概要

需求：要实现类似于PC硬件检测工具，顺序的对每个硬件进行检查，check没问题就是绿色的√，失败则是红色的×，并显示具体出错的原因。效果如下：

image

实现原理

1.首先是AndroidManifest.xml配置如下：

<?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=".ui.CheckListAcvitity">

        android:id="@+id/list_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent"/>

</android.support.constraint.ConstraintLayout>

2.ListView的每个Item的布局xml文件：

<?xml version="1.0" encoding="utf-8"?>
<android.widget.LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:paddingTop="8dp"
    android:paddingBottom="8dp"
    android:orientation="vertical"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/check_tiem_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:textSize="18dp"
            android:text="TextView" />

        <ProgressBar
            android:id="@+id/loading"
            style="?android:attr/progressBarStyle"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:visibility="gone"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true" />

        <ImageView
            android:id="@+id/error"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:visibility="gone"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true"
            android:src="@drawable/error" />

        <ImageView
            android:id="@+id/pass"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_marginRight="10dp"
            android:visibility="gone"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true"
            android:src="@drawable/pass"/>

    </RelativeLayout>

    <TextView
        android:id="@+id/desc"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:visibility="gone"
        android:text="desc"
        android:textColor="@color/warn"
        android:padding="10dp"/>

</android.widget.LinearLayout>

3.创建每个检测项的数据Bean类

public class ListItemBean {
    private String name;
    private int status;
    private String desc;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getDesc() {
        return desc;
    }

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

4.在adapter容器中根据Bean的status字段来更新view的显示和隐藏

public View getView(int position, View convertView, ViewGroup parent) {
        CheckItemBase checkItemBase = (CheckItemBase)getItem(position);
        View view = LayoutInflater.from(getContext()).inflate(R.layout.check_list_item, null);

        TextView name = view.findViewById(R.id.check_tiem_name);
        ProgressBar loadingView = view.findViewById(R.id.loading);
        ImageView passView = view.findViewById(R.id.pass);
        ImageView errorView = view.findViewById(R.id.error);
        TextView descView = view.findViewById(R.id.desc);

        name.setText(checkItemBase.getName());
        switch (checkItemBase.getStatus()) {
            case CheckItemBase.WAIT:
                loadingView.setVisibility(View.GONE);
                passView.setVisibility(View.GONE);
                errorView.setVisibility(View.GONE);
                break;
            case CheckItemBase.LOADING:
                loadingView.setVisibility(View.VISIBLE);
                passView.setVisibility(View.GONE);
                errorView.setVisibility(View.GONE);
                break;
            case CheckItemBase.PASSED:
                loadingView.setVisibility(View.GONE);
                passView.setVisibility(View.VISIBLE);
                errorView.setVisibility(View.GONE);
                break;
            case CheckItemBase.ERROR:
                loadingView.setVisibility(View.GONE);
                passView.setVisibility(View.GONE);
                errorView.setVisibility(View.VISIBLE);
                break;
        }

        String desc = checkItemBase.getDesc();
        if(desc != null && !desc.isEmpty()){
            descView.setText(desc);
            descView.setVisibility(View.VISIBLE);
        }

        return view;
    }

5.初始化ListView和adpater，以及Thread

mListView = findViewById(R.id.list_view);
List<ListItemBean> listData = null;//数据源可以根据业务需要来赋值
ArrayAdapter adapter = new CheckListAdapter(this,R.id.list_view,listData);
mListView.setAdapter(adapter);
mCheckThread = new CheckThread(listData.size(),adapter,CheckListAcvitity.this);
mCheckThread.start();

6.CheckThread里面来控制check流程

public void run() {
        CriticalTool.initData();
        for(int i = 0;i < mCheckNum;i++){
            ListItemBean checkItem = (ListItemBean) mAdapter.getItem(i);
            checkItem.setStatus(ListItemBean.LOADING);
            Util.updateList(mAdapter,mActivity);//更新ListView显示
            boolean result = checkItem.check();//这里是一些check等耗时操作

            if(result){
                checkItem.setStatus(CheckItemBase.PASSED);
            }else{
                checkItem.setStatus(CheckItemBase.ERROR);
            }

            Util.updateList(mAdapter,mActivity);//耗时操作完成，状态改变，这里再次更新ListView
        }
    }

小结

 总的来说，其实ListView的玩法很多，基于adapter的数据适配，以及自定义布局item，可以根据业务要求做出各种想过。当然，如果觉得ListView不满足业务需求，也可以重写ListView，比如类似于通讯录，这个可以通过重写ListView来实现。
 以上如果有错误，欢迎讨论。