[Android] 이미지 슬라이드 + Retrofit2 (AdapterViewFlipper)

서버쪽에서 등록한 이미지를 Api 로 받고 쇼핑몰 광고 배너처럼 자동 슬라이드 될 수 있도록 해보자

 

 

* activity_brand (Layout)

  <RelativeLayout
        android:layout_gravity="center"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <AdapterViewFlipper
            android:id="@+id/avf_banner"
            android:layout_alignParentBottom="true"
            android:layout_centerInParent="true"
            android:layout_width="match_parent"
            android:layout_height="100dp"/>
 
    </RelativeLayout>

 

 

* Retrofit2 : ClientClass, ServiceClass 만들기(코드 생략)

 

 

* BannerResponse & Banner (api model)

public class BannerResponse {
	
    private List<Banner> result;

    public List<Banner> getResult() {
        return result;
    }

    public void setResult(List<Banner> result) {
        this.result = result;
    }


    public static class Banner {
        private int id;
        private String image;

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getImage() {
            return image;
        }

        public void setImage(String image) {
            this.image = image;
        }
    }
}

 

 

* item_banner

<android.support.constraint.ConstraintLayout 
	xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <ImageView
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:id="@+id/iv_banner"
        android:layout_width="match_parent"
        android:layout_height="100dp"/>
        
</android.support.constraint.ConstraintLayout>

 

 

* BannerFlipperAdapter 

public class BannerFlipperAdapter extends BaseAdapter {
    private Context mContext;
    private List<BannerResponse.Banner> mItemList;

    public BrandFlipperAdapter(Context context, List<AdsResponse.Ads> itemList) {
        this.mContext = context;
        this.mItemList = itemList;
    }

    @Override
    public int getCount() {
        return mItemList.size();
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {

        BannerResponse.Banner banner = mItemList.get(i);

        View v = LayoutInflater.from(context).inflate(R.layout.item_banner, null);
        ImageView imageView = v.findViewById(R.id.iv_banner);
        Glide.with(context).load(banner.getImage()).into(imageView);

        return v;
    }
}

 

 

* BannerActivity (Activity)

- setFlipInterval : 슬라이드 속도

- setAutoStart : 자동 슬라이드 on/off

- setIn/OutAnimation : 애니메이션 효과

public class BannerActivity extends AppCompatActivity {

    private AdapterViewFlipper adapterViewFlipper;
    private ApiService apiService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_brand);
        initViews();
        remoteBanner();
    }

    private void initViews() {
        adapterViewFlipper = findViewById(R.id.avf_banner);
        apiService = ApiClient.getClient().create(ApiService.class);
    }

    private void remoteBanner() {
        apiService.getBanner("param").enqueue(new Callback<BannerResponse>() {
            @Override
            public void onResponse(Call<BannerResponse> call, Response<BannerResponse> response) {
                if (response.body() != null) {
                    List<BannerResponse.Banner> bannerList = response.body().getResult();
                    adapterViewFlipper.setAdapter(new BrandFlipperAdapter(getApplicationContext(), bannerList));
                    adapterViewFlipper.setFlipInterval(2000);
                    adapterViewFlipper.setAutoStart(true);
                    adapterViewFlipper.setInAnimation(getApplicationContext(), R.animator.banner_left_in);
                    adapterViewFlipper.setOutAnimation(getApplicationContext(), R.animator.banner_right_out);
                    adapterViewFlipper.startFlipping();
                }
            }

            @Override
            public void onFailure(Call<BannerResponse> call, Throwable t) {
                Log.d(TAG, t.toString());
            }
        });
    }
}

 

 

* AdapterViewFlipper 에 애니메이션을 적용하려면 'anim' 이 아닌 'animator' 폴더를 생성해야함

- left_in (왼쪽에서 들어와서)

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:propertyName="x"
    android:valueType="floatType"
    android:valueFrom="-1500"
    android:valueTo="0"
    android:duration="600"/>

- right_out (오른쪽으로 나감)

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator"
    android:propertyName="x"
    android:valueType="floatType"
    android:valueFrom="0"
    android:valueTo="1500"
    android:duration="600"/>

 

 

참고 - Stack Overflow