sample gist UI automator.

gistfile1.txt

package com.mobilesla.testapp;

import android.content.Context;

import androidx.test.platform.app.InstrumentationRegistry;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.uiautomator.UiDevice;
import androidx.test.uiautomator.UiObject;
import androidx.test.uiautomator.UiObjectNotFoundException;
import androidx.test.uiautomator.UiSelector;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

import java.io.IOException;

/**
 * Instrumented test, which will execute on an Android device.
 *
 * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
 */
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
    protected UiDevice mDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());

    @Before
    public void setup() throws IOException {
        mDevice.executeShellCommand("am force-stop com.amazonaws.devicefarm.android.referenceapp");
    }

    @Test
    public void useAppContext() throws IOException, UiObjectNotFoundException, InterruptedException {
        mDevice.executeShellCommand("am start -n com.amazonaws.devicefarm.android.referenceapp/com.amazonaws.devicefarm.android.referenceapp.Activities.MainActivity");
        Thread.sleep(5000);
        mDevice.findObject(new UiSelector().className("android.widget.ImageButton")).click();
        mDevice.findObject(new UiSelector().text("Web")).click();
        mDevice.findObject(new UiSelector().text("http://www.amazon.com")).setText("https://www.google.com/");
        mDevice.pressEnter();

        UiObject settingsValidation = mDevice.findObject(new UiSelector().text("Sign in"));
        Assert.assertTrue(settingsValidation.waitForExists(5000));
    }
}