Question

在这里，我选择listitem，其颜色正在针对该特定项目进行更改。当我第二次选择该项目时，此前一项应该被取消，并且需要更改新的项目颜色。

delivery.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            LayoutInflater inflater1 = (LayoutInflater) ct.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View v1 = inflater1.inflate(R.layout.activity_employees_list_for_pop_up, null);
            final Button ok = (Button) v1.findViewById(R.id.do_ok);
            Button cancle = (Button) v1.findViewById(R.id.do_cancle);
            final TextView empId=(TextView)v1.findViewById(R.id.employeeId);
            ok.setEnabled(false);
            listView = (ListView) v1.findViewById(R.id.employeePopUpList);
            employeePopUpAdapter = new EmployeePopUpAdapter(ct, employeeIdNameBeans);

            //enable ok button if listitem is checked
            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
               @Override
               public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                   ok.setEnabled(true);
                   //Toast.makeText(ct, ""+employeeIdNameBeans.get(position).getEmpId(), Toast.LENGTH_SHORT).show();
                   view.setBackgroundColor(Color.GREEN);
                   selectedemployeeid=employeeIdNameBeans.get(position).getEmpId();


               }
           });

我需要让特定的员工改变颜色。

在适配器类中，我只是将值转换为empId和empName

public class EmployeePopUpAdapter extends BaseAdapter {
Context ct;
private List<EmployeeIdNameBean> employeeIdNameBeans;
private int lastPosition = -1;

public EmployeePopUpAdapter(Context ct, List<EmployeeIdNameBean> employeeIdNameBeans) {
    this.ct = ct;
    this.employeeIdNameBeans = employeeIdNameBeans;
}


@Override
public int getCount() {
    return employeeIdNameBeans.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) {
    LayoutInflater inflater = (LayoutInflater) ct.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v = inflater.inflate(R.layout.list_view_for_employee_popup_window, null);
    TextView empId = (TextView) v.findViewById(R.id.employeeId);
    TextView empName = (TextView) v.findViewById(R.id.empFullName);

    //For animation
    Animation animation = AnimationUtils.loadAnimation(ct, (position > lastPosition) ? R.anim.top_from_bottom : R.anim.down_from_top);
    v.startAnimation(animation);
    lastPosition = position;

    final EmployeeIdNameBean empbean = employeeIdNameBeans.get(position);
    empId.setText(empbean.getEmpId());
    empName.setText(empbean.getEmpName());

    return v;
}

}

Answer 1

获取所选项目位置并更改其背景颜色，当您单击其他项目然后刷新列表，即删除所有选定颜色，然后为所选项目设置颜色。

您还可以在模型类中添加布尔参数，然后将所选项的值更改为true，在适配器中检查true值并更改相同的背景颜色，每次清除标志并刷新列表。

Answer 2

试试这样。

public class EmployeePopUpAdapter extends BaseAdapter {

Context ct;
private List<EmployeeIdNameBean> employeeIdNameBeans;
private int lastPosition = -1;
private int chooseItem = -1;

public EmployeePopUpAdapter(Context ct, List<EmployeeIdNameBean> employeeIdNameBeans) {
    this.ct = ct;
    this.employeeIdNameBeans = employeeIdNameBeans;
}


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

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

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

public void setChooseItem(int i) {
    chooseItem = i;
    notifyDataSetChanged();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) ct.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View v = inflater.inflate(R.layout.list_view_for_employee_popup_window, null);
    TextView empId = (TextView) v.findViewById(R.id.employeeId);
    TextView empName = (TextView) v.findViewById(R.id.empFullName);

    //For animation
    Animation animation = AnimationUtils.loadAnimation(ct, (position > lastPosition) ? R.anim.top_from_bottom : R.anim.down_from_top);
    v.startAnimation(animation);
    lastPosition = position;

    final EmployeeIdNameBean empbean = employeeIdNameBeans.get(position);
    empId.setText(empbean.getEmpId());
    empName.setText(empbean.getEmpName());
    // edited here ,change color
    try {
        if (chooseItem == -1) {
        } else {
            if (chooseItem == position) {
                empId.setBackgroundColor(ct.getResources().getColor(android.R.color.holo_blue_bright));
            } else {
                empId.setBackgroundColor(ct.getResources().getColor(android.R.color.holo_red_dark));
            }
        }
    } catch (Exception E) {
    }
    return v;
}
}

在您的活动代码中。

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            adapter.setChooseItem(i);
        }
});

我只需要为listitem选择一个值

2 个答案: