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

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网站的支持！