首页 > 系统 > Android > 正文

Android 仿淘宝商品属性标签页

2019-12-12 04:30:15
字体:
来源:转载
供稿:网友

这里写图片描述

需求

1.动态加载属性,如尺码,颜色,款式等

  由于每件商品的属性是不确定的,有的商品的属性是颜色和尺码,有的是口味,有的是大小,所以这些属性不能直接写死到页面上。

2.动态加载属性下的标签

  每个属性下的标签个数也不是一定的,比如有的商品的尺码是是S,M,XL,有的是均码,也就是每种属性的具体的内容是不一定的。

技术点

自定义ViewGroup,使其中的TextView可以依据内容长短自动换行,如下图所示

这里写图片描述

实现

布局

通过ListView来显示商品所有属性,每种属性作为ListView的Item。

<span style="font-family: Arial, Verdana, sans-serif;">自定义ViewGroup</span>

普通的LinearLayout只能横向和纵向显示控件,但是当一行显示不够时,无法自动换行,需要我们自定义布局容器。

<code class="hljs java">package jczb.shoping.common;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.View;import android.view.ViewGroup;public class MyViewGroup extends ViewGroup {  private final static int VIEW_MARGIN=15;  public MyViewGroup(Context context, AttributeSet attrs){   super(context, attrs);  }  public MyViewGroup(Context context) {   super(context);  }  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  int stages = 1;  int stageHeight = 0;  int stageWidth = 0;  int wholeWidth = MeasureSpec.getSize(widthMeasureSpec);  for (int i = 0; i < getChildCount(); i++) {   final View child = getChildAt(i);   // measure   measureChild(child, widthMeasureSpec, heightMeasureSpec);   stageWidth += (child.getMeasuredWidth() + VIEW_MARGIN);   stageHeight = child.getMeasuredHeight();   if (stageWidth >= wholeWidth) {    stages++;    //reset stageWidth    stageWidth = child.getMeasuredWidth();   }  }  int wholeHeight = (stageHeight + VIEW_MARGIN) * stages;  // report this final dimension  setMeasuredDimension(resolveSize(wholeWidth, widthMeasureSpec),    resolveSize(wholeHeight, heightMeasureSpec));  }  private int jiange = 10;//按钮之间的间隔  @Override  protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {   final int count = getChildCount();   int row=0;// which row lay you view relative to parent   int lengthX=arg1 ; // right position of child relative to parent   int lengthY=arg2; // bottom position of child relative to parent   for(int i=0;i<count;i++){ final="" view="" child="this.getChildAt(i);" int="" width="child.getMeasuredWidth();" height="child.getMeasuredHeight();" if(i="=" 0){="" lengthx+="width+VIEW_MARGIN;//第一个的时候不需要加" }else{="" +jiange;="" 按钮之间的间隔="" }="" lengthy="row*(height+VIEW_MARGIN)+VIEW_MARGIN+height+arg2;" if="" it="" can't="" drawing="" on="" a="" same="" line="" ,="" skip="" to="" next="" if(lengthx="">arg3){     lengthX=width+VIEW_MARGIN+arg1;     row++;     lengthY=row*(height+VIEW_MARGIN)+VIEW_MARGIN+height+arg2;    }    child.layout(lengthX-width, lengthY-height, lengthX, lengthY);   }  }}</code>

ListView的Adapter

<code class="hljs java">package jczb.shoping.adapter;import java.util.ArrayList;import java.util.HashMap;import jczb.shoping.common.MyViewGroup;import jczb.shoping.ui.R;import android.content.Context;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.os.Handler;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TableLayout;import android.widget.TextView;public class PropertyAdapter extends BaseAdapter { private Context mContext; private ArrayList<hashmap<string,object>> mList; private ArrayList<hashmap<string,textview[]>> mViewList; private Drawable drawableNormal ; private Drawable drawablePressed; private Handler mHandler; //用于保存用户的属性集合 private HashMap<string,string> selectProMap=new HashMap<string, string="">(); /**  * 返回选中的属性  * @return  */ public HashMap<string, string=""> getSelectProMap() {  return selectProMap; } public void setSelectProMap(HashMap<string, string=""> selectProMap) {  this.selectProMap = selectProMap; } public PropertyAdapter(Handler handler,Context context,ArrayList<hashmap<string,object>> list){  super();  this.mHandler=handler;  this.mContext=context;  this.mList=list;  mViewList=new ArrayList<hashmap<string,textview[]>>();  drawableNormal=mContext.getResources().getDrawable(R.drawable.tv_property_label); } @Override public int getCount() {  // TODO Auto-generated method stub  return mList.size(); } @Override public Object getItem(int position) {  // TODO Auto-generated method stub  return mList.get(position); } @Override public long getItemId(int position) {  // TODO Auto-generated method stub  return position; } @Override public View getView(int position, View convertView, ViewGroup parent) {  ViewHolder holder = null;  if (convertView == null) {   // 获取list_item布局文件的视图   convertView = LayoutInflater.from(this.mContext).inflate(R.layout.lv_property_item, null,true);   holder = new ViewHolder();   // 获取控件对象   holder.tvPropName= (TextView) convertView     .findViewById(R.id.tv_property_name);   //holder.llPropContents=(LinearLayout)convertView.findViewById(R.id.ll_property_content);   //holder.tlPropContents=(TableLayout)convertView.findViewById(R.id.ll_property_content);   // 设置控件集到convertView   holder.vgPropContents= (MyViewGroup) convertView.findViewById(R.id.myviewgroup);   convertView.setTag(holder);  } else {   holder = (ViewHolder) convertView.getTag();  }  if (this.mList != null) {   //HashMap<string,textview[]> mapView=new HashMap<string,>();   ArrayList<string> lables = (ArrayList<string>) this.mList.get(position).get("lable");   String type = (String) this.mList.get(position).get(     "type");   holder.tvPropName.setText(type);//规格名称   //动态加载标签   //判断布局中的子控件是否为0,如果不为0,就不添加了,防止ListView滚动时重复添加   if(holder.vgPropContents.getChildCount()==0){    TextView[] textViews = new TextView[lables.size()];    //设置每个标签的文本和布局    //TableRow tr=new TableRow(mContext);     for (int i = 0; i < lables.size(); i++) {      TextView textView = new TextView(mContext);      textView.setGravity(17);      textView.setPadding(25,15,25,15);          textViews[i] = textView;      textViews[i].setBackgroundResource(R.drawable.tv_property_label);      textViews[i].setText(lables.get(i));      textViews[i].setTag(i);      //textViews[i].setBackgroundColor(Color.parseColor("#EE5500"));      //tr.addView(textViews[i]);     // holder.llPropContents.addView(textViews[i]);      holder.vgPropContents.addView(textViews[i]);     }     //holder.tlPropContents.addView(tr);     //绑定标签的Click事件     for(int j=0;j<textviews.length;j++){ string="" void="" viewholder="" view="" v="(TextView)" tv="(TextView)v;" this.type="type;" textviews="(TextView[])v.getTag();" textview="" tablelayout="" return="" public="" private="" override="" new="" myviewgroup="" linearlayout="" lableclicklistener="" int="" implements="" i="0;i<textViews.length;i++){" h="0;h<holder.vgPropContents.getChildCount();h++){" code=""></textviews.length;j++){></string></string></string,></string,textview[]></hashmap<string,textview[]></hashmap<string,object></string,></string,></string,></string,string></hashmap<string,textview[]></hashmap<string,object></code>

总结

  这里关键就是实现自定义的ViewGroup,重写onMeasure和onLayout方法,判断新添加的控件有没有超出屏幕的宽度来决定是否要换行。

以上所述是小编给大家介绍的Android 仿淘宝商品属性标签页,希望对大家有所帮助,如果大家有任何疑问欢迎给我留言,小编会及时回复大家的,在此也非常感谢大家对武林网网站的支持!

发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表