Question

无法检索数据库，并显示一条lint警告：

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

尝试过搜索相关错误，但没有任何帮助。这是代码

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);
}

我真的不明白这有什么不对。之前它正在工作，但我正在思考它，因为我已经从API 8转移到API 14.我想这个更高的API有另一个编码规则。是这样吗？

Answer 1

获取数据库的路径use getDatabasePath()。

Answer 2

您可以使用以下任何一种方法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();

sqlite数据库硬编码/ data / db_path android

2 个答案: