For a little android project I'm making a loginscreen. I have variables, but they stay empty once I fill them in and press the button.
these are my variables:
private EditText email;
private EditText wachtwoord;
private Button loginButton;
here I fill them:
email = (EditText)findViewById(R.id.emailInput);
wachtwoord = (EditText)findViewById(R.id.wachtwoordInput);
loginButton = (Button)findViewById(R.id.loginButton);
}
}
and my method which always executes the catch code
public void login(View view)
{
try {
if(email.getText().toString() == "jolt_koens@hotmail.com" && wachtwoord.getText().toString() == "admin")
{
Toast.makeText(getApplicationContext(), "gelukt", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplicationContext(), "mislukt", Toast.LENGTH_SHORT).show();
loginButton.setEnabled(false);
}
Compare strings using either of these methods
method 1:
if(((email.getText().toString().compareTo("jolt_koens@hotmail.com")==0) && (wachtwoord.getText().toString().compareTo("admin")==0))
{
do something
}
method 2:
if(((email.getText().toString().equals("jolt_koens@hotmail.com") )&& (wachtwoord.getText().toString().equals("admin")))
{
do something
}
public void login(View view)
{
try {
if(email.getText().toString() .equals ("jolt_koens@hotmail.com") && wachtwoord.getText().toString().equals( "admin"))
{
Toast.makeText(getApplicationContext(), "gelukt", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplicationContext(), "mislukt", Toast.LENGTH_SHORT).show();
loginButton.setEnabled(false);
}
Try the above code. Use .equals() instead of == To understand the difference between the two read this .
Change this line:
if(email.getText().toString() == "jolt_koens@hotmail.com" && wachtwoord.getText().toString() == "admin")
to this:
if(email.getText().toString().equals("jolt_koens@hotmail.com") && wachtwoord.getText().toString().equals("admin"))
if(email.getText().toString().equalsIgnoreCase("jolt_koens@hotmail.com") && wachtwoord.getText().toString().equalsIgnoreCase ("admin"))
{
Toast.makeText(getApplicationContext(), "gelukt", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplicationContext(), "mislukt", Toast.LENGTH_SHORT).show();
loginButton.setEnabled(false);
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.