2

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目的复选框的状态。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。

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;
    }

}

CutmListviewActivity.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

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>

主要的.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

4

2 回答 2

5

您的代码几乎是正确的。只需要做一些改变...

检查我的setOnCheckedChangeListener复选框代码..我希望它会起作用

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;
    }

}
于 2012-09-27T13:01:23.003 回答
0

声明一个布尔数组来记录setOnCheckedChangeListener()每个位置项的检查状态（在 中），然后调用setChecked()after setOnCheckedChangeListener()。就这么简单。

于 2019-08-19T19:59:48.213 回答