CheckBox与ListView结合使用

实现效果: 长按LitsView的item时, CheckBox显示,CheckBox可选中,在这个效果当中可能会有CheckBox被选中时出现混乱的情况,在此记录一下这个解决办法.

先做准备工作: 一个listview 的item行布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
<TextView
android:layout_margin="10dp"
android:id="@+id/tv_item_list_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:layout_margin="10dp"
android:layout_toRightOf="@id/tv_item_list_name"
android:id="@+id/tv_item_list_age"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<CheckBox
android:layout_alignParentRight="true"
android:layout_margin="10dp"
android:visibility="gone"
android:id="@+id/ckb_item_list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>

listview的adapter

                                                                                                                                        package com.limiao.checkbox;     
import android.content.Context;
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 java.util.List;
import java.util.zip.Inflater;

/**
 * Created by limiao on 16/11/24.
 */

public class MyAdapter extends BaseAdapter {
private List<Person> mPersons;
private Context mContext;
private boolean mVisibility = false;// checkbox是否显示,默认不显示
public MyAdapter(Context context) {
mContext = context;
notifyDataSetChanged();
}

public void setVisibility(boolean visibility) {
mVisibility = visibility;
notifyDataSetChanged();
}

public void setPersons(List<Person> persons) {
mPersons = persons;
notifyDataSetChanged();
}

@Override
public int getCount() {
return mPersons == null ? 0 : mPersons.size();
}

@Override
public Object getItem(int position) {
return mPersons.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) {
    convertView = LayoutInflater.from(mContext).inflate(R.layout.item_list, parent, false);
    holder = new ViewHolder(convertView);
    convertView.setTag(holder);
} else {
    holder = (ViewHolder) convertView.getTag();
}
Person person = mPersons.get(position);
holder.mNameTv.setText(person.getName());
holder.mAgeTv.setText(person.getAge());
if (mVisibility) {
    holder.mCheckBox.setVisibility(View.VISIBLE);
    final ViewHolder finalHolder = holder;

    /**
     * 此处要用setOnClickListener,而不是setOnCheckedChangeListener()
     * 否则会出现混乱的情况
     */

    holder.mCheckBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            CheckBox checkBox = (CheckBox) v;
            finalHolder.mCheckBox.setChecked(checkBox.isChecked());
        }
    });
}
return convertView;
}

private static class ViewHolder {
private TextView mNameTv;
private TextView mAgeTv;
private CheckBox mCheckBox;

public ViewHolder(View view) {
    mNameTv = (TextView) view.findViewById(R.id.tv_item_list_name);
    mAgeTv = (TextView) view.findViewById(R.id.tv_item_list_age);
    mCheckBox = (CheckBox) view.findViewById(R.id.ckb_item_list);
}

}

在为CheckBox设置选中状态时,这里需要用setOnClickListener(),才不会出现混乱,如果用setOnCheckedChangeListener()就会出现以下的情况

CheckBox的选中状态出现混乱
3. 一个很简单的实体类

    package com.limiao.checkbox;
    /**
     * Created by limiao on 16/11/23.
     */

    public class Person  {
    String  name ;
    String age;

    public Person(String name, String age) {
    this.name = name;
    this.age = age;
    }

    public String getName() {
    return name;
    }

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

    public String getAge() {
    return age;
    }

    public void setAge(String age) {
    this.age = age;
    }
    }

4. 最后是MainActivity

    package com.limiao.checkbox;

    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.ListView;

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

    public class MainActivity extends AppCompatActivity {
    private ListView mListView;
    private MyAdapter mMyAdapter;
    private List<Person> mPersons;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mListView = (ListView) findViewById(R.id.lv_aty_main);
    mPersons = new ArrayList<>();
    for (int i = 0; i < 90; i++) {
        Person person = new Person("aaa","34");
        mPersons.add(person);
    }
    mMyAdapter = new MyAdapter(this);
    mMyAdapter.setPersons(mPersons);
    mListView.setAdapter(mMyAdapter);
    mListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
            mMyAdapter.setVisibility(true);
            return false;
        }
    });
    }
    }

demo的完整的下载地址

CheckBox与ListView结合使用

实现效果: 长按LitsView的item时, CheckBox显示,CheckBox可选中,在这个效果当中可能会有CheckBox被选中时出现混乱的情况,在此记录一下这个解决办法.

猜你喜欢