Question

我想在我的自定义适配器中显示/隐藏复选框，但我找不到任何解决方案进行3天的搜索。

在我的自定义适配器中，当用户单击“显示”按钮然后使其可见时，所有复选框都将隐藏为默认值，同时再次单击将其隐藏。这是我的代码。

感谢您的帮助

主要活动

public class PhonebookList extends ListActivity{
private ArrayList<PhoneListView>    lists;
private ArrayList<String>           phoneName   = new ArrayList<String>();
private PhoneListAdapter            adapter;
private ListView                    lv;

private RelativeLayout              rl;
private ImageView                   im1;
private ImageView                   im2;

private boolean                     checkUncheck = true;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_phonelist); // Get main display layout

    lv = (ListView) findViewById(android.R.id.list);

    String uniqueName = "";
    int index = 0;
    lists = new ArrayList<PhoneListView>();

    Cursor phones = getContentResolver().query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null,
            null, null);
    while (phones.moveToNext())
    {
        String name = phones
                .getString(phones
                        .getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
        if(!name.equals(uniqueName))
        {
            uniqueName = name;
            phoneName.add(name);
            lists.add(new PhoneListView(name, index, checkUncheck));

            index++;
        }
        else
        {
            continue;
        }
    }

    int x = lists.size();
    PhoneListView[] toArray = new PhoneListView[x];
    toArray = lists.toArray(toArray);

    adapter = new PhoneListAdapter(this,
            R.layout.custom_phone_listview_rows, toArray); // Layout whose hold rows
    lv.setAdapter(adapter);
    lv.setClickable(true);

    lv.setOnItemClickListener(new OnItemClickListener()
    {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id)
        {
            Intent i = new Intent(getApplicationContext(),
                    PhoneBookDetail.class);
            i.putExtra("id", phoneName.get(position));
            startActivity(i);
        }
    });
}

@Override
protected void onResume()
{
    final ImageView showButton = (ImageView) findViewById(R.id.show_hide_button);
    showButton.setBackgroundResource(R.drawable.icon_choise);

    showButton.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            if(checkUncheck)
            {
                showButton.setBackgroundResource(R.drawable.icon_choise);
                checkUncheck = false;

                rl.setVisibility(View.GONE);
                im1.setVisibility(View.GONE);
                im2.setVisibility(View.GONE);
            }
            else
            {
                showButton.setBackgroundResource(R.drawable.icon_completion);
                checkUncheck = true;

                rl.setVisibility(View.VISIBLE);
                im1.setVisibility(View.VISIBLE);
                im2.setVisibility(View.VISIBLE);
            }
        }
    });

    rl  = (RelativeLayout) findViewById(R.id.show_hide_bar);
    im1 = (ImageView) findViewById(R.id.show_hide_backup);
    im2 = (ImageView) findViewById(R.id.show_hide_checkall);

    rl.setVisibility(View.GONE);
    im1.setVisibility(View.GONE);
    im2.setVisibility(View.GONE);
    super.onResume();
}

public void backupForChecked(View v){
    if(adapter.checkedItem.size() == 0)
        Toast.makeText(getApplicationContext(), "Select atleast one item", Toast.LENGTH_SHORT).show();
    else
    {
        //  Send selected values as Array
        int[] myArray = new int[adapter.checkedItem.size()];

        Bundle b=new Bundle();
        for(int i = 0; i < adapter.checkedItem.size(); i++)
        {
            myArray[i] = Integer.parseInt(adapter.checkedItem.get(i));
        }
        b.putIntArray("contactID", myArray);

        Intent i = new Intent(getApplicationContext(), SaveAllWithoutAsk.class);
        i.putExtra("contactID", myArray);
        startActivity(i);
    }
}

public void checkUncheckAll(View v)
{

}

public void modoru(View v)
{
    finish();
}
  }

自定义ListView

package custom_list;

  public class PhoneListView{
private String  name;
private int     id;
private boolean itemToggled = false;

public PhoneListView()
{
    super();
}

public PhoneListView(String name, int id, boolean itemToggled)
{
    this.setName(name);
    this.setId(id);
    this.setItemToggled(itemToggled);
}

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

public void setId(int id)
{
    this.id = id;
}

public String getName()
{
    return name;
}

public int getId()
{
    return id;
}

public boolean getItemToggled()
{
    return itemToggled;
}

public void setItemToggled(boolean itemToggled)
{
    this.itemToggled = itemToggled;
}
  }

我的自定义适配器

public class PhoneListAdapter extends ArrayAdapter<PhoneListView>{
private Context             context;
private int                 resID;
private PhoneListView[]     data        = null;
public ArrayList<String>    checkedItem = new ArrayList<String>();

public PhoneListAdapter(Context context, int resource,
        PhoneListView[] objects)
{
    super(context, resource, objects);
    this.context = context;
    this.resID = resource;
    this.data = objects;
}

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

    if (row == null)
    {
        LayoutInflater inflate = ((Activity) context).getLayoutInflater();
        row = inflate.inflate(resID, null);

        holder = new CustomHolder();
        holder.cb = (CheckBox) row.findViewById(R.id.phonelist_checkbox);
        holder.tw = (TextView) row
                .findViewById(R.id.phonelist_contact_name);

        row.setTag(holder);
    }
    else
        holder = (CustomHolder) row.getTag();

    final PhoneListView plv = data[position];
    holder.tw.setText(plv.getName().toString());
    holder.id = plv.getId();

    holder.checked = plv.getItemToggled();

    if (holder.checked == false)
        holder.cb.setVisibility(View.GONE);
    else
    {
        holder.cb.setVisibility(View.VISIBLE);
        holder.cb.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                if (((CompoundButton) v).isChecked())
                {
                    checkedItem.add("" + plv.getId());
                }
                else
                {
                    checkedItem.remove("" + plv.getId());
                }
            }
        });
    }

    return row;
}

public class CustomHolder
{
    CheckBox    cb;
    TextView    tw;
    int         id;
    boolean     checked;
}
  }

屏幕截图在这里

enter image description here

Answer 1

您应该通过调用按钮的notifyDatasetChanged()中的OnClickListener功能来通知适配器数据集已更改。

如果row为null，您还应该删除检查。通常，重复使用视图是一种好习惯，但由于您的视图发生了更改，并且您需要在更改设置后进行更新，因此需要重新创建项目。

Answer 2

感谢您的回复。我已经解决了我的问题＃1我将在这里写出解决方案，可以帮助别人的时间和头发。

我创建了新的公共方法，并在点击显示/隐藏按钮时调用它。

现在我仍在研究如何处理检查/取消选中所有内容，我仍需要提示和帮助

Answer 3

我认为您可以为复选框的数量创建一个循环，然后遍历循环，即

1）您可以使用一个名为checkall（）的方法，其中所有元素都将循环并检查其状态，如果选中则将保持检查状态，如果未选中则将被检查。

2）另一个uncheckall（）循环方法，取消选中所有复选框。

3）另外，看看你是否可以为你拥有的复选框创建一个复选框组。

最好的问候

下面的代码是来自android示例代码的一些代码的修改版本，看它是否有帮助。

public void onCheckboxClicked（查看视图）{

// Here you can create an array of the check boxes available in the view .

// create a loop which will check which one of the check boxes is checked and which one is not

for（...... ....）

{ boolean checked =（（CheckBox）view）.isChecked（）;

// Check which checkbox was clicked
switch(view.getId()) {
    case R.id.checkbox_meat:
        if (checked)
            // Put some meat on the sandwich
        else
            // Remove the meat
        break;
    case R.id.checkbox_cheese:
        if (checked)
            // Cheese me
        else
            // I'm lactose intolerant
        break;
    // TODO: Veggie sandwich

   }
}

}

Answer 4

您可以将您使用的布局xml文件显示出来吗？窗口小部件具有分配给它们的属性，根据需要显示/隐藏它们。检查您的复选框小部件是否有这样的权利。

问候普拉萨德

在自定义适配器中显示/隐藏复选框

4 个答案: