notifyDataSetChanged用于多个复选框

时间：2011-11-28 06:24:14

标签： android checkbox android-arrayadapter

multiple_checkboxes

在附加图片中，活动中存在SelectAll checkbox，适配器中存在checkboxes。 如果我checked SelectAll，那么在适配器中检查所有复选框，如果我取消选中，则取消选中所有复选框。它发生得很好。

但是如果我checked SelectAll我想要，之后如果我uncheked在适配器中有一个或多个复选框，那么SelectAll checkbox should unchecked。 如果没有检查SelectAll如果我手动检查适配器中的所有复选框，然后自动SelectAll checkbox should checked。

我该怎么做。

贝洛是我的代码。， http://pastebin.com/5pUJJC42

7 个答案:

答案 0 :(得分：7)

我确实喜欢下面，我得到了我所需的输出，

http://pastebin.com/PgNeDnXq

答案 1 :(得分：3)

我试过这样的事情，

将checkAll复选框传递给Adapter类构造函数，并在其中设置Listener，这样我们就不需要从Main Class声明任何标志public static。

此外，我还使用了几个保持复选框状态的标志，这是我试图维护的，当checkAll复选框检查更改时，它不会影响列表项复选框，反之亦然，列表项复选框检查。

所以，试试这个

public class myAdapter extends ArrayAdapter<Model> {

    private final List<Model> list;
    private final Activity context;
    private CheckBox checkAll;
    boolean checkAll_flag = false;
    boolean checkItem_flag = false;

    public myAdapter(Activity context, List<Model> list, CheckBox checkAll) {
        super(context, R.layout.row, list);
        this.context = context;
        this.list = list;
        this.checkAll = checkAll;
        checkAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton checkbox, boolean arg1) {
                if(!checkItem_flag){
                    checkAll_flag = true;
                    notifyDataSetChanged(); 
                }
            }
        });
    }

    static class ViewHolder {
        protected TextView text;
        protected CheckBox checkbox;
    }

    private boolean areAllSelected() {

         boolean areAllSelected = false;

          for (int i = 0; i < list.size(); i++) {
              if(list.get(i).isSelected()){
                  areAllSelected = true;
              }
              else{
                  areAllSelected = false;
                  return areAllSelected;
              }
          }
          return areAllSelected;
        }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View view = null;
        if (convertView == null) {
            LayoutInflater inflator = context.getLayoutInflater();
            view = inflator.inflate(R.layout.row, null);
            final ViewHolder viewHolder = new ViewHolder();
            viewHolder.text = (TextView) view.findViewById(R.id.label);
            viewHolder.checkbox = (CheckBox) view.findViewById(R.id.check);
            viewHolder.checkbox
                    .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                            Model element = (Model) viewHolder.checkbox.getTag();
                            element.setSelected(buttonView.isChecked());

                            if(!checkAll_flag){
                                checkItem_flag = true;
                                if(buttonView.isChecked()){
                                    checkAll.setChecked(areAllSelected());
                                }
                                if(!buttonView.isChecked()){
                                    checkAll.setChecked(areAllSelected());                              
                                }
                                checkItem_flag = false;
                            }
                        }
                    });
            view.setTag(viewHolder);
            viewHolder.checkbox.setTag(list.get(position));
        } else {
            view = convertView;
            ((ViewHolder) view.getTag()).checkbox.setTag(list.get(position));
        }
        ViewHolder holder = (ViewHolder) view.getTag();
        holder.text.setText(list.get(position).getName());
        holder.checkbox.setChecked(list.get(position).isSelected());    

        if(checkAll_flag){
            if(checkAll.isChecked()){
                holder.checkbox.setChecked(true);
            }
            else if(!checkAll.isChecked()){
                holder.checkbox.setChecked(false);
            }
            if(position == (list.size() -1)){
                checkAll_flag = false;
            }
        }
        return view;
    }
}

答案 2 :(得分：3)

我过去也遇到过类似的问题。您需要行视图来实现Checkable。检查this question。

答案 3 :(得分：2)

你可以创建一个与项目列表相对应的布尔数组，并且在适配器中你应该切换相应的选中/取消选中的布尔值，并在适配器上的每个检查中，布尔数组的所有元素都是真的吗？然后setchecked（true）selectall_checkbox，否则保持setchecked（未选中）。

答案 4 :(得分：2)

修改

您的适配器应如下所示：

public class InteractiveArrayAdapter extends ArrayAdapter<Model> {
  private final List<Model> list;
  private final Activity context;
  private CheckBox selectAll;

  public InteractiveArrayAdapter( Activity context, List<Model> list, CheckBox selectAll ) {
    super( context, R.layout.list_items_attendance_payment, list );
    this.context = context;
    this.list = list;
    this.selectAll = selectAll;
  }

  static class ViewHolder {
    protected TextView text;
    protected CheckBox checkbox;
  }

  @Override
  public View getView( final int position, View convertView, ViewGroup parent ) {
    View view = null;

    if( convertView == null ) {
      LayoutInflater inflator = context.getLayoutInflater();
      view = inflator.inflate( R.layout.list_items_attendance_payment, null );
      final ViewHolder viewHolder = new ViewHolder();
      viewHolder.text = (TextView) view.findViewById( R.id.name );
      viewHolder.checkbox = (CheckBox) view.findViewById( R.id.check );
      view.setTag( viewHolder );
    }
    else {
      view = convertView;
    }

    ViewHolder holder = (ViewHolder) view.getTag();
    holder.text.setText( list.get( position ).getName() );

    viewHolder.checkbox.setOnCheckedChangeListener( new CompoundButton.OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged( CompoundButton buttonView, boolean isChecked ) {
        AttendanceActivity.listMember.get( position ).setSelected( isChecked );
        list.get( position ).setSelected( buttonView.isChecked() );
        selectAll.setChecked( areAllSelected() ); // We just use the method as parameter as it returns a boolean.
      }
    } );

    if( selectAll.isChecked() )
      holder.checkbox.setChecked( true );
    else
      holder.checkbox.setChecked( list.get( position ).isSelected() );

    return view;
  }

  public void deselectAll() {
    for( Model element : list )
      element.setSelected( false );

    notifyDataSetChanged();
  }

  public void selectAll() {
    for( Model element : list )
      element.setSelected( true );

    notifyDataSetChanged();
  }

  private boolean areAllSelected() {
    for( Model element : list )
      if( !element.getSelected() )
        return false; // We conclude that not all are selected.

    return true; // All of the items were selected
  }
}

设置Activity的{​​{1}}中的方法应更改为：

OnCheckedChangedListener

答案 5 :(得分：2)

这是一个简单的解决方案。

@Override
public View getView(int position, View v, ViewGroup arg2) {
    final PillTime pillTime = arrPillTimes.get(position);
    if(v == null) {
        v = inflater.inflate(R.layout.select_time_row, null);
    }
    TextView tvTitle = (TextView)v.findViewById(R.id.tvTitle);
    TextView tvTime = (TextView)v.findViewById(R.id.tvTime);

    tvTime.setText(pillTime.getTime());

    final CheckBox cbtime = (CheckBox)v.findViewById(R.id.cbtime);
    cbtime.setChecked(false);
    for (PillTime pillTime2 : arrSelectedTimes) {
        if(pillTime2.getId().equals(pillTime.getId())) {
            cbtime.setChecked(true);
            break;
        }
    }
    tvTitle.setText(pillTime.getTitle());
    cbtime.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            if(cbtime.isChecked()) {
                boolean contains = false;
                for (PillTime pillTime2 : arrSelectedTimes) {
                    if(pillTime2.getId().equals(pillTime.getId())) {
                        contains = true;
                        break;
                    }
                }
                if(!contains) {
                    arrSelectedTimes.add(pillTime);
                    if(arrPillTimes.size() == arrSelectedTimes.size()) {
                        cbSelectAll.setChecked(true);
                    }
                }
            }else {
                for (PillTime pillTime2 : arrSelectedTimes) {
                    if(pillTime2.getId().equals(pillTime.getId())) {
                        arrSelectedTimes.remove(pillTime2);
                        cbSelectAll.setChecked(false);
                        break;
                    }
                }
            }
        }
    });

    return v;
}

我有一个主arrayList arrPillTimes，它包含所有数据，我有第二个arrayList arrSelectedTimes将保留已检查项目的跟踪。我们将检查所选项目是否在arrSelectedTimes中，这意味着您已检查该项目，因此您必须将该复选框的checked属性设置为true。

答案 6 :(得分：1)

尝试使用CheckedTextView解决此问题

<强> main.xml中 

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

    <ListView
        android:id="@+id/listView"
        android:scrollbars="vertical" android:divider="#C0C0C0" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" android:cacheColorHint="#00000000" android:dividerHeight="1dip">
    </ListView>
    <LinearLayout android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:layout_width="match_parent">
        <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="All"></Button>
        <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="None"></Button>
        <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Done"></Button>
    </LinearLayout>

</LinearLayout>

<强> listrow.xml 

<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/text"
   android:textAppearance="?android:attr/textAppearanceLarge"
   android:gravity="center_vertical"
   android:checkMark="?android:attr/listChoiceIndicatorMultiple"
   android:background="#ffffff" android:layout_width="fill_parent" android:layout_height="fill_parent" android:textColor="#000000" android:padding="15dip"/>

<强> CheckedTextVwActivity.java 

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

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.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckedTextView;
import android.widget.ListView;
import android.widget.Toast;

public class CheckedTextVwActivity extends Activity {
    /** Called when the activity is first created. */
    ListView listView;
    ListAdapter adapter;
    ArrayList<String> strings = new ArrayList<String>();
    Button button1,button2,button3;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView) findViewById(R.id.listView);
        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);
        button3 = (Button) findViewById(R.id.button3);
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        strings.add(new String("B"));
        strings.add(new String("A"));
        TopicSelectionListAdapter topicSelectionListAdapter = new TopicSelectionListAdapter(
                CheckedTextVwActivity.this, R.layout.listrow, strings);
        listView.setAdapter(topicSelectionListAdapter);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        for(int i=0;i<strings.size();i++){
            listView.setItemChecked(i, true);
        }

        listView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View view, int position,
                    long arg3) {
                CheckedTextView selectedItem = (CheckedTextView) view;
                boolean isChecked = selectedItem.isChecked();
                Log.e("TAG","item clicked position = " + position + " isChecked = " + isChecked);               
            }
        });

        button1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                for(int i=0;i<strings.size();i++){
                    listView.setItemChecked(i, true);
                }
            }
        });

        button2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                for(int i=0;i<strings.size();i++){
                    listView.setItemChecked(i, false);
                }
            }
        });

        button3.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                int count = listView.getAdapter().getCount();
                String savedItems = null;
                for (int i = 0; i < count; i++) {

                    if (listView.isItemChecked(i)) {
                            savedItems = savedItems + listView.getItemAtPosition(i).toString() + ",";
                    }

                }
                Toast.makeText(CheckedTextVwActivity.this, ""+savedItems, Toast.LENGTH_LONG).show();
            }
        });


    }

    public class TopicSelectionListAdapter extends ArrayAdapter {
        @SuppressWarnings("unchecked")
        public TopicSelectionListAdapter(Context context,
                int textViewResourceId, List objects) {
            super(context, textViewResourceId, objects);
        }

        @Override
        public long getItemId(int currentPosition) {
            return super.getItemId(currentPosition);
        }

        @Override
        public View getView(int currentPosition, View convertView,
                ViewGroup parent) {
            View v = convertView;
            final LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.listrow, null);
            final CheckedTextView textView = (CheckedTextView) v
            .findViewById(R.id.text);
            textView.setText(strings.get(currentPosition));
            return v;
        }
    }
}
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