Handling Thread in Android

Dear All

As we know how thread plays an important role to perform multiple task simultaneously in Java.
In this example i am handling the Main Thread and performing an operation to wait for a while.
Just read the example.
A. Output will be
1. Before Button Pressed

2. After 5 sec of Button Pressed

B. xml file is as   activity_main.xml

<TextView    android:id="@+id/myTextView"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:layout_centerHorizontal="true"

    android:layout_centerVertical="true"

    android:text="Hello_world" />

<Button        android:id="@+id/button1"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:layout_below="@+id/myTextView"

    android:layout_centerHorizontal="true"

    android:layout_marginTop="48dp"

    android:onClick="buttonPressed"

    android:text="Click Me" />

C. Java Code  MainActivity.java

package com.example.ravigodara.singlethread;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    TextView textView;
    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView =(TextView)findViewById(R.id.myTextView);
    }
    public void buttonPressed(View view)
    {
        long endTime = System.currentTimeMillis() + 5*1000;
        while (System.currentTimeMillis() < endTime) {
            synchronized (this) {
                try {
                    wait(endTime - System.currentTimeMillis());
                }
                catch (Exception e) {
                }
            }
        }

        textView.setText("Button Pressed");

    }

}