ListView分类展示

转载：http://blog.csdn.net/z_guijin/article/details/6630620

 

. 引言

 

    在Android开发过程中往往有这样的需求，将ListView中的内容按年，月，日进行分类显示，要实现这样的效果我们可能有很多种方法，

 

    如：多ListView拼合，自定义ListView组件等，下面介绍一种比较简单，而且实现结构清晰的实现方式，效果图及实现如下。

 

2. 效果图

 

 

3. 功能实现

 

    (1) 主布局(main.xml)实现：

 

    <?xml version="1.0" encoding="utf-8"?>  
    <LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"  
        android:orientation = "vertical"  
        android:layout_width = "fill_parent"  
        android:layout_height = "fill_parent"  
        >  
        <ListView  
            android:id = "@+id/categoryList"  
            android:layout_width = "fill_parent"   
            android:layout_height = "fill_parent"  
            />  
    </LinearLayout>   

(2) 主Activity实现：

package com.flora;  
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.view.ViewGroup;  
import android.widget.ArrayAdapter;  
import android.widget.ListView;  
import android.widget.TextView;  
public class ListViewCategoryActivity extends Activity {  
      
    private String [] mContacts = {"马英才", "张三", "李四"};  
    private String [] mMusic = {"素顔", "庐州月", "半城烟沙"};  
    private String [] mEBook = {"拆掉思维里的墙", "淡定力", "人脉决定命脉"};  
      
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
          
        mCategoryAdapter.addCategory("人名", new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mContacts));  
          
        mCategoryAdapter.addCategory("音乐",new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mMusic));  
          
        mCategoryAdapter.addCategory("书籍",new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mEBook));  
          
        ListView categoryList = (ListView) findViewById(R.id.categoryList);  
          
        categoryList.setAdapter(mCategoryAdapter);  
    }  
      
    private CategoryAdapter mCategoryAdapter = new CategoryAdapter() {  
        @Override  
        protected View getTitleView(String title, int index, View convertView, ViewGroup parent) {  
            TextView titleView;  
              
            if (convertView == null) {  
                titleView = (TextView)getLayoutInflater().inflate(R.layout.title, null);  
            } else {  
                titleView = (TextView)convertView;  
            }  
              
            titleView.setText(title);  
              
            return titleView;  
        }  
    };  
      
}

 (3) Adapter实现：

package com.flora;  
import java.util.ArrayList;  
import java.util.List;  
import android.view.View;  
import android.view.ViewGroup;  
import android.widget.Adapter;  
import android.widget.BaseAdapter;  
public abstract class CategoryAdapter extends BaseAdapter {  
    private List<Category> categories = new ArrayList<Category>();  
      
    public void addCategory(String title, Adapter adapter) {  
        categories.add(new Category(title, adapter));  
    }  
      
    @Override  
    public int getCount() {  
        int total = 0;  
          
        for (Category category : categories) {  
            total += category.getAdapter().getCount() + 1;  
        }  
          
        return total;  
    }  
    @Override  
    public Object getItem(int position) {  
        for (Category category : categories) {  
            if (position == 0) {  
                return category;  
            }  
              
            int size = category.getAdapter().getCount() + 1;  
            if (position < size) {  
                return category.getAdapter().getItem(position-1);  
            }  
            position -= size;  
        }  
          
        return null;  
    }  
    @Override  
    public long getItemId(int position) {  
        return position;  
    }  
      
    public int getViewTypeCount() {  
        int total = 1;  
          
        for (Category category : categories) {  
            total += category.getAdapter().getViewTypeCount();  
        }  
          
        return total;  
    }  
    public int getItemViewType(int position) {  
        int typeOffset = 1;  
          
        for (Category category : categories) {  
            if (position == 0) {  
                return 0;  
            }  
              
            int size = category.getAdapter().getCount() + 1;  
            if (position < size) {  
                return typeOffset + category.getAdapter().getItemViewType(position - 1);  
            }  
            position -= size;  
              
            typeOffset += category.getAdapter().getViewTypeCount();  
        }  
          
        return -1;  
    }  
    @Override  
    public View getView(int position, View convertView, ViewGroup parent) {  
        int categoryIndex = 0;  
          
        for (Category category : categories) {  
            if (position == 0) {  
                return getTitleView(category.getTitle(), categoryIndex,convertView, parent);  
            }  
            int size = category.getAdapter().getCount()+1;  
            if (position < size) {  
                return category.getAdapter().getView(position - 1, convertView, parent);  
            }  
            position -= size;  
              
            categoryIndex++;  
        }  
          
        return null;  
    }  
      
    protected abstract View getTitleView(String caption,int index,View convertView,ViewGroup parent);  
      
} 

  (4) 分类ValueBean实现：

package com.flora;  
import android.widget.Adapter;  
public class Category {  
    private String mTitle;  
      
    private Adapter mAdapter;  
    public Category(String title, Adapter adapter) {  
        mTitle = title;  
        mAdapter = adapter;  
    }  
      
    public void setTile(String title) {  
        mTitle = title;  
    }  
      
    public String getTitle() {  
        return mTitle;  
    }  
      
    public void setAdapter(Adapter adapter) {  
        mAdapter = adapter;  
    }  
      
    public Adapter getAdapter() {  
        return mAdapter;  
    }  
      
} 

 (5) 分类Title实现：

    <?xml version="1.0" encoding="utf-8"?>  
    <TextView  
        xmlns:android = "http://schemas.android.com/apk/res/android"  
        android:layout_width = "match_parent"  
        android:layout_height = "match_parent"  
        android:minHeight = "30dip"  
        android:gravity = "center_vertical"  
        android:paddingLeft = "10dip"  
        android:background = "@color/title_background_color"  
        />