Android：我的复选框“checkAll”不更新我的 ListView 的复选框项目

Question

我的情况：一个带有按钮、一个复选框 checkAll 和一个带有图像、姓名、姓氏和复选框的自定义 ListView 的活动

问题：当我点击 checkAll 时，listView 不会更新 listView 中每个复选框的值（必须全部选中）。

这里有我的 MainActivity 和 listView：

private final static int INFO_DIALOG = 1;
private ListView mList;
private CheckBox checkAll;
private Button buttonCreaPartita;
private Person[] people;
private int peopleSize;


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

     mList= (ListView) findViewById(R.id.list);  //the listView 

     NewQAAdapterSelectFriends adapter= new NewQAAdapterSelectFriends(this); 
     //my adapter
     MainActivity.this.people = new Person[]{ //add person to my array of Person
            new Person(1,"Belen", "Rodriguez", R.drawable.belen,false),
            new Person(2,"Cameron", "Diaz", R.drawable.cameron,false),
            new Person(3,"Jessica", "Alba", R.drawable.alba,false),
            new Person(4,"Yolanthe", "Cabau", R.drawable.cabau,false), 
            new Person(5,"Belen", "Rodriguez", R.drawable.belen,false),
            new Person(6,"Cameron", "Diaz", R.drawable.cameron,false)
            };

     peopleSize=people.length;
     adapter.setData(people); //pass the array of person to my adapter
     mList.setAdapter(adapter);   //set the adpater   

    checkAll =(CheckBox)findViewById(R.id.checkBoxAll);//my CheckAll  checkbox
    checkAll.setChecked(false);//default value

    checkAll.setOnClickListener(new OnClickListener() { 
        @Override
        public void onClick(View v) {

            if((checkAll.isChecked())){

                for(int i=0;i<peopleSize;i++){
                    people[i].setCheck(true); 
                                   //update the new value on the array
                   ((BaseAdapter) mList.getAdapter()).notifyDataSetChanged() ; //i'll try to refresh the value of checkbox in the listview
                 }
            }

            else if(!(checkAll.isChecked())){
                for(int i=0;i<peopleSize;i++){                                                people[i].setCheck(false);
                                                ((BaseAdapter) mList.getAdapter()).notifyDataSetChanged() ;
                        }       
            }
        }
    });        
}


  buttonNext=(Button)findViewById(R.id.button);

    buttonNext.setOnClickListener(new OnClickListener() {
    //after user select the person on the list press buttonNext to go to next Activity
        @Override
        public void onClick(View arg0) {
            Person[] selectedFriends=new Person[peopleSize];
            int countSelected=0;
            for(int i=0;i<peopleSize;i++){
                if(people[i].isCheck()){            
                    selectedFriends[countSelected]=people[i];
                    countSelected++;
                }
            }
            Toast.makeText(getApplicationContext(), "Numero elemento:"+countSelected, Toast.LENGTH_SHORT).show();
            Intent intentMenu=new Intent(getApplicationContext(), MenuActivity.class);
            Toast.makeText(getApplicationContext(), "Partita Creata", Toast.LENGTH_LONG).show();
            startActivity(intentMenu);
        }
    });

这是我的带有 getView function() 的适配器：

    public class NewQAAdapterSelectFriends extends BaseAdapter {
private LayoutInflater mInflater;
private Person[] data;
boolean[] checkBoxState;
ViewHolder viewHolder;

public NewQAAdapterSelectFriends(Context context) { 
    mInflater = LayoutInflater.from(context);
}


public void setData(Person[] data) {
    this.data = data;
    checkBoxState=new boolean[data.length];
    for(int i=0;i<data.length;i++){
        checkBoxState[i]=data[i].isCheck();
    }
}

@Override
public int getCount() {
    return data.length;
}

@Override
public Object getItem(int item) {
    return data[item];
}

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



@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.item_select_friends, null);
        viewHolder=new ViewHolder();

        viewHolder.nameText=(TextView) convertView.findViewById(R.id.personName);
        viewHolder.surnameText=(TextView) convertView.findViewById(R.id.personSurname);
        viewHolder.contactImage=(ImageView) convertView.findViewById(R.id.personImage);
        viewHolder.checkBox=(CheckBox)convertView.findViewById(R.id.checkBox);

        convertView.setTag(viewHolder);

    }
    else{
        viewHolder = (ViewHolder) convertView.getTag();
    }

    viewHolder.nameText.setText(data[position].getName());
    viewHolder.surnameText.setText(data[position].getSurname());
    viewHolder.contactImage.setImageResource(data[position].getPhotoRes());
    viewHolder.contactImage.setScaleType(ScaleType.FIT_XY);
    viewHolder.checkBox.setChecked(checkBoxState[position]);
    viewHolder.checkBox.setOnClickListener(new View.OnClickListener() {

           public void onClick(View v) {
               if(((CheckBox)v).isChecked()){
                   checkBoxState[position]=true;
                   data[position].setCheck(true);
               }else{
                   checkBoxState[position]=false;
                   data[position].setCheck(false);
               }
            }
        });
    viewHolder.checkBox.setChecked(checkBoxState[position]);
    return convertView;
}


static class ViewHolder {
    TextView nameText;
    TextView surnameText;
    ImageView contactImage;
    CheckBox checkBox;
    CheckBox checkAll;
}
}

通过日志，我确信当我点击 checkAll 我的所有项目时，它们的值都会更改为 true（选中），但这不会显示在保持所有未选中状态的相对复选框上...

谢谢你的回答！！！

Answer 1

我建议你像这样通过Adapter 的构造函数传递Person []：

public NewQAAdapterSelectFriends(Context context, Person[] p) { 
    mInflater = LayoutInflater.from(context);
    this.data = p; //set class level variable.
}

从适配器中清除所有boolean[] checkBoxState;，因为您在个人类中有状态引用，即people.setCheck(true);。所以不要使用checkBoxState，而是像这样使用data[position].getCheck()：

viewHolder.checkBox.setChecked(data[position].getCheck()); //to set check box state.

也删除setData(Person[] data)方法，希望一切顺利。