i(TAG, "Selection artistName = " + artistName); 

     Cursor mCursor = getContentResolver().query(baseUri, proj, selection, 
       null, null); 

     mCursor.moveToFirst(); 

     return 

     mCursor.getString(mCursor 
       .getColumnIndex(MediaStore.Audio.Artists.NUMBER_OF_ALBUMS)); 

    } 

的ARTISTNAME傳遞中，並且選擇應該向下縮小光標只有藝術家。我收到以下例外情況：

09-19 23:13:14.855: E/AndroidRuntime(17911): android.database.sqlite.SQLiteException: near "Stone": syntax error (code 1): , while compiling: SELECT _id, number_of_albums, artist FROM artist_info WHERE (artist = Nine Inch Nails) 

有人可以告訴我我做錯了什麼嗎？

Answer 1

執行以下操作：

selection = MediaStore.Audio.Artists.ARTIST + " =? "; 
String[] selectionArgs = new String[]{artistName}; 
Cursor mCursor = getContentResolver().query(baseUri, proj, selection, 
       selectionArgs, null); 

這樣即使artistName包含一個單引號，它將執行沒有錯誤。