ListView中的Item内的选中状态的实现

   在项目中遇到了一个功能，就是选中listview中的任意一个item，其他的是未被选中状态。或者是多个item被同时勾选中。根据被选中的item计算金额的总和。如下图所示：
   (https://img-blog.csdn.net/20151215110800371)
   下面给出源码：

activity的布局immediaterepayment.xml：

<?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:background="#f7f7f7"
    android:orientation="vertical" >

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

        <ListView
            android:id="@+id/listview"
            android:layout_width="match_parent"
            android:layout_height="fill_parent" 
            android:layout_marginBottom="50dp">
        </ListView>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_alignParentBottom="true"
            android:orientation="vertical" >

            <View
                android:layout_width="fill_parent"
                android:layout_height="1dp"
                android:background="#dadada" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="fill_parent"
                android:orientation="horizontal" >

                <TextView
                    android:id="@+id/all"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="2.5"
                    android:gravity="center_vertical"
                    android:paddingLeft="15dp"
                    android:textSize="19sp"
                    android:textColor="#666666"
                    android:text="总计:6333元" />

                <TextView
                    android:id="@+id/huankuan"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1.5"
                    android:background="#3a8dee"
                    android:gravity="center"
                    android:text="立即还款"
                    android:textSize="19sp"
                    android:textColor="@android:color/white" />
            </LinearLayout>
        </LinearLayout>
    </RelativeLayout>

</LinearLayout>

适配器的布局文件immediaterepaymentadapter.xml：

<?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:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/image"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_gravity="center_vertical"
            android:layout_margin="5dp"
            android:src="@drawable/gou_no" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_margin="3dp"
            android:orientation="vertical" >

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="5dp"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:layout_marginTop="8dp" >

                <TextView
                    android:id="@+id/money"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="left"
                    android:text="333元"
                    android:textColor="#ed4a18"
                    android:textSize="19sp" />

                <TextView
                    android:id="@+id/time"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_gravity="right"
                    android:gravity="right"
                    android:text="最迟还款：12月12日"
                    android:textColor="#999999"
                    android:textSize="15sp" />
            </RelativeLayout>

            <TextView
                android:id="@+id/content"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:layout_marginBottom="5dp"
                android:gravity="left"
                android:text="开店分期付款第2期还款"
                android:textColor="#666666"
                android:textSize="16sp" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

activity的Java代码ImmediateRepayment：

public class ImmediateRepayment extends Activity implements OnClickListener {

    private ImmediateRepaymentAdapter adapter;
    private ArrayList<HashMap<String, Object>> arrayList = new ArrayList<>();
    private ListView listView;
    private TextView all, huankuan;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.immediaterepayment);
        loginMap = Internet.getLoginData(this);
        init();
    }

    private void init() {
        findId();
        setText();
        setAdapter();
        addData();
        setListener();
    }

    private void setText() {
        Spanned spanned = Html.fromHtml("总计:"
                + "<font color=#ed4a18 >0元</font>");
        all.setText(spanned);
    }

    private void addData() {
        for (int i = 0; i < 5; i++) {
            HashMap<String, Object> map = new HashMap<>();
            map.put("money", 444);
            map.put("date", "最迟还款：12月12日");
            map.put("text", "开店分期付款第2期还款");
            map.put("view", "0");
            arrayList.add(map);
        }
    }

    private void setAdapter() {
        adapter = new ImmediateRepaymentAdapter(ImmediateRepayment.this,
                arrayList);
        listView.setAdapter(adapter);
    }

    private void setListener() {
        back.setOnClickListener(this);
        huankuan.setOnClickListener(this);
        listView.setOnItemClickListener(listener);
    }

    private void findId() {
        back = (ImageView) findViewById(R.id.back);
        listView = (ListView) findViewById(R.id.listview);
        all = (TextView) findViewById(R.id.all);
        huankuan = (TextView) findViewById(R.id.huankuan);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        // 立即还款
        case R.id.huankuan:

            break;

        }
    }

    OnItemClickListener listener = new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {

            for (int i = 0; i < arrayList.size(); i++) {
                if (position == i) {
                    arrayList.get(position).put("view", "1");
                } else {
                    arrayList.get(i).put("view", "0");
                }
            }

            int countMoney = 0;
            for (int i = 0; i < arrayList.size(); i++) {
                if (arrayList.get(i).get("view").toString().equals("1")) {
                    countMoney += Integer.parseInt(arrayList.get(i)
                            .get("money").toString());
                }
            }

            adapter.notifyDataSetChanged();
            Spanned spanned = Html.fromHtml("总计:" + "<font color=#ed4a18 >"
                    + countMoney + "元</font>");
            all.setText(spanned);

        }
    };
}

适配器的Java代码ImmediateRepaymentAdapter：

public class ImmediateRepaymentAdapter extends BaseAdapter {

    Context context;
    ArrayList<HashMap<String, Object>> arrayList;

    public ImmediateRepaymentAdapter(Context context,
            ArrayList<HashMap<String, Object>> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @Override
    public int getCount() {
        return arrayList.size();
    }

    @Override
    public Object getItem(int position) {
        return getItem(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
            convertView = LayoutInflater.from(context).inflate(
                    R.layout.immediaterepaymentadapter, null);
            TextView tv_money = (TextView) convertView.findViewById(R.id.money);
            TextView tv_time = (TextView) convertView.findViewById(R.id.time);
            TextView tv_content = (TextView) convertView
                    .findViewById(R.id.content);
            ImageView img = (ImageView) convertView.findViewById(R.id.image);
        tv_money.setText(arrayList.get(position).get("money").toString()+"元");
        tv_time.setText(arrayList.get(position).get("date").toString());
        tv_content.setText(arrayList.get(position).get("text").toString());
        if (arrayList.get(position).get("view").toString().equals("0")) 
        {
            img.setBackgroundResource(R.drawable.gou_no);
        }else 
        {
            img.setBackgroundResource(R.drawable.gou);
        }
        return convertView;
    }

}

   这样子就可以实现单个item被选中了。如果要实现多个item同时被选中，只需要将onItemClick中第一个for循环换成如下代码即可：

if (arrayList.get(position).get("view").toString().equals("0")) {
 arrayList.get(position).put("view", "1");
 } else {
 arrayList.get(position).put("view", "0");
 }

以上就是实现的全部代码了，个人技术有限，不喜勿喷哈！如有写的不对的地方，欢迎大家多给建议。