I'm testing out some stuff on android as a beginner and was trying to grab value entered in a EditText when a button was clicked , then compare it to a string value that I defined inside the class, then use if (EditText == stringDefined) else () , but my code always jumps on the else part even if the correct text is entered, any help is appreciated. Here is the code :
Button mButton;
EditText mEdit1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
final String user = "admin";
mButton = (Button)findViewById(R.id.BTN_login);
mEdit1 = (EditText)findViewById(R.id.editText1);
mButton.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
String userEntered = mEdit1.getText().toString().trim();
Intent intent = new Intent(Login.this, Success.class);
if(userEntered == user){
startActivity(intent);
}
else{
AlertDialog.Builder errAlert = new AlertDialog.Builder(Login.this);
errAlert.setTitle("Wrong Credentials");
errAlert.setMessage("Wrong username");
errAlert.setCancelable(true);
errAlert.show();
}
}
});
}
Use equals method :
if(userEntered.equals(user)){
startActivity(intent);
}
==
用于比较原始类型,而java.lang.String
类的equals()
方法比较内容。
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