检查从arrayadapter获取的复选框 [英] Check CheckBox getting from arrayadapter

问题描述

我有标题列表 - CheckBox ，我想控制哪一个将被默认检查。所以我想获得正确的视图和检查，但由于某种原因，它不工作。任何想法为什么？

I have list of title-CheckBox, and i want to have control which one will be checked on default. So I'm trying to get the right view and check it, but for some reason it doesn't work. any idea why?

form_checkbox_item.xml

form_checkbox_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:orientation="horizontal" >
    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="40dp"
        android:textColor="@color/background_red"
        android:padding="12dp"
        />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:text="TextView"
        android:textColor="@color/background_red"
        android:textSize="18sp" />

</LinearLayout>

CheckboxAdapter.java

CheckboxAdapter.java

package com.rgis.datacollection.ui.adapters;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.TextView;

import com.rgis.datacollection.R;

import java.util.List;

public class CheckboxAdapter extends ArrayAdapter
{
    Context context;
    List<String> checkboxItems;
    public CheckboxAdapter(Context context, List<String> resource)
    {
        super(context, R.layout.form_checkbox_item ,resource);

        this.context = context;
        this.checkboxItems = resource;
    }

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

        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        convertView = inflater.inflate(R.layout.form_checkbox_item, parent, false);
        TextView textView = (TextView) convertView.findViewById(R.id.textView1);
        CheckBox cb = (CheckBox) convertView.findViewById(R.id.checkBox1);

        textView.setText(checkboxItems.get(position));
        return convertView;
    }
}

formCheckBox.java的一部分

part of formCheckBox.java

    formItem = (LinearLayout) linflater.inflate(R.layout.checkbox_layout, null);
    listView = (ListView) formItem.findViewById(R.id.checkboxList);
    stringList = dbUtils.getServiceConfigForFixedOptions(attribute.getListValues());
    CheckboxAdapter checkboxAdapter = new CheckboxAdapter(context, stringList);
    listView.setAdapter(checkboxAdapter);

    CheckBox cb = (CheckBox) checkboxAdapter.getView(0, null, listView).findViewById(R.id.checkBox1);
    cb.setChecked(true);

推荐答案

一种方法是在适配器中有一个布尔列表它表示每个复选框的状态。你需要初始化为false，然后使用setCheckbox方法更改特定复选框的状态

One way is having a list of booleans in your adapter which represents the state of every checkbox. You need to init that to false and then with a setCheckbox method change the state of a specific checkbox

public class CheckboxAdapter extends ArrayAdapter
{
   Context context;
   List<Boolean> checkboxState;
   List<String> checkboxItems;
   public CheckboxAdapter(Context context, List<String> resource)
   {
      super(context, R.layout.form_checkbox_item ,resource);

      this.context = context;
      this.checkboxItems = resource;
      this.checkboxState = new ArrayList<Boolean>(Collections.nCopies(resource.size(), true));
   }

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

      LayoutInflater inflater = ((Activity)context).getLayoutInflater();
convertView = inflater.inflate(R.layout.form_checkbox_item, parent, false);
      TextView textView = (TextView) convertView.findViewById(R.id.textView1);
      CheckBox cb = (CheckBox) convertView.findViewById(R.id.checkBox1);

      textView.setText(checkboxItems.get(position));
      cb.setChecked(checkboxState.get(position));
      return convertView;
   }

此方法可让您控制哪些复选框已激活

This method let you control which checkboxes are actived

  void setChecked(boolean state, int position)
  {
     checkboxState.set(position, state);
  }

这篇关于检查从arrayadapter获取的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！