I have a button on Android where when clicking, will be directed to another screen. The structure of the page looks like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#B4C4D9"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/txtView3"
android:layout_width="120dp"
android:layout_height="80dp"
android:layout_alignLeft="@+id/txtView1"
android:layout_alignStart="@+id/txtView1"
android:layout_below="@+id/txtView1"
android:layout_marginTop="56dp"
android:background="#5181a9"
android:textColor="#B4C4D9"
android:onClick="Cadastrar"
android:drawableTop="@mipmap/ic_monitoria"
android:text="@string/monitoria"
android:textStyle="bold" />
</RelativeLayout>
</LinearLayout>
The Register file has already been created as shown below:
YourXMLlookslikethis:
<?xmlversion="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="br.com.projeto.acessosistema.Cadastrar">
</android.support.constraint.ConstraintLayout>
And Java:
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class Cadastrar extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cadastrar);
}
}
But when I click the button to go to the registration page, it says that the app stopped and when debugging, it returns the following error:
FATAL EXCEPTION: main
Process: br.com.projeto.acessosistema, PID: 30190
java.lang.IllegalStateException: Could not find method Cadastrar(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatButton with id 'txtView3'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:327)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Does anyone know why this happens? I already created another button directed to another file and it works normally, the problem only happens with the Cadastre.