sqlite数据库hardcode /data/ db_path android

Question

无法检索数据库，并显示以下lint警告：

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

我已经尝试搜索相关的错误，但没有任何帮助。下面是代码

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);
}

我真的不明白这是怎么回事。它以前是有效的，但我想这是因为我已经从API 8迁移到了API 14。我猜这个更高的API有另一个编码规则。是真地吗？

Answer 1

要获取数据库的路径，请使用use getDatabasePath()。

Answer 2

您可以使用以下两种方法中的任何一种来获取数据库的路径：

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

或者使用这个

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