Android App Development | Lecture#24 | Hive Learners

Hello dear community members, Today is our 24th lecture on Android App Development. Due to the EID Season, there is a delay for this lecture. I am sorry for that and also wish you all the EID MUBARAK. I hope you all are enjoying a good time with your friends and family members. Today we will set some checks in our code and save the data of a user in the internal storage for the signing and signup. So let's jump into it.

GitHub Link

Use this GitHub project to clone into your directory. It will constantly get updated in the following lecture so you will never miss the latest code. Happy Coding!.

What Should I Learn

• How to set checks
• Save data in SharedPreferences

Assignment

• Create Check and save data

Procedure

First, we set some checks in the signup java code. Here are the checks for the name, email, password, and a check to compare the text in the password field with the text in the confirm password field. If any check failed then it will show an error in the target field. And the return stop the code to execute further. I use a built-in function TextUtils to implement these checks.

 if (TextUtils.isEmpty(name_et.getText())) {
                    name_et.setError("Invalid Name");
                    return;
                }
if (TextUtils.isEmpty(email_et.getText())) {
                    email_et.setError("Invalid Email");
                    return;
                }
if (TextUtils.isEmpty(pass_et.getText())) {
                    pass_et.setError("Invalid Password");
                    return;
                }
if (!(pass_et.getText().toString().equals(confirm_pass_et.getText().toString()))) {
                    Toast.makeText(MainActivity.this, "Password not matching", Toast.LENGTH_SHORT).show();
                    return;
                }

Now we create a function create_user with three parameters name, email, and password. Also, declare SharedPreferece. It will be used to save data in internal storage. It is not safe for security reasons. But will only learn it to use for different purposes rather than signing signup.

    private SharedPreferences sharedPreferences;

We also need to initialize the sharedPreferences.

sharedPreferences = getSharedPreferences("sharedPreferences", Context.MODE_PRIVATE);

Now we will implement the logic in the create_user function to store the data.

    public void create_user(String name, String email, String password) {
        sharedPreferences.edit().putString(email, password).apply();
        sharedPreferences.edit().putString(email + "_name", name).apply();
        Toast.makeText(this, "Account created successfully", Toast.LENGTH_SHORT).show();
        startActivity(new Intent(MainActivity.this, SignIn_Activity.class));
        finish();
    }

Now we need to call this function in the sign_up button click after the checks. This will create a new user and the data will save in internal private storage.