28.18 A Pinch Gesture Example Project

Select the Start a new Android Studio project quick start option from the welcome screen and, within the resulting new project dialog, choose the Empty Activity template before clicking on the Next button.

Enter PinchExample into the Name field and specify com.ebookfrenzy.pinchexample as the package name. Before clicking on the Finish button, change the Minimum API level setting to API 26: Android 8.0 (Oreo) and the Language menu to Java.

Within the activity_main.xml file, select the default TextView object and use the Attributes tool window to set the ID to myTextView.

Locate and load the MainActivity.java file into the Android Studio editor and modify the file as follows:

package com.ebookfrenzy.pinchexample;

 

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.ScaleGestureDetector;

import android.view.ScaleGestureDetector.SimpleOnScaleGestureListener...