如何使用复选框获取所有选定的列表项 [英] How do I get all the selected list Items using Checkbox

问题描述

我对每个列表项都使用复选框，现在我想在按钮单击时获得所有选定列表项的名称。

I am using Checkbox with each and every list item, and now i would like to get name of all the selected list items on button click.

我也发布了 Adapter 和 Activity 类的代码，因为稍后我必须将选中的列表项显示到ListView的另一个活动中。

I have posted code of Adapter and Activity class as well, because later i have to show selected list items into another activity into ListView.

但是现在我只想单击按钮查看所有选中的列表项

But for now i just want to see all the selected list items on button click

适配器：

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // convert view = design
        ....................

        holder.tvName.setText(actorList.get(position).getName());           

        holder.checkBox.setOnCheckedChangeListener(null);

        holder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked){
                    // add into arraylist
                  selectedname.add(actorList.get(position).getName());
                }else{
                    // remove from arraylist
                    selectedname.remove(actorList.get(position).getName());
                }

            }
        });

        return v;

    }   

推荐答案

以下代码对我来说很好，所以您可以尝试

The below code working fine for me so you can try this

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/select_btn"
    android:text="Select"/>

<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/listview"/>

list_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="horizontal" >

<CheckBox
    android:id="@+id/cbBox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical" >
</CheckBox>

<TextView
    android:layout_height="wrap_content"
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_gravity="center_vertical"
    android:ellipsize="marquee" />

服务

import java.io.Serializable;
public class Service implements Serializable
{

private static final long serialVersionUID = 1L;

private String name;
private boolean selected;

public Service() {
    // TODO Auto-generated constructor stub
}

public Service(String name) {
    super();
    this.name = name;
}


public String getName() {
    return name;
}

public boolean isSelected() {
    return selected;
}

public void setSelected(boolean selected) {
    this.selected = selected;
}

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

}

}

ServiceAdapter

import android.content.Context;
import android.util.Log;
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 android.widget.Toast;
import java.util.ArrayList;
public class ServiceAdapter extends BaseAdapter {
ArrayList<Service> actorList;
LayoutInflater vi;
Context context;

public ServiceAdapter(Context context,ArrayList<Service> objects) {
    this.context= context;
    this.vi = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    this.actorList = objects;
}


@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // convert view = design
    final ViewHolder holder;
    if (convertView == null) {
        holder = new ViewHolder();
        convertView = vi.inflate(R.layout.list_row, null);

        holder.tvName = (TextView) convertView.findViewById(R.id.textView1);
        holder.checkBox = (CheckBox) convertView.findViewById(R.id.cbBox);

        convertView.setTag(holder);
    } else
        holder = (ViewHolder) convertView.getTag();

    holder.tvName.setText(actorList.get(position).getName());
    holder.checkBox.setChecked(actorList.get(position).isSelected());

    holder.checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            boolean isSelected = ((CheckBox)v).isChecked();
            actorList.get(position).setSelected(isSelected);
        }
    });

    return convertView;

}


static class ViewHolder {

    public TextView tvName;
    public CheckBox checkBox;

}


@Override
public int getCount() {
    // TODO Auto-generated method stub
    return actorList.size();
}


@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return actorList.get(position);
}


@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

public ArrayList<Service> getSelectActorList(){
    ArrayList<Service> list = new ArrayList<>();
    for(int i=0;i<actorList.size();i++){
        if(actorList.get(i).isSelected())
            list.add(actorList.get(i));
    }
    return list;
}

}

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final ListView listView = (ListView)findViewById(R.id.listview);
    listView.setAdapter(new ServiceAdapter(this,sampleData()));

    Button btn = (Button)findViewById(R.id.select_btn);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            ArrayList<Service> actorList = ((ServiceAdapter)listView.getAdapter()).getSelectActorList();
            Toast.makeText(MainActivity.this,""+actorList.size(),Toast.LENGTH_LONG).show();
        }
    });

}


public ArrayList<Service> sampleData(){
    ArrayList<Service> dataList = new ArrayList<>();
    for(int i=0;i<30;i++){
        Service servic = new Service();
        servic.setName("Test"+i);
        dataList.add(servic);
    }

    return dataList;
}

}

这篇关于如何使用复选框获取所有选定的列表项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！