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SharedPreferences

</ProgAli> answered on January 24, 2022 Popularity 10/10 Helpfulness 3/10

answer SharedPreferences

SharedPreferences

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/*============StartActivity.java============*/

public class StartActivity extends AppCompatActivity {

private static final String PREF_LOGIN = "LOGIN_PREF";
private static final String KEY_CREDENTIALS = "LOGIN_CREDENTIALS";


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    SharedPreferences preferences = getSharedPreferences(PREF_LOGIN, MODE_PRIVATE);

    Intent intent = null;
    if(preferences.contains(KEY_CREDENTIALS)){              //if user is currently logged in;
        intent = new Intent(this, MainActivity.class);
    }else {                                                 //if user is not yet logged in;
        intent = new Intent(this, LoginActivity.class);
    }
    startActivity(intent);
}

}

/*============LoginActivity.java============*/

public class LoginActivity extends AppCompatActivity {

public static final String PREF_LOGIN = "LOGIN_PREF";
public static final String KEY_CREDENTIALS = "LOGIN_CREDENTIALS";

private Button loginButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);

    //...

    loginButton.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            //call login api...


            //on your sucess callback; we save the credentials...
            /*
            SharedPreferences.Editor editor = getSharedPreferences(PREF_LOGIN, MODE_PRIVATE).edit();
            editor.putString(KEY_CREDENTIALS, "DUMMY CREDENTIALS");
            editor.commit();
            */

            //on your failure callback; we clear the credentials...

            /*
            SharedPreferences.Editor editor = getSharedPreferences(PREF_LOGIN, MODE_PRIVATE).edit();
            editor.clear();
            editor.commit();
            */
        }


    });
}

Popularity 10/10 Helpfulness 3/10 Language java

Source: Grepper

Tags: java sharedpreferences

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Contributed on Jan 24 2022

</ProgAli>

0 Answers Avg Quality 2/10

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