【移动应用开发技术】Android中怎么自定义一个指示器时间轴效果

【移动应用开发技术】Android中怎么自定义一个指示器时间轴效果

本篇文章为大家展示了Android中怎么自定义一个指示器时间轴效果，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。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时间的文本对齐，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="/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：StepViewBeanpublic

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

=