Practical 9
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Bluetooth"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_gravity="center"
android:paddingTop="100dp"
android:textSize="25dp"
app:layout_constraintVertical_bias="0.146" />
<ToggleButton
android:id="@+id/tb1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Bluetooth"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:layout_editor_absoluteY="209dp" />
<TextView
android:id="@+id/tvi1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="25dp"
android:text="Bluetooth" />
</LinearLayout>
JAVA
package com.example.pr7;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.ToggleButton;
public class MainActivity extends AppCompatActivity {
ToggleButton t1;
TextView tv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
t1=(ToggleButton) findViewById(R.id.tb1);
tv1=(TextView) findViewById(R.id.tvi1);
t1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
tv1.setText("Bluetooth "+t1.getText().toString());
});
