Final Touches

app/src/main/AndroidManifest.xml

@@ -40,7 +40,9 @@
                <data android:scheme="@string/fb_login_protocol_scheme" />
            </intent-filter>
        </activity>
        <activity android:name=".ImagesActivity"></activity>
        <activity
            android:name=".ImagesActivity"
            android:screenOrientation="portrait" />
    </application>

</manifest>

app/src/main/java/dragosholban/com/bestphotos/MainActivity.java

@@ -26,6 +26,14 @@ protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        boolean loggedIn = AccessToken.getCurrentAccessToken() != null;
        if (loggedIn) {
            Intent intent = new Intent(this, ImagesActivity.class);
            this.startActivity(intent);

            return;
        }

        LoginButton loginButton = findViewById(R.id.login_button);
        loginButton.setReadPermissions(Arrays.asList("user_photos"));

app/src/main/res/layout/activity_main.xml

@@ -6,13 +6,42 @@
    android:layout_height="match_parent"
    tools:context="dragosholban.com.bestphotos.MainActivity">

    <ImageView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/background" />

    <com.facebook.login.widget.LoginButton
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:paddingTop="15dp"
        android:paddingBottom="15dp"
        android:paddingLeft="15dp"
        android:paddingRight="15dp"/>

    <TextView
        android:id="@+id/textView2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:lineSpacingExtra="8sp"
        android:padding="16dp"
        android:text="Please connect using your Facebook account so we can access your photos and show you the best ones."
        android:textAlignment="center"
        android:textColor="@android:color/white"
        android:textSize="18sp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>