Question

我在里面有一个列表视图，我有带标题的复选框。如果我将点击标题复选框，则应检查所有子复选框。如果我保持列表视图内的复选框，那么我面临问题。我已经附加了我需要实现的图像。这是我的我用于创建列表视图的代码 Listview with section view

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class ListViewCheckboxesActivity extends Activity {

 MyCustomAdapter dataAdapter = null;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  //Generate list View from ArrayList
  displayListView();

  checkButtonClick();

 }

 private void displayListView() {

  //Array list of countries
  ArrayList<Country> countryList = new ArrayList<Country>();
  Country country = new Country("AFG","Afghanistan",false);
  countryList.add(country);
  country = new Country("ALB","Albania",true);
  countryList.add(country);
  country = new Country("DZA","Algeria",false);
  countryList.add(country);
  country = new Country("ASM","American Samoa",true);
  countryList.add(country);
  country = new Country("AND","Andorra",true);
  countryList.add(country);
  country = new Country("AGO","Angola",false);
  countryList.add(country);
  country = new Country("AIA","Anguilla",false);
  countryList.add(country);

  //create an ArrayAdaptar from the String Array
  dataAdapter = new MyCustomAdapter(this,
    R.layout.country_info, countryList);
  ListView listView = (ListView) findViewById(R.id.listView1);
  // Assign adapter to ListView
  listView.setAdapter(dataAdapter);


  listView.setOnItemClickListener(new OnItemClickListener() {
   public void onItemClick(AdapterView<?> parent, View view,
     int position, long id) {
    // When clicked, show a toast with the TextView text
    Country country = (Country) parent.getItemAtPosition(position);
    Toast.makeText(getApplicationContext(),
      "Clicked on Row: " + country.getName(), 
      Toast.LENGTH_LONG).show();
   }
  });

 }

 private class MyCustomAdapter extends ArrayAdapter<Country> {

  private ArrayList<Country> countryList;

  public MyCustomAdapter(Context context, int textViewResourceId, 
    ArrayList<Country> countryList) {
   super(context, textViewResourceId, countryList);
   this.countryList = new ArrayList<Country>();
   this.countryList.addAll(countryList);
  }

  private class ViewHolder {
   TextView code;
   CheckBox name;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {

   ViewHolder holder = null;
   Log.v("ConvertView", String.valueOf(position));

   if (convertView == null) {
   LayoutInflater vi = (LayoutInflater)getSystemService(
     Context.LAYOUT_INFLATER_SERVICE);
   convertView = vi.inflate(R.layout.country_info, null);

   holder = new ViewHolder();
   holder.code = (TextView) convertView.findViewById(R.id.code);
   holder.name = (CheckBox) convertView.findViewById(R.id.checkBox1);
   convertView.setTag(holder);

    holder.name.setOnClickListener( new View.OnClickListener() {  
     public void onClick(View v) {  
      CheckBox cb = (CheckBox) v ;  
      Country country = (Country) cb.getTag();  
      Toast.makeText(getApplicationContext(),
       "Clicked on Checkbox: " + cb.getText() +
       " is " + cb.isChecked(), 
       Toast.LENGTH_LONG).show();
      country.setSelected(cb.isChecked());
     }  
    });  
   } 
   else {
    holder = (ViewHolder) convertView.getTag();
   }

   Country country = countryList.get(position);
   holder.code.setText(" (" +  country.getCode() + ")");
   holder.name.setText(country.getName());
   holder.name.setChecked(country.isSelected());
   holder.name.setTag(country);

   return convertView;

  }

 }

 private void checkButtonClick() {


  Button myButton = (Button) findViewById(R.id.findSelected);
  myButton.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {

    StringBuffer responseText = new StringBuffer();
    responseText.append("The following were selected...\n");

    ArrayList<Country> countryList = dataAdapter.countryList;
    for(int i=0;i<countryList.size();i++){
     Country country = countryList.get(i);
     if(country.isSelected()){
      responseText.append("\n" + country.getName());
     }
    }

    Toast.makeText(getApplicationContext(),
      responseText, Toast.LENGTH_LONG).show();

   }
  });

 }

}

Like this image i heed to be implement

Answer 1

嗯，你没有发布你的真实代码，否则我会告诉你确切的解决方案。现在根据您的示例代码，我可以建议您注意负责在getview方法中设置复选框状态的行：

holder.name.setChecked(country.isSelected());

现在在标题复选框上单击监听器，您所要做的就是将该参数设置为true。根据示例，它将是country.setSelected（true）;对于应在标题点击上检查的所有项目。

然后致电

dataAdapter.notifyDataSetChanged();

它会刷新您的列表视图并将所有这些复选框标记为已选中。

编辑：

以下是使用SeparatedListAdapter选择标题下所有项目的工作代码：

ListSample.java

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class ListSample extends Activity implements HeaderClickListener
    {

        public final static String ITEM_TITLE = "title";
        public final static String ITEM_CAPTION = "caption";

        // SectionHeaders
        private final static String[] days = new String[]{"Mon", "Tue", "Wed", "Thur", "Fri"};

        // MENU - ListView
        private ListView addJournalEntryItem;

        // Adapter for ListView Contents
        private SeparatedListAdapter adapter;

        // ListView Contents
        private ListView journalListView;

        public Map<String, ?> createItem(String title, String caption)
            {
                Map<String, String> item = new HashMap<String, String>();
                item.put(ITEM_TITLE, title);
                item.put(ITEM_CAPTION, caption);
                return item;
            }

        @Override
        public void onCreate(Bundle icicle)
            {
                super.onCreate(icicle);
                // Sets the View Layer
                setContentView(R.layout.main);
                // Interactive Tools
                final ArrayAdapter<String> journalEntryAdapter = new ArrayAdapter<String>(this, R.layout.add_journalentry_menuitem, new String[]{"Add Journal Entry"});
                // AddJournalEntryItem
                addJournalEntryItem = (ListView) this.findViewById(R.id.add_journalentry_menuitem);
                addJournalEntryItem.setAdapter(journalEntryAdapter);
                addJournalEntryItem.setOnItemClickListener(new OnItemClickListener()
                    {
                        @Override
                        public void onItemClick(AdapterView<?> parent, View view, int position, long duration)
                            {
                                String item = journalEntryAdapter.getItem(position);
                                Toast.makeText(getApplicationContext(), item, Toast.LENGTH_SHORT).show();
                            }
                    });

                // Create the ListView Adapter
                adapter = new SeparatedListAdapter(this);
                // Add Sections
                for (int i = 0; i < days.length; i++)
                {
                    ArrayList<CategoryList> categoryLists = new ArrayList<CategoryList>();
                    for(int j = 0; j < 10; j++)
                    {
                    CategoryList categoryList = new CategoryList();
                    categoryList.setSelected(false);
                    categoryList.setTitle(days[i] + j);
                    categoryLists.add(categoryList);
                    }
                    CustomBaseAdpater baseAdpater = new CustomBaseAdpater(categoryLists);
                    adapter.addSection(days[i], baseAdpater);
                }

                // Get a reference to the ListView holder
                journalListView = (ListView) this.findViewById(R.id.list_journal);

                // Set the adapter on the ListView holder
                journalListView.setAdapter(adapter);

                // Listen for Click events
                journalListView.setOnItemClickListener(new OnItemClickListener()
                    {
                        @Override
                        public void onItemClick(AdapterView<?> parent, View view, int position, long duration)
                            {
                                String item = (String) adapter.getItem(position);
                                Toast.makeText(getApplicationContext(), item, Toast.LENGTH_SHORT).show();
                            }
                    });
            }

        private class CustomBaseAdpater extends BaseAdapter
        {

            ArrayList<CategoryList> list = null;
            CustomBaseAdpater( ArrayList<CategoryList> categoryLists )
            {
                this.list = categoryLists;
            }

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

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

            @Override
            public long getItemId(int position) {
                return 0;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                ViewHolder viewHolder = null;
                if (null == convertView)
                {
                    viewHolder = new ViewHolder();
                    LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
                    convertView = inflater.inflate(R.layout.item_row, null);
                    viewHolder.checkBox = (CheckBox) convertView.findViewById(R.id.checkItem);
                    viewHolder.textView = (TextView) convertView.findViewById(R.id.textTitle);
                    convertView.setTag(viewHolder);
                }
                else
                    viewHolder = (ViewHolder) convertView.getTag();

                viewHolder.checkBox.setChecked(list.get(position).isSelected());
                viewHolder.textView.setText(list.get(position).getTitle());

                return convertView;
            }

            private class ViewHolder
            {
                CheckBox checkBox;
                TextView textView;
            }
            private void checkCompleteSection()
            {
                for(CategoryList categoryList : this.list)
                categoryList.setSelected(true);
            }
        }

        @Override
        public void refreshSection(String sectionName) {
            if(adapter.sections.get(sectionName) != null)
            {
                ((CustomBaseAdpater)(adapter.sections.get(sectionName))).checkCompleteSection();
                adapter.notifyDataSetChanged();
            }
        }

    }

SeparatedListAdapter.java

import java.util.LinkedHashMap;
import java.util.Map;

import android.content.Context;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.Toast;

public class SeparatedListAdapter extends BaseAdapter
    {
        public final Map<String, Adapter> sections = new LinkedHashMap<String, Adapter>();
        public final ArrayAdapter<String> headers;
        public final static int TYPE_SECTION_HEADER = 0;
        Context context = null;

        public SeparatedListAdapter(Context context)
            {
                headers = new ArrayAdapter<String>(context, R.layout.list_header);
                this.context = context;
            }

        public void addSection(String section, Adapter adapter)
            {
                this.headers.add(section);
                this.sections.put(section, adapter);
            }

        public Object getItem(int position)
            {
                for (Object section : this.sections.keySet())
                    {
                        Adapter adapter = sections.get(section);
                        int size = adapter.getCount() + 1;

                        // check if position inside this section
                        if (position == 0) return section;
                        if (position < size) return adapter.getItem(position - 1);

                        // otherwise jump into next section
                        position -= size;
                    }
                return null;
            }

        public int getCount()
            {
                // total together all sections, plus one for each section header
                int total = 0;
                for (Adapter adapter : this.sections.values())
                    total += adapter.getCount() + 1;
                return total;
            }

        @Override
        public int getViewTypeCount()
            {
                // assume that headers count as one, then total all sections
                int total = 1;
                for (Adapter adapter : this.sections.values())
                    total += adapter.getViewTypeCount();
                return total;
            }

        @Override
        public int getItemViewType(int position)
            {
                int type = 1;
                for (Object section : this.sections.keySet())
                    {
                        Adapter adapter = sections.get(section);
                        int size = adapter.getCount() + 1;

                        // check if position inside this section
                        if (position == 0) return TYPE_SECTION_HEADER;
                        if (position < size) return type + adapter.getItemViewType(position - 1);

                        // otherwise jump into next section
                        position -= size;
                        type += adapter.getViewTypeCount();
                    }
                return -1;
            }

        public boolean areAllItemsSelectable()
            {
                return false;
            }

        @Override
        public boolean isEnabled(int position)
            {
                return (getItemViewType(position) != TYPE_SECTION_HEADER);
            }

        @Override
        public View getView(int position, View convertView, ViewGroup parent)
            {
                int sectionnum = 0;
                for (Object section : this.sections.keySet())
                    {
                        Adapter adapter = sections.get(section);
                        int size = adapter.getCount() + 1;

                        // check if position inside this section
                        if (position == 0) 
                        {
                         View headerView = headers.getView(sectionnum, convertView, parent);
                         headerView.setTag(section);
                         headerView.setOnClickListener(new OnClickListener() {
                                @Override
                                public void onClick(View v) {
                                    String sectionName = v.getTag().toString();
                                Toast.makeText(context,  sectionName ,2000).show();
                                ((HeaderClickListener) context).refreshSection(sectionName);    
                                }
                            });
                         return headerView;
                        }
                        if (position < size) return adapter.getView(position - 1, convertView, parent);

                        // otherwise jump into next section
                        position -= size;
                        sectionnum++;
                    }
                return null;
            }

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

    }

item_row.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="horizontal" >
    <CheckBox 
        android:id="@+id/checkItem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        />
    <TextView 
        android:id="@+id/textTitle"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

</LinearLayout>

带有复选框的节标题

1 个答案: