listView中包含checkBox或button。获取checkbox的单选或button的点击事件的解决办法

本文介绍了一种在Android应用中实现ListView与CheckBox联动的方法。通过自定义Adapter并使用ViewHolder模式来提高性能,实现了当一个CheckBox被选中时,之前选中的CheckBox会自动取消选中状态。此外,还介绍了如何在Activity中监听ListView的点击事件。

1、listview含checkBox(联动)
布局文件:
<《》?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=”55dp”
android:orientation=”horizontal”
android:descendantFocusability=”blocksDescendants”>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="55dp">

    <TextView
        android:id="@+id/tv_wifi_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:textSize="16sp"
        android:textColor="#333"
        android:paddingLeft="15dp" />
    <TextView
        android:id="@+id/tv_bssid"
        android:visibility="gone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <CheckBox
        android:id="@+id/cb_wifi"
        android:layout_width="16dp"
        android:layout_height="16dp"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="15dp"
        android:background="@drawable/checkbox_change"
        android:button="@null"
        android:checked="false" />
</RelativeLayout>

adapter代码:

package com.tg.wisdommanagement.adapter;

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.tg.wisdommanagement.R;
import com.tg.wisdommanagement.info.WiFiDetail;

import java.util.List;

/**
* 搜索到的WiFi列表
* Created by prince70 on 2018/3/28.
*/

public class WifiListAdapter extends BaseAdapter {
private Activity mActivity;
private List mDatas;
private int tempPosition = -1; //记录已经点击的CheckBox的位置

public WifiListAdapter(Activity mContext, List<WiFiDetail> mDatas) {
    this.mActivity = mContext;
    this.mDatas = mDatas;
}

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

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

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = LayoutInflater.from(mActivity).inflate(R.layout.list_wifi_item, null);
        holder.SSID= (TextView) convertView.findViewById(R.id.tv_wifi_name);
        holder.BSSID=(TextView)convertView.findViewById(R.id.tv_bssid);
        holder.checkBox= (CheckBox) convertView.findViewById(R.id.cb_wifi);
        convertView.setTag(holder);
    }else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.SSID.setText(mDatas.get(position).getSSID());
    holder.BSSID.setText(mDatas.get(position).getBSSID());

    holder.checkBox.setId(position);    //设置当前position为CheckBox的id
    holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) {
                if (tempPosition != -1) {
                    //根据id找到上次点击的CheckBox,将它设置为false.
                    CheckBox tempCheckBox = (CheckBox) mActivity.findViewById(tempPosition);
                    if (tempCheckBox != null) {
                        tempCheckBox.setChecked(false);
                    }
                }
                //保存当前选中CheckBox的id值
                tempPosition = buttonView.getId();

            } else {    //当CheckBox被选中,又被取消时,将tempPosition重新初始化.
                tempPosition = -1;
            }
        }
    });
    if (position == tempPosition)   //比较位置是否一样,一样就设置为选中,否则就设置为未选中.
        holder.checkBox.setChecked(true);
    else holder.checkBox.setChecked(false);
    return convertView;
}


//返回当前CheckBox选中的位置,便于获取值.
public int getSelectPosition() {
    return tempPosition;
}

public static class ViewHolder {
    public TextView SSID;
    public TextView BSSID;
    public CheckBox checkBox;
}

}

activity代码:
package com.tg.wisdommanagement;

import android.graphics.Color;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import com.tg.wisdommanagement.adapter.WifiListAdapter;
import com.tg.wisdommanagement.base.BaseActivity;
import com.tg.wisdommanagement.info.WiFiDetail;
import com.tg.wisdommanagement.view.ActivityHeaderView;
import com.tg.wisdommanagement.view.dialog.ToastFactory;

import org.litepal.crud.DataSupport;

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

/**设置考勤WiFi
* Created by prince70 on 2018/4/3.
*/

public class SettingWiFiActivity extends BaseActivity implements AdapterView.OnItemClickListener {
private static final String TAG = “SettingWiFiActivity”;
private ActivityHeaderView header_setting_wifi;

private List<WiFiDetail> wiFiDetails = new ArrayList<>();
private WifiListAdapter adapter;

private ListView lv_wifi;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_setting_wifi);
    initView();
    getWifiList();
}

private void initView() {
    header_setting_wifi = (ActivityHeaderView) findViewById(R.id.header_setting_wifi);
    header_setting_wifi.setTitle("设置考勤Wi-Fi");
    header_setting_wifi.setRightText("保存");
    header_setting_wifi.setRightTextColor(Color.WHITE);
    header_setting_wifi.setListenerRight(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int selectPosition = adapter.getSelectPosition();
            WiFiDetail wiFiDetail = wiFiDetails.get(selectPosition);
            if (wiFiDetail == null) {
                ToastFactory.showToast(SettingWiFiActivity.this, "您还未选择任何WiFi");
            } else {

// ToastFactory.showToast(SettingWiFiActivity.this, wiFiDetail.getSSID() + “\n” + wiFiDetail.getBSSID());
// SharedPreferencesTools.saveSysMap(SettingWiFiActivity.this, “wifiSSID”, wiFiDetail.getSSID());
// SharedPreferencesTools.saveSysMap(SettingWiFiActivity.this, “wifiBSSID”, wiFiDetail.getBSSID());
DataSupport.deleteAll(WiFiDetail.class, “SSID = ?”, wiFiDetail.getSSID());
wiFiDetail = new WiFiDetail(wiFiDetail.getSSID(), wiFiDetail.getBSSID());
wiFiDetail.save();
List all = DataSupport.findAll(WiFiDetail.class);
Log.e(TAG, “onClick: ” + all.toString());
finish();
}
}
});
lv_wifi = (ListView) findViewById(R.id.lv_wifi);
}

@Override
public View getContentView() {
    return null;
}

@Override
public String getHeadTitle() {
    return null;
}

//设置ListView的点击事件,实现CheckBox联动效果.
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    WifiListAdapter.ViewHolder holder = (WifiListAdapter.ViewHolder) view.getTag();
    holder.checkBox.toggle();

}


private void getWifiList() {
    Log.e(TAG, "getWifiList: ");
    WifiManager wm = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);

// 获取当前所连接wifi的信息
if (wm != null) {
WifiInfo wi = wm.getConnectionInfo();
Log.e(TAG, “onCreate: ” + wi.getSSID());
Log.e(TAG, “onCreate: ” + wi.getBSSID());
// Log.e(TAG, “onCreate: ” + wi.getMacAddress());
List scanResults = wm.getScanResults();
for (ScanResult result : scanResults) {
Log.e(TAG, “onCreate:SSID ” + result.SSID);
Log.e(TAG, “onCreate: BSSID” + result.BSSID);
wiFiDetails.add(new WiFiDetail(result.SSID, result.BSSID));
adapter = new WifiListAdapter(this, wiFiDetails);
lv_wifi.setAdapter(adapter);
lv_wifi.setOnItemClickListener(this);
}
}
// 获取扫描到的所有wifi信息
}
}

2、listeview含button(回调)
布局文件:

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