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Android自定义指示器时间轴效果实例代码详解

指示器时间轴在外卖、购物类的APP里会经常用到,效果大概就像下面这样,看了网上很多文章,大都是自己绘制,太麻烦,其实通过ListView就可以实现。

在Activity关联的布局文件activity_main.xml中放置一个ListView,代码如下。由于这个列表只是用于展示信息,并不需要用户去点击,所以将其clickable属性置为false;为了消除ListView点击产生的波纹效果,我们设置其listSelector属性的值为透明;我们不需要列表项之间的分割线,所以设置其divider属性的值为null。

activity_main

<ListView
  android:id="@+id/lvTrace"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:clickable="false"
  android:divider="@null"
  android:dividerHeight="0dp"  android:listSelector="@android:color/transparent" />

每个列表项的布局stepview_adapter.xml,代码如下。由于时间轴的点和线都位于item布局中,为了使线是连续的,所以设置上面ListView的dividerHeight属性值为0dp,即垂直方向每个列表项都是紧挨着的。在item的布局中,我们先使用LinearLayout将布局分成左右两个部分,左边就是时间轴的布局,右边是内容的布局。

内容的布局,物流信息是一个RelativeLayout,为了不使两个列表项的文本靠得太近,在RelativeLayout中设置其paddingBottom和paddingTop属性

时间轴的布局,时间轴的布局也是一个RelativeLayout,为了使时间轴的圆点和显示间的文本对齐,我们需要在圆点之上再放置一条竖线,所以整体的布局就是 线 - 点 - 线。为了让线可以正好对准圆点的中心,我们让线和点都水平居中,即android:layout_centerHorizontal="true"

stepview_adapter

<?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="match_parent"
  android:gravity="center"
  android:orientation="horizontal">
  <RelativeLayout
    android:id="@+id/rlTimeline"
    android:layout_width="wrap_content"
    android:layout_marginLeft="15dp"
    android:layout_height="match_parent">
    <TextView
      android:id="@+id/tvTopLine"
      android:layout_width="1.2dp"
      android:layout_height="12dp"
      android:layout_centerHorizontal="true"
      android:background="#999" />
    <TextView
      android:id="@+id/tvDot"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/tvTopLine"
      android:layout_centerHorizontal="true"
      android:background="@drawable/state_get_huankuan" />
    <TextView
      android:layout_width="1.2dp"
      android:id="@+id/tvLine"
      android:layout_height="match_parent"
      android:layout_below="@id/tvDot"
      android:layout_centerHorizontal="true"
      android:background="#999" />
  </RelativeLayout>
  <RelativeLayout
    android:id="@+id/rlCenter"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="6dp"
    android:paddingRight="10dp"
    android:layout_marginLeft="20dp"
    android:paddingTop="12dp">
    <TextView
      android:id="@+id/step_tv_time"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentRight="true"
      android:layout_marginRight="6dp"
      android:text="10-20 22:22"
      android:textColor="#cccccc"
      android:textSize="12sp" />
    <TextView
      android:id="@+id/step_tv_des"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_marginRight="15dp"
      android:textStyle="bold"
      android:layout_toLeftOf="@+id/step_tv_time"
      android:text="fffffff" />
    <TextView
      android:id="@+id/step_tv_des_below"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true"
      android:layout_below="@+id/step_tv_des"
      android:layout_marginTop="5dp"
      android:text=""
      android:textColor="#999999" />
  </RelativeLayout>
</LinearLayout><br><br><br>

定义一个Adapter,代码如下。由于第一行的物流信息的显示形式和其他的不一样,所以要注意第一行的item的时间轴布局中最上面的线不显示

public class StepViewAdapter extends BaseAdapter {
  private Context context;
  private List<StepViewBean> traceList = new ArrayList<>();
  private static final int TYPE_FINISH = 101;
  private static final int TYPE_UNFINISH = 102;
  private static final int TYPE_ERROR = 103;
  public StepViewAdapter(Context context,List<StepViewBean> traceList) {
    this.context = context;
    this.traceList = traceList;
  }
  @Override
  public int getCount() {
    return traceList.size();
  }
  @Override
  public StepViewBean getItem(int position) {
    return traceList.get(position);
  }
  @Override
  public long getItemId(int position) {
    return position;
  }
  @Override
  public View getView(int position,View convertView,ViewGroup parent) {
    ViewHolder holder;
    final StepViewBean trace = getItem(position);
    if (convertView != null) {
      holder = (ViewHolder) convertView.getTag();
    } else {
      holder = new ViewHolder();
      convertView = LayoutInflater.from(context).inflate(R.layout.stepview_adapter,parent,false);
      holder.tvTopLine = (TextView) convertView.findViewById(R.id.tvTopLine);
      holder.tvDot = (TextView) convertView.findViewById(R.id.tvDot);
      holder.tvLine = (TextView) convertView.findViewById(R.id.tvLine);
      holder.tvAcceptStation = (TextView) convertView.findViewById(R.id.step_tv_des);
      holder.tvAcceptTime = (TextView) convertView.findViewById(R.id.step_tv_time);
      holder.tvAcceptStationBelow = (TextView) convertView.findViewById(R.id.step_tv_des_below);
      holder.rlTimeline = (RelativeLayout) convertView.findViewById(rlTimeline);
      convertView.setTag(holder);
    }
    if (position == 0) {
      holder.tvTopLine.setVisibility(View.INVISIBLE);
    }
    if (position == traceList.size() - 1) {
      holder.tvLine.setVisibility(View.GONE);
    } else {
      holder.tvLine.setVisibility(View.VISIBLE);
    }
    switch (getItemViewType(position)) {
      case TYPE_FINISH:
        holder.tvAcceptStation.setTextColor(context.getResources().getColor(R.color.crt_completed));
        holder.tvDot.setBackgroundResource(R.drawable.state_get_huankuan);
        holder.tvLine.setBackgroundColor(context.getResources().getColor(R.color.crt_completed));
        holder.tvTopLine.setBackgroundColor(context.getResources().getColor(R.color.crt_completed));
        break;
      case TYPE_UNFINISH:
        holder.tvAcceptStation.setTextColor(context.getResources().getColor(R.color.crt_uncompleted_text));
        holder.tvDot.setBackgroundResource(R.drawable.state_normal_huankuan);
        holder.tvLine.setBackgroundColor(context.getResources().getColor(R.color.crt_text_hint_color));
        break;
      case TYPE_ERROR:
        holder.tvTopLine.setVisibility(View.VISIBLE);
        holder.tvAcceptStation.setTextColor(context.getResources().getColor(R.color.crt_error_text));
        holder.tvDot.setBackgroundResource(R.drawable.state_lose_huankuan);
        break;
    }
    holder.tvAcceptTime.setText(trace.getAcceptTime());
    holder.tvAcceptStation.setText(trace.getAcceptStation());
    if (!TextUtils.isEmpty(trace.getAcceptStation())) {
      holder.tvAcceptStationBelow.setText(trace.getAcceptStationBelow());
    }
    return convertView;
  }
  @Override
  public int getItemViewType(int id) {
     if(id==(traceList.size()-2)){
       return TYPE_ERROR;
     }
     if(id==(traceList.size()-1)){
       return TYPE_UNFINISH;
     }
     return TYPE_FINISH;
  }
  static class ViewHolder {
    public TextView tvAcceptTime,tvAcceptStation,tvLine,tvAcceptStationBelow;
    public TextView tvTopLine,tvDot;
    public RelativeLayout rlTimeline;
  }
}

为了可以看到布局的效果,在Activity中模拟一些假数据。需要定义一个实体类Trace,它有两个属性,acceptTime和acceptStation,代码如下:

StepViewBean

public class StepViewBean {
  /** 时间 */
  private String acceptTime;
  /** 描述 */
  private String acceptStation;
  /** 描述下方*/
  private String acceptStationBelow;
  public String getAcceptStationBelow() {
    return acceptStationBelow;
  }
  public void setAcceptStationBelow(String acceptStationBelow) {
    this.acceptStationBelow = acceptStationBelow;
  }
  public StepViewBean() {
  }
  public StepViewBean(String acceptTime,String acceptStation) {
    this.acceptTime = acceptTime;
    this.acceptStation = acceptStation;
  }
  public StepViewBean(String acceptTime,String acceptStation,String acceptStationBelow) {
    this.acceptTime = acceptTime;
    this.acceptStation = acceptStation;
    this.acceptStationBelow = acceptStationBelow;
  }
  public String getAcceptTime() {
    return acceptTime;
  }
  public void setAcceptTime(String acceptTime) {
    this.acceptTime = acceptTime;
  }
  public String getAcceptStation() {
    return acceptStation;
  }
  public void setAcceptStation(String acceptStation) {
    this.acceptStation = acceptStation;
  }
} 

MainActivity 

public class MainActivity extends AppCompatActivity {
  private List<StepViewBean> traceList = new ArrayList<>();
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ListView lvTrace= (ListView) findViewById(R.id.lvTrace);
    traceList.add(new StepViewBean("10-20 22: 22","您的订单已打印完毕","招商银行(9979) 小明\n支付金额  100000"));
    traceList.add(new StepViewBean("10-20 22:22","您已提交定单,等待系统确认"));
    traceList.add(new StepViewBean("10-20 22:24","您的订单已拣货完成"));
    traceList.add(new StepViewBean("10-20 22:24","扫描员已经扫描"));
    traceList.add(new StepViewBean("10-20 22:24","感谢你在京东购物,欢迎你下次光临!"));
    StepViewAdapter adapter = new StepViewAdapter(this,traceList);
    lvTrace.setAdapter(adapter);
  }
}

 GitHub地址:https://github.com/peiniwan/StepView

总结

以上所述是小编给大家介绍的Android自定义指示器时间轴效果实例代码详解,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持

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