Android--- 仿淘宝商品详情页

话不多说---先上效果图：

图1 商品详情页

图2 加入购物车点击事件

需求分析：

图1中主要需要实现的效果：

1.轮播图

2.顶部导航栏的渐变

3.顶部导航栏随着滑动的位置选择对应的值以及点击滑动到对应位置

图2中主要需要实现的效果：

1.界面从底部出场的效果

2.参数选择的瀑布流式效果

技术分析：

图1：

1.轮播图，可以采用自定义（ViewPager的使用），也可以用直接用第三方库。这里我采用的是

https://github.com/youth5201314/banner  （这个是在GitHub上，搜banner，排第一的。选这个跟我自己买东西的心态一样，不知道哪个好，买贵的就对了，哈哈哈）

2.顶部导航栏的渐变，这个效果，我是通过滑动监听，在自己划分的几个区域内，设置不同的透明度。“生硬”的实现了渐变的效果，为了不那么生硬透明度基本等距变化。（如果你有更好的实现方法，欢迎骚扰~）

3.第三点，也是通过对滑动监听实现的。

图2：

1.底部出场，只需要设置一个布局参数属性就行 Gravity.BOTTOM ，动画的话就用

overridePendingTransition(R.anim.bottom_static, R.anim.bottom_out);

2.第二个效果，可以使用recyclerview嵌套recyclerview实现；也可以用ExpandableListView实现；也可以用FlowLayout实现。因为时间比较急，所以用了FlowLayout简单的实现了上述效果。

具体实现：

图1:

关键地方都有注解，认真康康，如果有疑惑的，随时联系我。（取名这块，我的可能有点乱，欢迎指导~）

布局xml文件：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/grey_200"
    >


    <androidx.core.widget.NestedScrollView
        android:id="@+id/cd_sv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fillViewport="true"
        android:scrollbarSize="0dp"
        android:scrollbars="vertical">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="600dp"
          >


            <com.youth.banner.Banner
                android:id="@+id/cd_banner"
                android:layout_width="match_parent"
                android:layout_height="450dp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:is_auto_loop="false"
                app:is_infinite_loop="false"/>

            <TextView
                android:id="@+id/cd_tv"
                android:layout_width="wrap_content"
                android:layout_height="70dp"
                android:background="@color/grey_000"
                android:text="    A21夏季2020男装多口袋工装裤 男士九分裤束脚休闲裤潮牌男裤子"
                android:textSize="17sp"
                android:textStyle="bold"
                android:gravity="center_vertical"
                android:textColor="@color/grey_900"
                android:drawableStart="@drawable/ic_share"
                android:padding="8dp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/cd_banner" />

            <TextView
                android:id="@+id/cd_params"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                android:text="参数选择"
                android:layout_marginStart="5dp"
                app:layout_constraintStart_toStartOf="@+id/cd_tv"
                app:layout_constraintTop_toBottomOf="@+id/cd_tv" />

            <TextView
                android:id="@+id/cd_tv_param"
                android:layout_width="match_parent"
                android:layout_height="30dp"
                android:background="@color/grey_000"
                android:text="选择码数，颜色分类"
                android:gravity="center_vertical"
                app:layout_constraintStart_toStartOf="@+id/cd_params"
                app:layout_constraintTop_toBottomOf="@+id/cd_params" />

            <TextView
                android:id="@+id/tv1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                android:layout_marginStart="5dp"
                android:text="宝贝评价"
                app:layout_constraintStart_toStartOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/cd_tv_param" />

            <TextView
                android:id="@+id/tv_comment_more"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                android:text="查看全部     >   "
                android:textColor="@color/colorAccent"
                app:layout_constraintEnd_toEndOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/cd_tv_param" />


            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/cd_rcv"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_constraintStart_toStartOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/tv1" />

            <TextView
                android:id="@+id/tv2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                android:layout_marginStart="5dp"
                android:text="商品详情"
                app:layout_constraintStart_toStartOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/cd_rcv" />

            <ImageView
                android:id="@+id/iv1"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                android:src="@drawable/cd_ad5"
                android:scaleType="fitXY"
                app:layout_constraintStart_toStartOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/tv2" />

            <ImageView
                android:id="@+id/iv2"
                android:layout_width="wrap_content"
                android:layout_height="550dp"
                android:src="@drawable/cd_ad6"
                android:scaleType="fitStart"
                app:layout_constraintStart_toStartOf="@+id/cd_tv_param"
                app:layout_constraintTop_toBottomOf="@+id/iv1" />

        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.core.widget.NestedScrollView>

    <LinearLayout
        android:id="@+id/cd_ll"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_gravity="top"
        android:background="@color/grey_000"
        android:orientation="horizontal"
        android:visibility="invisible">

        <TextView
            android:id="@+id/cd_tv_commodity"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="宝贝"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/cd_tv_comment"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="评价"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/cd_tv_details"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="详情"
            android:textSize="16sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="@color/grey_100"
        android:orientation="horizontal">

        <com.apeman.mall.custom.MyImageButton
            android:id="@+id/mib_shop"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            app:src="@mipmap/ic_shop"
            app:text="店铺"
            app:textSize="12sp" />

        <com.apeman.mall.custom.MyImageButton
            android:id="@+id/mib_service"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            app:src="@mipmap/ic_service"
            app:text="客服"
            app:textSize="12sp" />

        <com.apeman.mall.custom.MyImageButton
            android:id="@+id/mib_collect"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            app:src="@mipmap/ic_collect"
            app:text="收藏"
            app:textSize="12sp"/>
        <Button
            android:id="@+id/bt_addShopping"
            android:layout_width="0dp"
            android:layout_height="35dp"
            android:layout_weight="2"
            android:layout_gravity="center"
            android:background="@drawable/btn_bg_left_round"
            android:text="加入购物车"
            android:textColor="@android:color/white"
            />
        <Button
            android:id="@+id/bt_purchase"
            android:layout_width="0dp"
            android:layout_height="35dp"
            android:layout_weight="2"
            android:layout_gravity="center"
            android:layout_marginEnd="2dp"
            android:background="@drawable/btn_bg_right_round"
            android:text="立即购买"
            android:textColor="@android:color/white"
            />
    </LinearLayout>

</FrameLayout>

 代码：

/**
 * @author QCoder
 * @date 2020/5/6
 */
public class CommodityDetailsActivity extends AppCompatActivity implements View.OnClickListener {
    private List<DataBean> beans;
    private Banner banner;
    private NestedScrollView mSV;
    private TextView tv_commodity;
    private TextView tv_comment;
    private TextView tv_details;
    private TextView tv1;
    private TextView tv2;
    private TextView paramOption;
    private LinearLayout cd_ll;
    private int mTop1;
    private int mTop2;
    private int mTop3;

    private MyImageButton mib_shop;
    private MyImageButton mib_service;
    private MyImageButton mib_collect;

    private Button bt_addShopping;
    private Button bt_purchase;

    private List<CommentBean> commentBeans;
    private boolean isCollect = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActionBar actionBar = getSupportActionBar();
        if(actionBar!=null){
            actionBar.hide();
        }
        setContentView(R.layout.activity_commodity_details);
        initView();
    }

    public static void start(Context context) {
        Intent intent = new Intent(context, CommodityDetailsActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }


    /**
     * 初始化界面
     */
    private void initView() {
        //banner 数据初始化
        initBannerData();
        //评论 数据初始化
        initComment();

        mSV = findViewById(R.id.cd_sv);
        tv_commodity = findViewById(R.id.cd_tv_commodity);
        tv_comment = findViewById(R.id.cd_tv_comment);
        tv_details = findViewById(R.id.cd_tv_details);
        tv1 = findViewById(R.id.tv1);
        tv2 = findViewById(R.id.tv2);
        paramOption =findViewById(R.id.cd_tv_param);
        cd_ll = findViewById(R.id.cd_ll);
        RecyclerView rcv = findViewById(R.id.cd_rcv);

        mib_shop = findViewById(R.id.mib_shop);
        mib_service = findViewById(R.id.mib_service);
        mib_collect = findViewById(R.id.mib_collect);
        //添加适配器
        CommentAdapter commentAdapter = new CommentAdapter(this);

        commentAdapter.setBeanList(commentBeans);
        //设置RecyclerView
        rcv.setLayoutManager(new LinearLayoutManager(this));
        rcv.setHasFixedSize(true);
        rcv.setAdapter(commentAdapter);
        rcv.setNestedScrollingEnabled(false);

        bt_addShopping = findViewById(R.id.bt_addShopping);
        bt_purchase =findViewById(R.id.bt_purchase);
        //banner初始化
        initBanner();
        initListener();


    }

    /**
     * 初始化 轮播图的数据
     */
    private void initBannerData() {
        beans = new ArrayList<>();
        DataBean dataBean1 = new DataBean(R.drawable.cd_ad1, "");
        beans.add(dataBean1);
        DataBean dataBean2 = new DataBean(R.drawable.cd_ad2, "");
        beans.add(dataBean2);
        DataBean dataBean3 = new DataBean(R.drawable.cd_ad3, "");
        beans.add(dataBean3);
        DataBean dataBean4 = new DataBean(R.drawable.cd_ad4, "");
        beans.add(dataBean4);
        DataBean dataBean5 = new DataBean(R.drawable.cd_ad5, "");
        beans.add(dataBean5);
    }

    /**
     * 初始化轮播图
     */
    private void initBanner() {
        banner = findViewById(R.id.cd_banner);
        banner.setAdapter(new ImageAdapter(beans))
                .setIndicator(new CircleIndicator(this))
                .setPageTransformer(new DepthPageTransformer())
                .start();
    }

    /**
     * 初始化监听事件
     */
    private void initListener() {
        tv_commodity.setOnClickListener(this);
        tv_comment.setOnClickListener(this);
        tv_details.setOnClickListener(this);
        paramOption.setOnClickListener(this);
        //监听滚动事件，实现对应按钮变色，已经顶部栏的渐变
        mSV.setOnScrollChangeListener((NestedScrollView.OnScrollChangeListener) (v, scrollX, scrollY, oldScrollX, oldScrollY) -> {
            if (scrollY == 0) {
                //隐藏顶部栏
                cd_ll.setVisibility(View.INVISIBLE);
            } else if (scrollY < mTop2 / 2) {
                cd_ll.setVisibility(View.VISIBLE);
                //设置顶部栏的透明度
                cd_ll.getBackground().setAlpha(50);
            } else if (scrollY < mTop2) {  //在【宝贝】区域中，顶部栏中的【宝贝】被标记
                //清除字体颜色
                clearColor();
                cd_ll.getBackground().setAlpha(130);
                //设置选中的字体颜色
                tv_commodity.setTextColor(getResources().getColor(R.color.colorAccent));
            } else if (scrollY < mTop3 / 2) {
                cd_ll.getBackground().setAlpha(200);
            } else if (scrollY < mTop3) {
                clearColor();
                cd_ll.getBackground().setAlpha(255);
                tv_comment.setTextColor(getResources().getColor(R.color.colorAccent));
            } else {
                clearColor();
                tv_details.setTextColor(getResources().getColor(R.color.colorAccent));
            }
        });//mSV

        mib_shop.setOnClickListener(this);
        mib_service.setOnClickListener(this);
        mib_collect.setOnClickListener(this);

        bt_addShopping.setOnClickListener(this);
        bt_purchase.setOnClickListener(this);
    }

    /**
     * 清除字体颜色
     */
    private void clearColor() {
        tv_commodity.setTextColor(ContextCompat.getColor(this,R.color.grey_800));
        tv_comment.setTextColor(ContextCompat.getColor(this,R.color.grey_800));
        tv_details.setTextColor(ContextCompat.getColor(this,R.color.grey_800));
    }

    /**
     * 初始化 评论数据
     */
    private void initComment() {
        commentBeans = new ArrayList<>();
        CommentBean commentBean1 = new CommentBean(ContextCompat.getDrawable(this, R.drawable.ic_hot), "用户1", "整体评价：版型非常好，给老爸买的，非常喜欢，非常满意 面料品质：加了蚕丝，质感很好，面料偏哑光，显得有档次 厚薄度：初春季节正合适");
        commentBeans.add(commentBean1);
        CommentBean commentBean2 = new CommentBean(ContextCompat.getDrawable(this, R.drawable.ic_new), "用户2", "大小合适，偏长（打死不认我腿短），偏宽（休闲裤偏直筒，微修身）总体一般吧，面料丝滑");
        commentBeans.add(commentBean2);
        CommentBean commentBean3 = new CommentBean(ContextCompat.getDrawable(this, R.drawable.onsale), "用户3", "上身效果：跟图一样的，很好看 厚薄度：恰好，春天和夏天穿都很合适 尺码推荐：尺码标准的 整体评价：非常不错，已经第二次购买了 材质特性：很好 面料品质：质量很好，不会起球");
        commentBeans.add(commentBean3);
        CommentBean commentBean4 = new CommentBean(ContextCompat.getDrawable(this, R.drawable.ic_vip), "用户4", "整体评价：休闲百搭 裤子不错，以前穿过a21。 面料品质：舒服");
        commentBeans.add(commentBean4);
    }

    /**
     * 点击事件
     *
     * @param v 控件
     */
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.cd_tv_commodity:
                mSV.smoothScrollTo(0, mTop1);
                break;
            case R.id.cd_tv_comment:
                mSV.smoothScrollTo(0, mTop2);
                break;
            case R.id.cd_tv_details:
                mSV.smoothScrollTo(0, mTop3);
                break;
            case R.id.mib_shop:
                //TODO 跳到商家页
                ToastUtil.showToast("功能开发中...");
                break;
            case R.id.mib_service:
                //TODO 跳到与客服的聊天页
                ToastUtil.showToast("待开发中...");
                break;
            case R.id.mib_collect:
                if (!isCollect){
                    ToastUtil.showToast("收藏成功~");
                    mib_collect.setImageView(R.mipmap.ic_collect_pressed);
                    isCollect = true;
                }else {
                    ToastUtil.showToast("取消收藏~");
                    mib_collect.setImageView(R.mipmap.ic_collect);
                    isCollect = false;
                }
                break;
            case R.id.cd_tv_param:
            case R.id.bt_addShopping:
                Intent intent = new Intent(this,ParameterActivity.class);
                intent.putExtra("type","addCart");
                startActivity(intent);
                overridePendingTransition(R.anim.bottom_in,R.anim.bottom_static);
                break;
            case R.id.bt_purchase:
                Intent intent2 = new Intent(this,ParameterActivity.class);
                intent2.putExtra("type","purchase");
                startActivity(intent2);
                //启动图2活动需要添加的效果
                overridePendingTransition(R.anim.bottom_in,R.anim.bottom_static);
                break;
            default:
                break;
        }
    }

    /**
     * 该活动获得焦点后获取布局上 某些控件的顶部位置，为滚动监听动作服务
     *
     * @param hasFocus 是否获得焦点
     */
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        mTop1 = banner.getTop();
        mTop2 = tv1.getTop();
        mTop3 = tv2.getTop();
    }
}

图2：

xml布局：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    tools:context=".home.activity.ParameterActivity">

    <ImageView
        android:id="@+id/param_pic"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="20dp"
        android:src="@drawable/ad_it"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/param_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginTop="47dp"
        android:text="$"
        android:textColor="@android:color/holo_red_light"
        android:textSize="25sp"
        android:textStyle="bold"
        app:layout_constraintStart_toEndOf="@+id/param_pic"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/param_price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="2dp"
        android:layout_marginTop="47dp"
        android:text="599"
        android:textColor="@android:color/holo_red_light"
        android:textSize="25sp"
        android:textStyle="bold"
        app:layout_constraintStart_toEndOf="@+id/param_tv"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/param_tv2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        android:text="库存"
        app:layout_constraintStart_toEndOf="@+id/param_pic"
        app:layout_constraintTop_toBottomOf="@+id/param_tv" />

    <TextView
        android:id="@+id/param_store"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="1254"
        app:layout_constraintStart_toEndOf="@+id/param_tv2"
        app:layout_constraintTop_toBottomOf="@+id/param_price" />

    <TextView
        android:id="@+id/param_tv3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="91dp"
        android:text="件"
        app:layout_constraintStart_toEndOf="@+id/param_store"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/param_divider"
        android:layout_width="match_parent"
        android:layout_height="1.5dp"
        android:layout_marginStart="10dp"
        android:layout_marginTop="25dp"
        android:background="@color/grey_200"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_pic" />
    <TextView
        android:id="@+id/param_tv4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="属性A"
        android:layout_marginStart="10dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_divider" />

    <com.google.android.material.internal.FlowLayout
        android:id="@+id/param_flow"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginTop="5dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_tv4" />

    <ImageView
        android:id="@+id/param_divider2"
        android:layout_width="match_parent"
        android:layout_height="1.5dp"
        android:layout_marginStart="10dp"
        android:layout_marginTop="5dp"
        android:background="@color/grey_200"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_flow" />
    <TextView
        android:id="@+id/param_tv5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="属性B"
        android:layout_marginStart="10dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_divider2" />
    <com.google.android.material.internal.FlowLayout
        android:id="@+id/param_flow2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginTop="5dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/param_tv5" />

    <Button
        android:id="@+id/param_btn_ensure"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_margin="5dp"
        android:background="@drawable/btn_bg_round"
        android:text="确 认"
        android:textColor="@color/white"
        android:textSize="16sp"
        app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

代码：

/**
 * @Author QCoder
 * @Date 2020/5/13
 * @Description 参数选择页
 */
public class ParameterActivity extends Activity implements View.OnClickListener {

    private Button ensure;
    private FlowLayout flowLayout;
    private FlowLayout flowLayout2;
    private List<DataBean> list;
    private String type;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_parameter);
        type = getIntent().getStringExtra("type");
        //设置该Activity出场方式
        WindowManager m = getWindowManager();
        Display d = m.getDefaultDisplay(); // 为获取屏幕宽、高
        android.view.WindowManager.LayoutParams p = getWindow().getAttributes();
        p.height = (int) (d.getHeight() * 0.8); // 高度设置为屏幕的0.8
        p.width = d.getWidth(); // 宽度设置为屏幕的0.7
        p.gravity = Gravity.BOTTOM;
        getWindow().setAttributes(p);

        initView();
        initListener();
        initData(flowLayout);
        initData(flowLayout2);

    }

    public static void start(Context context) {
        Intent intent = new Intent(context, ParameterActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }

    /**
     * 初始化界面
     */
    private void initView() {
        ensure = findViewById(R.id.param_btn_ensure);
        if (type.equals("purchase")){
            ensure.setText("立即购买");
        }else {
            ensure.setText("加入购物车");
        }
        flowLayout = findViewById(R.id.param_flow);
        flowLayout2 = findViewById(R.id.param_flow2);
    }

    /**
     *初始化监听事件
     */
    private void initListener() {
        ensure.setOnClickListener(this);
    }

    /**
     * 初始化数据
     * @param mFlowLayout 需要加载数据的布局
     */
    private void initData(FlowLayout mFlowLayout) {
        list = new ArrayList<>();
        DataBean dataBean = new DataBean(R.drawable.ic_new, "猿人新品");
        list.add(dataBean);
        list.add(dataBean);
        list.add(dataBean);

        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        layoutParams.setMargins(10, 5, 10, 5);
        if (mFlowLayout != null) {
            mFlowLayout.removeAllViews();
        }
        for (int i = 0; i < list.size(); i++) {
            MyImageButton myImageButton = new MyImageButton(this);
            myImageButton.setHorizontal(true);
            myImageButton.setBackground(getDrawable(R.drawable.btn_bg_round2));
            myImageButton.setLayoutParams(layoutParams);
            int finalI = i;
            //设置点击事件
            myImageButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    ToastUtil.showToast("点击" + list.get(finalI).getUrl());
                }
            });
            myImageButton.setImageView(list.get(i).getImageRes());
            myImageButton.setText(list.get(i).getUrl());
            mFlowLayout.addView(myImageButton, layoutParams);
        }

    }

    /**
     * 活动结束时，设置退场对话
     */
    @Override
    public void finish() {
        super.finish();
        overridePendingTransition(R.anim.bottom_static, R.anim.bottom_out);
    }

    /**
     * 点击事件
     * @param v
     */
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.param_btn_ensure:
               if (type.equals("purchase")){
                   ToastUtil.showToast("购买成功");
               }else {
                   ToastUtil.showToast("宝贝在购物车等主人哦~");
               }
                finish();
                break;
        }
    }
}

额外的布局文件：

bottom_in的布局文件

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:fromYDelta="100%"
        android:toYDelta="0"
        android:duration="300"
        />
</set>

bottom_out的布局文件

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:fromYDelta="25"
        android:toYDelta="100%"
        android:duration="300"
        />
</set>

bottom_static

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:fromYDelta="1"
        android:toYDelta="1"
        android:duration="300" />
</set>

---

欢迎大家多多指教~

来源：oschina

链接：https://my.oschina.net/u/4404772/blog/4282073