如何将 SQLcipher 添加到 android 项目？

Question

我正在尝试使用 SQLCipher 为我的项目加密我的数据库。我添加了使用 sqlCipher 所需的所有资产和库，但问题是我有一个专门用于数据库操作的整个类，所以我对我的位置有点困惑应该添加提到的所需代码here。我确实尝试在我的数据库open() 方法中初始化上述库，但这只是给了我一个没有这样的表异常。

在进行任何修改之前，这是我的代码。任何帮助都将不胜感激

public class DataBaseHandler {
public static final String KEY_ID = "id";
public static final String KEY_XCOD = "xcod";
public static final String KEY_YCOD = "ycod";
public static final String KEY_IMG = "img";
public static final String KEY_PATTERN = "pattern";
public static final String KEY_PACKAGENAME = "packagename";
private static final String DATABASE_NAME = "P3UserDb";
private static final String DATABASE_USERTABLE = "LoginDetailsTable";
private static final String DATABASE_PATTERNTABLE = "PatternDetailsTable";
private static final String DATABASE_LOCKEDAPPSTABLE = "LockedAppsTable";
private static final int DATABASE_VERSION = 1;

private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;

public static class DbHelper extends SQLiteOpenHelper {

    public DbHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL("CREATE TABLE " + DATABASE_USERTABLE + " (" + KEY_ID
                + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_XCOD
                + " INTEGER NOT NULL, " + KEY_YCOD + " INTEGER NOT NULL, "
                + KEY_IMG + " TEXT NOT NULL);");
        db.execSQL("CREATE TABLE " + DATABASE_PATTERNTABLE + " ("
                + KEY_PATTERN + " STRING NOT NULL);");
        db.execSQL("CREATE TABLE " + DATABASE_LOCKEDAPPSTABLE + " ("
                + KEY_PACKAGENAME + " STRING);");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        db.execSQL("DROP TABLE IF EXISTS " + DATABASE_USERTABLE);
        db.execSQL("DROP TABLE IF EXISTS " + DATABASE_PATTERNTABLE);
        db.execSQL("DROP TABLE IF EXISTS " + DATABASE_LOCKEDAPPSTABLE);
        onCreate(db);
    }
}

public DataBaseHandler(Context c) {
    ourContext = c;
}

public DataBaseHandler open() throws SQLException {
    ourHelper = new DbHelper(ourContext);
    ourDatabase = ourHelper.getWritableDatabase();
    return this;
}

public void close() {
    ourHelper.close();
}
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Other Database operations
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}

Answer 1

在初始化 SQLiteOpenHelper 子类之前，您需要调用 SQLiteDatabase.loadLibs(…); 并传递一个上下文。这将正确地允许加载本机库。