Question

im new in developing Android Apps.
I know how to set the starting Activity with the AndroidManifest.xml, but i need a way to check something first before i choose the starting Activity.

My Problem:
I created a loginActivity and a mainActivity.
I want to do the following: If i log me in, i’ll set a flag to 1 and at the next app start, i want show directly the mainActivity and not the login.

Is there any way to do that? I thought about creating a splashscreen where i can check if im logged in before showing the first Activity.

Thanks, Philip

Updated Code – working:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // get preferences
    SharedPreferences userDetails = getApplicationContext().getSharedPreferences("userdetails", 0);
    String savedEmail = userDetails.getString("email", "");
    String savedPassword = userDetails.getString("password", "");
    Boolean savedRemember = userDetails.getBoolean("remember", false);
    Boolean savedLogged = userDetails.getBoolean("logged", false);

    // check if already logged in
    if(savedLogged) {
        // start the overview
        Intent intent = new Intent(this, ActivityOverview.class);
        startActivity(intent);
        finish();
    }
    else {
        // initialize the form layout
        setContentView(R.layout.activity_login);

        // get views
        this.email = (EditText)findViewById(R.id.editTextEmail);
        this.password = (EditText)findViewById(R.id.editTextPassword);
        this.remember = (CheckBox)findViewById(R.id.checkBoxRemember);

        // set values to views
        this.email.setText(savedEmail);
        this.password.setText(savedPassword);
        this.remember.setChecked(savedRemember);
    }
}

Answer 1

I have something similar in one of my apps. I let the user chose weather it should auto-login or not. This is saved in the SharedPreferences.

When the app starts and in the mainpage, you should check – BEFORE the setContentView(R.layout.activity_login); and set finish(); after startActivity();

if(savedLogged) {

    Intent intent = new Intent(this, ActivityOverview.class);
    startActivity(intent);
    finish();
}
setContentView(R.layout.activity_login);