ListView+CheckBox實現單選效果

前言

上次寫了ListView+CheckBox實現全選效果,而沒有實現單選效果,這次添上.這篇沒有講解,因爲在上一篇中講解很詳細,不懂得可以去參考下.老規矩,還是先上圖.

點擊確定按鈕後打印的值:

頁面佈局

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

    <include layout="@layout/head_layout"></include>

    <ListView
        android:id="@+id/lv_check"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

    </ListView>

    <Button
        android:id="@+id/bt_confirm"
        android:textColor="@color/white"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="確定"
        android:textSize="18sp"
        android:background="@color/colorPrimary"/>

</LinearLayout>

Activity類

package com.listenergao.mytest.activity;

import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ListView;

import com.listenergao.mytest.R;
import com.listenergao.mytest.data.TestCheckOneAdapter;
import com.listenergao.mytest.requestBean.TestCheckBean;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

/**
 * Created by ListenerGao on 2016/9/12.
 * <p/>
 * ListView實現單選
 */
public class TestCheckOne extends BaseActivity implements AdapterView.OnItemClickListener {
    private static final String TAG = "TestCheckOne";
    @BindView(R.id.ib_arrow_left)
    ImageButton ibArrowLeft;
    @BindView(R.id.bt_confirm)
    Button btConfirm;
    @BindView(R.id.lv_check)
    ListView lvCheck;

    private List<TestCheckBean> mData;
    private TestCheckOneAdapter mAdapter;

    @Override
    protected int getLayoutResId() {
        return R.layout.activity_test_checkone;
    }

    @Override
    protected void initView() {
        ButterKnife.bind(this);

        ibArrowLeft.setVisibility(View.VISIBLE);
    }

    @Override
    protected void initData() {
        //初始化數據
        mData = new ArrayList<>();
        for (int i = 0; i < 150; i++) {
            TestCheckBean testCheckBean = new TestCheckBean(i, "張三" + i);
            mData.add(testCheckBean);
        }
        mAdapter = new TestCheckOneAdapter(this, mData);
        lvCheck.setAdapter(mAdapter);

        lvCheck.setOnItemClickListener(this);

    }

    @OnClick({R.id.ib_arrow_left, R.id.bt_confirm})
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.ib_arrow_left:
                finish();
                break;
            case R.id.bt_confirm:
                //根據得到的位置,獲取選中item的數據Bean
                int selectPosition = mAdapter.getSelectPosition();
                TestCheckBean checkBean = mData.get(selectPosition);
                Log.d(TAG, checkBean.toString());
                break;
        }
    }

    //設置ListView的點擊事件,實現CheckBox聯動效果.
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        TestCheckOneAdapter.ViewHolder holder = (TestCheckOneAdapter.ViewHolder) view.getTag();
        holder.checkBox.toggle();
    }
}

Adapter類

package com.listenergao.mytest.data;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;

import com.listenergao.mytest.R;
import com.listenergao.mytest.requestBean.TestCheckBean;

import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * Created by ListenerGao on 2016/9/12.
 */
public class TestCheckOneAdapter extends BaseAdapter {
    private static final String TAG = "TestCheckOneAdapter";
    private Activity mActivity;
    private List<TestCheckBean> mData;

    private int tempPosition = -1;  //記錄已經點擊的CheckBox的位置

    public TestCheckOneAdapter(Activity context, List<TestCheckBean> data) {
        this.mActivity = context;
        this.mData = data;
    }

    @Override
    public int getCount() {
        return mData.size() > 0 ? mData.size() : 0;
    }

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(mActivity).inflate(R.layout.item_test_checkall, null);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.tvName.setText(mData.get(position).getName());
        holder.checkBox.setId(position);    //設置當前position爲CheckBox的id
        holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    if (tempPosition != -1) {
                        //根據id找到上次點擊的CheckBox,將它設置爲false.
                        CheckBox tempCheckBox = (CheckBox) mActivity.findViewById(tempPosition);
                        if (tempCheckBox != null) {
                            tempCheckBox.setChecked(false);
                        }
                    }
                    //保存當前選中CheckBox的id值
                    tempPosition = buttonView.getId();

                } else {    //當CheckBox被選中,又被取消時,將tempPosition重新初始化.
                    tempPosition = -1;
                }
            }
        });
        if (position == tempPosition)   //比較位置是否一樣,一樣就設置爲選中,否則就設置爲未選中.
            holder.checkBox.setChecked(true);
        else holder.checkBox.setChecked(false);
        return convertView;
    }

    //返回當前CheckBox選中的位置,便於獲取值.
    public int getSelectPosition() {
        return tempPosition;
    }

    public static class ViewHolder {
        @BindView(R.id.tv_name)
        public TextView tvName;
        @BindView(R.id.cb_check)
        public CheckBox checkBox;

        public ViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }
}

源碼地址:
https://github.com/ListenerGao/MyTest/blob/master/app/src/main/java/com/listenergao/mytest/activity/TestCheckOne.java