基于电子邮件从数据库中检索用户数据

Question

我在数据库中有不同用户的数据，我想检索当前登录应用程序的用户的数据，我能够检索数据，但我不知道如何display/show 它在主要 Activity.

这是我的 getUserData 方法

DBHandler

 public ArrayList<User> getUserData(String email){
 Log.e("email", "" + email);
 ArrayList<User> arrayList = new ArrayList<>();
 SQLiteDatabase db = this.getWritableDatabase();
 Cursor cursor;
    String query =  " select * from " +TABLE_NAME+ " where "+COLUMN_EMAIL+ "=?";
  String[] select = new String[]{email};
    cursor = db.rawQuery(query,select);
 Log.e("Query", "" + query);

    if (cursor.moveToFirst()) {
        do {
            String FirstName = cursor.getString(0);
            String LastName = cursor.getString(1);
            String Email = cursor.getString(2);
            byte[] image = cursor.getBlob(5);
            String gender = cursor.getString(6);
            String status = cursor.getString(8);

            User user = new User(FirstName, LastName, Email, image, gender, status);
            arrayList.add(user);
        }

        while (cursor.moveToNext());
    }
    cursor.close();

    return arrayList;}

现在我想在主屏幕上显示它Activity我该怎么做？

Answer 1

    TextView FirstName = findViewById(R.id.FirstName);
    TextView LastName = findViewById(R.id.LastName);

    ArrayList<User>  userArrayList = new ArrayList<User>(getUserData("user@gmail.com"));  // User data stored in userArrayList now you can use userArrayList for showing data
    
    FirstName.setText(userArrayList.get(0).getFirstName());  // get(0) Gives you first name from first position
    LastName.setText(userArrayList.get(0).getLastName());

基于电子邮件从数据库中检索用户数据

Retrieving User's data from database on the basis of email

android

android-sqlite