SQLite數據庫硬編碼/數據/ DB_PATH的Android

Question

無法檢索數據庫，並顯示出皮棉警告說：

Do not hardcode "/data/"; use Context.getFilesDir().getPath() instead 

是否嘗試過搜索相關錯誤，但沒有什麼幫助。 下面的代碼

private static String DB_PATH = "/data/data/mlearning.fundprog/databases/"; 
private static String DB_NAME = "questionsDb"; 
private SQLiteDatabase myDataBase; 
private final Context myContext; 

public DBHelper(Context context) { 
    super(context, DB_NAME, null, 1); 
    this.myContext = context; 
    DB_PATH = context.getFilesDir().getPath() + context.getPackageName() + DB_NAME; 
} 

private boolean checkDataBase(){ 
    SQLiteDatabase checkDB = null; 
    try{ 
     String myPath = DB_PATH + DB_NAME; 
     checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); 
    }catch(SQLiteException e){ 

    } 
    if(checkDB != null){ 
     checkDB.close(); 
    } 

    return checkDB != null ? true : false; 
} 

private void copyDataBase() throws IOException{ 
    InputStream myInput = myContext.getAssets().open(DB_NAME); 
    String outFileName = DB_PATH + DB_NAME; 
    OutputStream myOutput = new FileOutputStream(outFileName); 

    byte[] buffer = new byte[1024]; 
    int length; 
    while ((length = myInput.read(buffer))>0){ 
     myOutput.write(buffer, 0, length); 
    } 

    myOutput.flush(); 
    myOutput.close(); 
    myInput.close(); 
} 

public void openDataBase() throws SQLException{ 
    String myPath = DB_PATH + DB_NAME; 
    myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); 
} 

我真的不明白什麼是錯。它以前工作，但我認爲這是因爲我已經從API 8移到API 14。我想這個更高的API有編碼的另一個規則。是這樣嗎？

Answer 1

獲取數據庫的路徑，use getDatabasePath()。

Answer 2

你可以使用任何的以下2種方法讓你的數據庫的路徑：

• DB_PATH = "/data/data/" + context.getApplicationContext().getPackageName() + "/databases";

或使用該

• DB_PATH = context.getDatabasePath(DB_NAME).getParent();