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Android Assignment 03

Introduction to Fragments

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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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Hint

To pass data between activities, use a Singleton pattern. Example implementation of MovieDb class to access search result list

package de.hdmstuttgart.movietracker;

import java.util.ArrayList;
import java.util.List;

class MovieDb {

    private static MovieDb instance;

    private MovieDb() {

    }

    public static MovieDb getInstance() {
        if (instance == null) {
            instance = new MovieDb();
        }

        return instance;
    }

    public List<Movie> savedMovies = new ArrayList<>();

}

Call MovieDb.getInstance().savedMovies.xxx to access instance of saved movies

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Views

MainActivity

On app start

With single saved movie

With multipe saved moviews

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SearchActivity

On activity start

With search result

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Movie 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.action.ViewActions.closeSoftKeyboard;
import static androidx.test.espresso.action.ViewActions.replaceText;
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 Assignment3Test {

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

    @Test
    public void assignment3Test() {

        onView(withId(R.id.searchBtn))
                .perform(click());

        onView(withId(R.id.searchMovieTitleEditText))
                .perform(replaceText("Gold"), closeSoftKeyboard());

        onView(withId(R.id.searchMovieTitleButton))
                .perform(click());

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

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

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

        onView(withId(R.id.searchBtn))
                .perform(click());

        onView(withId(R.id.searchMovieTitleEditText))
                .perform(replaceText("uss"), closeSoftKeyboard());

        onView(withId(R.id.searchMovieTitleButton))
                .perform(click());

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

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

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

    }

    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:2.0.4'
    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:rules:1.3.1-alpha02'
    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.4.0-alpha02'
}