使用复选框在自定义列表视图中保存复选框的状态

本文介绍了使用复选框在自定义列表视图中保存复选框的状态的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个带有复选框的列表视图，我希望当用户选择任何复选框并关闭应用程序并再次打开应用程序时，应该选择相同的复选框.即我必须使用 sharedpref 方法保存列表视图项的复选框的状态.在这里我已经实现了相同的，但没有得到想要的结果，我已经尝试了很多，请帮助我.

I have a list view with checkboxes and I want that when user selects any check box and closes the application, and again opens the application, the same checkboxes should be selected. i.e I have to save the state of the checkboxes of the listview items using the sharedpref method.Here I have implemented the same, but not getting the desired result, I have tried a lot please help me.

MyCustomAdapter.java

public class MyCustomBaseAdapter extends BaseAdapter implements OnCheckedChangeListener {
    private static ArrayList<SearchResults> searchArrayList;
    ViewHolder holder;
    private LayoutInflater mInflater;
    Editor editor;
    Context context;

    public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results) {
        searchArrayList = results;
        mInflater = LayoutInflater.from(context);
    }

    public int getCount() {
        return searchArrayList.size();

    }

    public Object getItem(int position) {
        return searchArrayList.get(position);
    }

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

    public View getView(int position, View convertView, ViewGroup parent)
    {
        SharedPreferences sharedPrefs = context.getSharedPreferences("sharedPrefs", Context.MODE_PRIVATE);


        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.custom_row_view, null);
            holder = new ViewHolder();
            holder.txtName = (TextView) convertView.findViewById(R.id.name);
            holder.cB = (CheckBox)convertView.findViewById(R.id.cb_category);

            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }


        editor = sharedPrefs.edit();

        holder.txtName.setText(searchArrayList.get(position).getName());

        holder.cB.setChecked(sharedPrefs.getBoolean("CheckValue", false));

        return convertView;
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        // TODO Auto-generated method stub


        if(holder.cB.isChecked()){

            editor.putBoolean("CheckValue", holder.cB.isChecked());
            editor.commit();
        }
    }


    static class ViewHolder {
        TextView txtName;
        CheckBox cB;
    }

}

CutomListviewActivity.java

public class CustomListViewActivity extends Activity {



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


        ArrayList<SearchResults> searchResults = GetSearchResults();

        final ListView lv1 = (ListView) findViewById(R.id.ListView01);
        lv1.setAdapter(new MyCustomBaseAdapter(this, searchResults));

        lv1.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> a, View view, int position, long id) {
                Object o = lv1.getItemAtPosition(position);
                SearchResults fullObject = (SearchResults)o;
                String s=fullObject.getName().toString();
                Toast.makeText(CustomListViewActivity.this, "You have chosen: " + " " + s, Toast.LENGTH_LONG).show();
                Toast.makeText(CustomListViewActivity.this, s, Toast.LENGTH_LONG).show();

            }
        });


    }



    private ArrayList<SearchResults> GetSearchResults()
    {
        ArrayList<SearchResults> results = new ArrayList<SearchResults>();

        SearchResults sr1 = new SearchResults();
        sr1.setName("John Smith");

        results.add(sr1);

        sr1 = new SearchResults();
        sr1.setName("Jane Doe");

        results.add(sr1);

        sr1 = new SearchResults();
        sr1.setName("Steve Young");

        results.add(sr1);

        sr1 = new SearchResults();
        sr1.setName("Fred Jones");

        results.add(sr1);



        return results;
    }
}

GetterSetter 类

GetterSetter Class

package com.list;

public class SearchResults {
     private String name = "";


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

     public String getName() {
      return name;
     }


    }

row_layout.xml

<?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"
  >
  <TextView
  android:id="@+id/name"
  android:textSize="14sp"
  android:textStyle="bold"
  android:textColor="#FFFFFF"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="TextView"/>


  <CheckBox
      android:id="@+id/cb_category"
      android:layout_height="wrap_content"
      android:layout_width="wrap_content"
      android:layout_marginLeft="25dp"/>

</LinearLayout>

main.xml

<?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" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical|center_horizontal"
        android:text="Custom ListView Contents" />

    <ListView
        android:id="@+id/ListView01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

提前致谢

推荐答案

您的代码几乎是正确的.只需要做一些改变...

Your code is almost right. Just need to do some changes...

检查我的 setOnCheckedChangeListener 代码以获取复选框.. 我希望它能工作

Check My code of setOnCheckedChangeListener for checkbox.. I hope it will work

public class MyCustomBaseAdapter extends BaseAdapter {
    private static ArrayList<SearchResults> searchArrayList;
    ViewHolder holder;
    private LayoutInflater mInflater;
    Editor editor;
    Context context;

    public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results) {
        searchArrayList = results;
        mInflater = LayoutInflater.from(context);
    }

    public int getCount() {
        return searchArrayList.size();

    }

    public Object getItem(int position) {
        return searchArrayList.get(position);
    }

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

    public View getView(int position, View convertView, ViewGroup parent)
    {
        SharedPreferences sharedPrefs = context.getSharedPreferences("sharedPrefs", Context.MODE_PRIVATE);


        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.custom_row_view, null);
            holder = new ViewHolder();
            holder.txtName = (TextView) convertView.findViewById(R.id.name);
            holder.cB = (CheckBox)convertView.findViewById(R.id.cb_category);

            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }


        editor = sharedPrefs.edit();

        holder.txtName.setText(searchArrayList.get(position).getName());

        holder.cB.setChecked(sharedPrefs.getBoolean("CheckValue"+position, false));
       holder.cB.setOnCheckedChangeListener(new OnCheckedChangeListener() {
       @Override
       public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
       editor.putBoolean("CheckValue"+position, isChecked);
       editor.commit();
       }});
        return convertView;
    }


    static class ViewHolder {
        TextView txtName;
        CheckBox cB;
    }

}

这篇关于使用复选框在自定义列表视图中保存复选框的状态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！

CheckBoxes