Android : Android Unfortunately app has stopped? [duplicate]

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• java.lang.IllegalStateException : Could not find a method onClick handler with id_button 3 answers

I have to make an app where the user inputs and then the AI responds but when I input some text and press send it gives me the message "Unfortunately, app has stopped".

Here is my code:

Here is the code for sending:

<Button
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/Button"
        android:id="@+id/Send_btn"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:onClick="Zdenka"   />...

Here is the start of the .java file:

    EditText Text, OdgBox;
    String odg;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        EditText Text = (EditText) findViewById(R.id.Txt); //User input
        Button Btn = (Button) findViewById(R.id.Send_btn); //Send button
        TextView Output = (TextView) findViewById(R.id.TextView); //AI output

    }...

And the last part of the java file:

...
public void Zdenka (TextView Output, EditText Text, String odg) {

    String Text1 = Text.toString().toLowerCase();


    if (Text1 == "živjo") {

        odg = "Živjo";

    }
    else if (Text1 == "zivjo") {
        odg = "oj";
    }
    else{ odg = "Ne razumem."; }



    Output.setText(odg);

Thanks for the help!