Android 时间轴效果

效果图:

device-2018-04-17-155924.png

code:

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private TimelineAdapter timelineAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);

        List<TimeLineEntity> timeLineEntities = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            TimeLineEntity timeLineEntity = new TimeLineEntity("step" + i, new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(System.currentTimeMillis()), i > 5 ? false : true);
            timeLineEntities.add(timeLineEntity);
        }

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(linearLayoutManager);
        linearLayoutManager.setOrientation(OrientationHelper.VERTICAL);
        timelineAdapter = new TimelineAdapter(timeLineEntities);
        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        recyclerView.setAdapter(timelineAdapter);
    }
}

public class TimelineAdapter extends RecyclerView.Adapter<TimelineAdapter.Holder> {

    private Context mContext;
    private List<TimeLineEntity> lineEntityList;

    public TimelineAdapter(List<TimeLineEntity> lineEntityList) {
        this.lineEntityList = lineEntityList;
    }

    @Override
    public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
        mContext = parent.getContext();
        View view = LayoutInflater.from(mContext).inflate(R.layout.timeline_item, parent, false);
        Holder holder = new Holder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(Holder holder, int position) {
        TimeLineEntity timeLineEntity = lineEntityList.get(position);
        holder.tv_title.setText(timeLineEntity.getTitle());
        holder.tv_title.setCompoundDrawablesWithIntrinsicBounds(timeLineEntity.isCompleted() ? mContext.getResources().getDrawable(R.drawable.ic_completed) :
                mContext.getResources().getDrawable(R.drawable.ic_uncompleted), null, null, null);
        holder.tv_desc.setText(timeLineEntity.getDesc());
        holder.top_line.setVisibility(position == 0 ? View.INVISIBLE : View.VISIBLE);
        holder.bottom_line.setVisibility(position == lineEntityList.size() - 1 ? View.INVISIBLE : View.VISIBLE);
    }

    @Override
    public int getItemCount() {
        return lineEntityList.size();
    }

    class Holder extends RecyclerView.ViewHolder {
        TextView tv_title;
        TextView tv_desc;
        View top_line;
        View bottom_line;

        public Holder(View itemView) {
            super(itemView);
            tv_title = (TextView) itemView.findViewById(R.id.tv_title);
            tv_desc = (TextView) itemView.findViewById(R.id.tv_desc);
            top_line = (View) itemView.findViewById(R.id.top_line);
            bottom_line = (View) itemView.findViewById(R.id.bottom_line);
        }
    }
}

public class TimeLineEntity {
    private String title;
    private String desc;
    private boolean isCompleted;

    public TimeLineEntity(String title, String desc, boolean isCompleted) {
        this.title = title;
        this.desc = desc;
        this.isCompleted = isCompleted;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public boolean isCompleted() {
        return isCompleted;
    }
    public void setCompleted(boolean completed) {
        isCompleted = completed;
    }
}

timeline_item

<?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="wrap_content"
    android:layout_marginLeft="10dp">

    <View
        android:id="@+id/top_line"
        android:layout_width="2dp"
        android:layout_height="40dp"
        android:layout_marginLeft="15dp"
        android:background="@android:color/darker_gray" />

    <View
        android:id="@+id/bottom_line"
        android:layout_width="2dp"
        android:layout_height="40dp"
        android:layout_below="@+id/top_line"
        android:layout_marginLeft="15dp"
        android:background="@android:color/darker_gray" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@android:color/white"
            android:drawableLeft="@drawable/ic_completed"
            android:drawablePadding="10dp"
            android:gravity="center_vertical"
            android:text="  2018/4/17 15:12"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tv_desc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="desc" />

    </LinearLayout>


</RelativeLayout>

activity_main

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />


</android.support.constraint.ConstraintLayout>