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Android Assignment 02

Introduction to RecyclerView

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Please conduct the following tasks alone. For implementation details you can refer to the lecture slides or the Android developer website. Please do not hesitate to ask me or the tutor if you have any questions.

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Tasks

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Item Views

Use this android ids for each row:

Example Layout: center

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Row Data

Use this data to fill out your rows:

title year actor
Dr. No 1962 Sean Connery
From Russia with Love 1963 Sean Connery
Goldfinger 1964 Sean Connery
Thunderball 1965 Sean Connery
You Only Live Twice 1967 Sean Connery
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Espresso Test

package de.hdmstuttgart.movietracker;


import android.view.View;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import androidx.test.espresso.contrib.RecyclerViewActions;
import androidx.test.espresso.matcher.BoundedMatcher;
import androidx.test.ext.junit.rules.ActivityScenarioRule;
import androidx.test.filters.LargeTest;
import androidx.test.runner.AndroidJUnit4;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static androidx.test.espresso.Espresso.onView;
import static androidx.test.espresso.action.ViewActions.click;
import static androidx.test.espresso.assertion.ViewAssertions.matches;
import static androidx.test.espresso.core.internal.deps.guava.base.Preconditions.checkNotNull;
import static androidx.test.espresso.matcher.ViewMatchers.hasDescendant;
import static androidx.test.espresso.matcher.ViewMatchers.withId;
import static androidx.test.espresso.matcher.ViewMatchers.withText;

@LargeTest
@RunWith(AndroidJUnit4.class)
public class Assignment2Test {

    @Rule
    public ActivityScenarioRule<MainActivity> activityScenarioRule
            = new ActivityScenarioRule<>(MainActivity.class);

    @Test
    public void mainActivityTest() {

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(0, hasDescendant(withText("Dr. No")))));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(1, hasDescendant(withText("From Russia with Love")))));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(2, hasDescendant(withText("Goldfinger")))));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(3, hasDescendant(withText("Thunderball")))));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(4, hasDescendant(withText("You Only Live Twice")))));

        onView(withId(R.id.homeRecyclerView))
                .perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(0, hasDescendant(withText("From Russia with Love")))));

        onView(withId(R.id.homeRecyclerView))
                .perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));

        onView(withId(R.id.homeRecyclerView))
                .check(matches(atPosition(0, hasDescendant(withText("Goldfinger")))));
    }

    public static Matcher<View> atPosition(final int position, @NonNull final Matcher<View> itemMatcher) {
        checkNotNull(itemMatcher);
        return new BoundedMatcher<View, RecyclerView>(RecyclerView.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("has item at position " + position + ": ");
                itemMatcher.describeTo(description);
            }

            @Override
            protected boolean matchesSafely(final RecyclerView view) {
                RecyclerView.ViewHolder viewHolder = view.findViewHolderForAdapterPosition(position);
                if (viewHolder == null) {
                    // has no item on such position
                    return false;
                }
                return itemMatcher.matches(viewHolder.itemView);
            }
        };
    }
}

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Gradle Dependencies

dependencies {
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.2.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.3'
    implementation "androidx.recyclerview:recyclerview:1.1.0"
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.2.0'
}