Please change the button’s below statement which needs to indicate correct method when clicking actions made.

Please change in XML file of button from,

android:onClick="click"

to,

android:onClick="onClick"

Otherwise, please change method name in Java file as "click()"

I am new in android learning Using this My app name is Threads.In Xml there is one Textview and button. When I click on button there will app shows “Threads has stopped” .

In this app I’m learning about how to us threads while developing app.

    package com.codewithjarvis.threads;

    import androidx.appcompat.app.AppCompatActivity;

    import android.os.Bundle;
    import android.view.View;
    import android.widget.TextView;
    import android.widget.Button;



    public class MainActivity extends AppCompatActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }

        public void onClick(View view)
        {
            Button Vbutton =(Button)findViewById(R.id.Vbutton);
            long Ltime = System.currentTimeMillis() + 5*1000;
            while (System.currentTimeMillis()< Ltime)
            {
                synchronized (this)
                {
                    try{
                        wait(Ltime - System.currentTimeMillis());
                    }catch (Exception e){}
                }
            }
            TextView Vtext = (TextView)findViewById(R.id.Vtext);
            Vtext.setText("hello frands this is surbhi");
        }
    }

    <?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.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=".MainActivity">

        <TextView
            android_id="@+id/Vtext"
            android_layout_width="wrap_content"
            android_layout_height="wrap_content"
            android_layout_marginTop="120dp"
            android_text="TextView"
            android_textSize="30sp"
            app_layout_constraintEnd_toEndOf="parent"
            app_layout_constraintStart_toStartOf="parent"
            app_layout_constraintTop_toTopOf="parent" />

        <Button
            android_id="@+id/Vbutton"
            android_layout_width="wrap_content"
            android_layout_height="wrap_content"
            android_layout_marginTop="296dp"
            android_onClick="click"
            android_text="Button"
            app_layout_constraintEnd_toEndOf="parent"
            app_layout_constraintHorizontal_bias="0.498"
            app_layout_constraintStart_toStartOf="parent"
            app_layout_constraintTop_toBottomOf="@+id/Vtext" />
    </androidx.constraintlayout.widget.ConstraintLayout>

why my app showing stopped in android phone? is there any bug or any error in my code
when I’m running this code it shows
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