Goods

最新推荐文章于 2023-06-04 11:47:13 发布

Mr. Yang_yz

最新推荐文章于 2023-06-04 11:47:13 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/qq_41637459/article/details/80471592

主xml

<?xml version="1.0" encoding="utf-8"?>

</LinearLayout>

子布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">

<ImageView
android:id="@+id/goods_pic"
android:layout_width="80dp"
android:layout_height="80dp"
android:scaleType="centerCrop"
android:src="@mipmap/ic_launcher" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="vertical">

<TextView
android:id="@+id/goods_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="2"
android:text="标题"
android:textSize="20sp" />

<TextView
android:id="@+id/goods_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="价格"
android:textColor="#FF0000" />
</LinearLayout>

</LinearLayout>

java 代码

public class GoodsActivity extends AppCompatActivity {
private PullToRefreshScrollView scrollView;
private ViewPager viewPager;
private List<ImageView> ads = new ArrayList<>();//轮播图集合
private List<ImageView> ps = new ArrayList<>();//小圆点集合
List<GoodsBean.DataBean> list = new ArrayList<>();//商品集合
private MyAdapter myAdapter;
private int page = 1;//页数
private GoodsAdapter goodsAdapter;
private LinearLayout ll_points;
private MyHandler myHandler = new MyHandler();
private MyListView listView;
private List<AdBean.DataBean> data;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_goods);
initView();
goodsAdapter = new GoodsAdapter(list, GoodsActivity.this);
listView.setAdapter(goodsAdapter);
getDataFromNet();
}
懒加载放到Fragment用这个，平时Activity不用这个

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);
    if (isVisibleToUser){
        getDataFromNet();
    }
}

private void initView() {
scrollView = findViewById(R.id.pull_to_refresh_scrollview);
viewPager = findViewById(R.id.goods_viewpager);
ll_points = findViewById(R.id.ll_points);
listView = findViewById(R.id.goods_listview);
//刷新
scrollView.setMode(PullToRefreshBase.Mode.BOTH);
scrollView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ScrollView> refreshView) {
//下拉
page = 1;
getGoodsListFromNet();
}

@Override
public void onPullUpToRefresh(PullToRefreshBase<ScrollView> refreshView) {
//上啦
page++;
getGoodsListFromNet();
}
});

//Viewpager 点击事件
viewPager.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
myHandler.removeCallbacksAndMessages(null);
break;
case MotionEvent.ACTION_UP:
myHandler.sendEmptyMessageDelayed(0, 1000);
break;
case MotionEvent.ACTION_MOVE:
myHandler.removeCallbacksAndMessages(null);
break;
}
return false;
}
});

}
//设置原点
class MyHandler extends Handler{
@Override
public void handleMessage(Message msg) {
viewPager.setCurrentItem(viewPager.getCurrentItem() + 1);
//设置小圆点
for (int i = 0; i < ps.size(); i++) {

if (i == viewPager.getCurrentItem() % ps.size()) {
ps.get(i).setSelected(true);
} else {
ps.get(i).setSelected(false);
}
}
myHandler.sendEmptyMessageDelayed(0, 1000);
}
}
//轮播图数据
private void getDataFromNet(){
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.get(HttpConfig.AD_URL);
httpUtils.setHttpUtilsListener(new HttpUtils.HttpUtilListener() {
@Override
public void getSuccess(String json) {
Gson gson = new Gson();
AdBean bean = gson.fromJson(json, AdBean.class);
data = bean.getData();
for (int i = 0; i< data.size(); i++){
String icon = data.get(i).getIcon();
ImageView imageView = new ImageView(GoodsActivity.this);
//缩放
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
ImageLoader.getInstance().displayImage(icon, imageView, MyApp.getOptions());
ads.add(imageView);
//点击吐司
final int finalI = i;
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(GoodsActivity.this, "--" + data.get(finalI),Toast.LENGTH_LONG ).show();
}
});
//添加小圆点
ImageView p = new ImageView(GoodsActivity.this);
p.setImageResource(R.drawable.ad_selector);

ps.add(p);
//设置小圆点间距
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(15, 0, 0, 0);
p.setLayoutParams(lp);
//将小圆点加入的布局里面
ll_points.addView(p, i);

}
//默认第一个选中
ps.get(0).setSelected(true);
//设置适配器
//轮播图适配器
myAdapter = new MyAdapter(ads);
viewPager.setAdapter(myAdapter);
//开始自动轮播
myHandler.sendEmptyMessageDelayed(0, 1000);
//请求商品列表
getGoodsListFromNet();
}

@Override
public void getError(String error) {

}
});

}
//获取商品数据
private void getGoodsListFromNet(){
HttpUtils httpUtils = HttpUtils.getInstance();
httpUtils.get(HttpConfig.GOODS_URL+page);
httpUtils.setHttpUtilsListener(new HttpUtils.HttpUtilListener() {
@Override
public void getSuccess(String json) {
Gson gson = new Gson();
GoodsBean goodsBean = gson.fromJson(json, GoodsBean.class);
List<GoodsBean.DataBean> data = goodsBean.getData();
if(page==1){
list.clear();
}
if(data.size()==0){
Toast.makeText(GoodsActivity.this,"没有数据了",Toast.LENGTH_SHORT).show();
}
list.addAll(data);
goodsAdapter.notifyDataSetChanged();
scrollView.onRefreshComplete();
}

@Override
public void getError(String error) {

}
});
}

}

适配器

public class GoodsAdapter extends BaseAdapter {
private List<GoodsBean.DataBean> list;
private Context context;

public GoodsAdapter(List<GoodsBean.DataBean> list, Context context) {
this.list = list;
this.context = context;
}

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

@Override
public Object getItem(int position) {
return list.get(position);
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView==null){
convertView= View.inflate(context, R.layout.goods_item,null);
holder=new ViewHolder();
holder.price= convertView.findViewById(R.id.goods_price);
holder.title= convertView.findViewById(R.id.goods_title);
holder.imageView= convertView.findViewById(R.id.goods_pic);
convertView.setTag(holder);
}else{
holder= (ViewHolder) convertView.getTag();
}

String images = list.get(position).getImages();
//截取url地址
String pic_url = images.split("\\|")[0];
ImageLoader.getInstance().displayImage(pic_url,holder.imageView, MyApp.getOptions());

holder.title.setText(list.get(position).getTitle());
holder.price.setText("价格"+list.get(position).getPrice());
return convertView;
}
class ViewHolder{
ImageView imageView;
TextView title;
TextView price;
}

}

MyList
public class MyListView extends ListView {
public MyListView(Context context) {
super(context);
}

public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
}

public MyListView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

int heigtSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, heigtSpec);
}

}