ListView实现物流追踪
目前我的一个项目中需要物流追踪界面实现，我想到时候ListView来实现物流追踪界面。下面我们先来看一下界面实现的效果：
该效果完全是使用ListView来实现了，下面我们来看一下是如何实现的
（一）：布局ListView并编写Item布局
首先需要在布局上面编写ListView：
```
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.bobo.trace.MainActivity" >
<ListView
android:id="@+id/lv_trace"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@drawable/trace_divider"
android:dividerHeight="1dp"></ListView>
</RelativeLayout>
```
然后编写ListView的item布局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:id="@+id/rl_trace_item"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:id="@+id/v_up_line"
android:layout_width="2.5dp"
android:layout_height="10dp"
android:background="@color/mgrey"
android:layout_marginLeft="22dp"></View>
<ImageView
android:id="@+id/iv_state"
android:layout_width="16dp"
android:layout_height="16dp"
android:src="@drawable/circle"
android:layout_marginTop="10dp"
android:layout_marginLeft="15dp"/>
<TextView
android:id="@+id/tv_trace_info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_toRightOf="@id/iv_state"
android:layout_marginLeft="20dp"
android:text="@string/test_trace_info"
android:textColor="@android:color/black"
android:textSize="13sp"/>
<LinearLayout
android:id="@+id/ll_trace_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:layout_toRightOf="@id/iv_state"
android:layout_marginLeft="20dp"
android:orientation="horizontal"
android:layout_below="@id/tv_trace_info">
<TextView
android:id="@+id/tv_phone_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/phone_label"
android:textColor="@android:color/black"
android:textSize="13sp"/>
<TextView
android:id="@+id/tv_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:text="@string/test_phone"
android:textColor="@android:color/black"
android:textSize="13sp"/>
</LinearLayout>
<TextView
android:id="@+id/tv_trace_time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:layout_toRightOf="@id/iv_state"
android:layout_marginLeft="20dp"
android:text="@string/test_trace_info"
android:textColor="@android:color/black"
android:textSize="13sp"
android:layout_below="@id/ll_trace_phone"/>
<View
android:id="@+id/v_down_line"
android:layout_width="2.5dp"
android:layout_height="45dp"
android:background="@color/mgrey"
android:layout_below="@id/iv_state"
android:layout_marginLeft="22dp"></View>
</RelativeLayout>
</RelativeLayout>
下面我们来看一下item效果：
在上面的效果图中，我们就可以看出，在这个item布局中，左边是”线-图片-线“的布局，显示一个时间轴，右边显示相应的信息，包括物流信息，联系电话和时间；我们知道，在时间轴中，第一个点是不需要上面那个线的，最后一个点是不需要下面那个线的，所以，这个的处理就需要我们在Adapter中进行相应的处理。
（二）：自定义Adapter
下面我们就需要自定义Adapter来填充数据和进行View处理。
当然，在编写Adapter之前，我们需要一个javabean来保存相应的信息。
Trace.java:
package com.bobo.beans;
public class Trace {
private boolean isHead;
private String info;
private String phone;
private String time;
public Trace(boolean isHead, String info, String phone, String time) {
super();
this.isHead = isHead;
this.info = info;
this.phone = phone;
this.time = time;
}
public boolean isHead() {
return isHead;
}
public void setHead(boolean isHead) {
this.isHead = isHead;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
}
下面我们就可以愉快的编写Adapter类了：
package com.bobo.adapters;
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.bobo.beans.Trace;
import com.bobo.trace.R;
public class TraceAdapter extends BaseAdapter {
private ArrayList<Trace> tradeLists = null;
private LayoutInflater inflater;
private Context context;
public TraceAdapter(ArrayList<Trace> tradeLists,Context context){
this.tradeLists = tradeLists;
this.context = context;
this.inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return tradeLists == null ? 0 : tradeLists.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return tradeLists.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) {
Holder holder;
if(convertView == null){
convertView = inflater.inflate(R.layout.trace_item, null);
holder = new Holder();
holder.v_up_line = (View)convertView.findViewById(R.id.v_up_line);
holder.iv_state = (ImageView)convertView.findViewById(R.id.iv_state);
holder.tv_trace_info = (TextView)convertView.findViewById(R.id.tv_trace_info);
holder.ll_trace_phone = (LinearLayout)convertView.findViewById(R.id.ll_trace_phone);
holder.tv_phone = (TextView)convertView.findViewById(R.id.tv_phone);
holder.tv_trace_time = (TextView)convertView.findViewById(R.id.tv_trace_time);
holder.v_down_line = (View)convertView.findViewById(R.id.v_down_line);
convertView.setTag(holder);
}else{
holder = (Holder)convertView.getTag();
}
if(tradeLists.get(position).isHead()){
holder.v_up_line.setVisibility(View.GONE);
//holder.iv_state = (ImageView)convertView.findViewById(R.id.iv_state);
holder.tv_trace_info.setText(tradeLists.get(position).getInfo());
holder.tv_phone.setText(tradeLists.get(position).getPhone());
holder.tv_trace_time.setText(tradeLists.get(position).getTime());
holder.v_down_line.setVisibility(View.VISIBLE);
}else if(tradeLists.size() == (position+1)){
holder.tv_trace_info.setText(tradeLists.get(position).getInfo());
holder.ll_trace_phone.setVisibility(View.GONE);
holder.tv_trace_time.setText(tradeLists.get(position).getTime());
holder.v_down_line.setVisibility(View.GONE);
}else{
holder.tv_trace_info.setText(tradeLists.get(position).getInfo());
holder.ll_trace_phone.setVisibility(View.GONE);
holder.tv_trace_time.setText(tradeLists.get(position).getTime());
holder.v_down_line.setVisibility(View.VISIBLE);
}
return convertView;
}
class Holder{
View v_up_line;
ImageView iv_state;
TextView tv_trace_info;
LinearLayout ll_trace_phone;
TextView tv_phone;
TextView tv_trace_time;
View v_down_line;
}
}
这样，我们的Adapter就已经适配完成，下面我们在Activity中实验一下。
（三）：Activity实验：
package com.bobo.trace;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.widget.ListView;
import com.bobo.adapters.TraceAdapter;
import com.bobo.beans.Trace;
public class MainActivity extends Activity {
private ListView lv_trace;
private ArrayList<Trace> tradeLists = new ArrayList<Trace>();
private TraceAdapter ta;
private Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = MainActivity.this;
initView();
}
private void initView(){
lv_trace = (ListView)findViewById(R.id.lv_trace);
initData();
ta = new TraceAdapter(tradeLists, context);
lv_trace.setAdapter(ta);
}
private void initData(){
tradeLists.add(new Trace(true, "商家已从广东发货", "15253157943", "2016-03-16 13:30:43"));
tradeLists.add(new Trace(false, "货物正在配送", "", "2016-03-16 18:30:43"));
tradeLists.add(new Trace(false, "货物已到达天津转运中心", "", "2016-03-17 13:30:43"));
tradeLists.add(new Trace(false, "货品已到济南货运站", "", "2016-03-18 13:30:43"));
tradeLists.add(new Trace(false, "货物已送达济南高新区站点", "", "2016-03-19 13:30:43"));
}
}
这样运行之后，我们就会发现，ListView的selector宽度是占满全屏的，这样，我们就需要编写一个inset来调整ListView的selector。
trace_divider.xml:
<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:insetLeft="50dp"
android:drawable="@color/mgrey">
</inset>
这样，我们的物流追踪界面就算是完成了，很简单。
