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呐喊教程网站的支持!
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