Adapter

ArrayAdapter Demo:

public class ArrayAdapterDemo extends Activity {

    private ListView lv;
    ArrayAdapter<String> adapter;
    String [] data;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.arrayadapter);
        lv = (ListView) findViewById(R.id.lv);
        
//        data = new String[] { "1", "2", "3"};
//        adapter = new ArrayAdapter<String>(this, R.layout.item, R.id.tv, data);
//        to find the textview and show it's groups
//        lv.setAdapter(adapter);
//        绑定数据源 entry情况下不需要设定数据源，系统已经默认提供(this time give you a default adapter)
        
    }
}

arrayadapter.xml

<ListView
        android:id="@+id/lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
</ListView>
<!-- android:entries="@array/datas" -->

 

item.xml

    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <ImageView 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/ic_launcher"/>

 

SimpleAdapter Demo：

public class SimpleAdapterDemo extends Activity{
    private SimpleAdapter simpleAdapter;
    private ArrayList<HashMap<String, Object>> dataList;
    private ListView lv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.arrayadapter);
        lv = (ListView) findViewById(R.id.lv);
        HashMap<String, Object> map;
        dataList = new ArrayList<HashMap<String, Object>>();
        String[] text = new String[] { "first1", "second1", "third1" };
        String[] text2 = new String[] { "first2", "second2", "third2" };
        int[] resourceId = new int[] { R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher };
        
        for (int i = 0; i < 3; i++) {
            map = new HashMap<String, Object>();
            map.put("img", resourceId[i]);
            map.put("text1", text[i]);
            map.put("text2", text2[i]);
            dataList.add(map);
        }
        
        String[] key = new String[] { "img", "text1", "text2"};
        int[] id = new int[] { R.id.img, R.id.text1, R.id.text2 };
        simpleAdapter = new SimpleAdapter(this, dataList, R.layout.simple, key, id);
        lv.setAdapter(simpleAdapter);
    }
    
}

 

CustomAdapter Demo:

public class BlogsAdapter extends BaseAdapter {

    private List<BlogsInfo> blogsList;
    private Context cxt;
    Boolean isEyeShield = false;

    public BlogsAdapter() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @param blogsList
     * @param cxt
     */
    public BlogsAdapter(Context cxt, List<BlogsInfo> blogsList) {
        super();
        this.blogsList = blogsList;
        this.cxt = cxt;

        IntentFilter filter = new IntentFilter();
        filter.addAction(Constants.ACTION_EYE_SHIELD);
        filter.setPriority(Integer.MAX_VALUE);
        cxt.registerReceiver(myReceiver, filter);

        getPreference();
    }

    private BroadcastReceiver myReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            isEyeShield = intent.getBooleanExtra("eyeshield", false);
            notifyDataSetChanged();
        }
    };

    public void setBlogsList(List<BlogsInfo> blogsList) {
        this.blogsList = blogsList;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return blogsList.size();
    }

    @Override
    public BlogsInfo getItem(int position) {
        // TODO Auto-generated method stub
        return blogsList.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (null == convertView) {
            convertView = View.inflate(cxt, R.layout.blog_list_item, null);
            holder = new ViewHolder();

            holder.title = (TextView) convertView
                    .findViewById(R.id.tv_blog_list_title);
            holder.authorName = (TextView) convertView
                    .findViewById(R.id.tv_blog_list_authorname);
            holder.summary = (TextView) convertView
                    .findViewById(R.id.tv_blog_list_summary);
            holder.published_views_comments = (TextView) convertView
                    .findViewById(R.id.tv_blog_list_published_views_comments);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        // TODO Auto-generated method stub
        // accidently find the recycle princile
        if (isEyeShield) {
            if (position % 2 == 0) {
                convertView.setBackgroundColor(Color.parseColor("#8E8E8E"));
            } else {
                convertView.setBackgroundColor(Color.parseColor("#D3D3D3"));
            }
        } else {
            if (position % 2 == 0) {
                convertView.setBackgroundColor(Color.parseColor("#BCD2EE"));
            } else {
                convertView.setBackgroundColor(Color.parseColor("#FFFFFF"));
            }
        }

        holder.title.setText(getItem(position).getTitle());
        holder.authorName.setText(getItem(position).getAuthorName());
        holder.summary.setText(getItem(position).getSummary());
        holder.published_views_comments.setText(getItem(position)
                .getPublished()
                + "     |浏览:"
                + getItem(position).getViews()
                + " |评论:" + getItem(position).getComments());
        return convertView;
    }

    static class ViewHolder {
        TextView title;
        TextView authorName;
        TextView summary;
        TextView published_views_comments;
    }

    private void getPreference() {
        SharedPreferences preferences = cxt.getSharedPreferences(
                "mypreferences", Activity.MODE_PRIVATE);
        Boolean eyeshield = preferences.getBoolean("eyeshield", false);
        isEyeShield = eyeshield;
    }
    
    public void destroyBlogsReceiver() {
        cxt.unregisterReceiver(myReceiver);
    }
}

blog_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tv_blog_list_title"
        style="@style/main_news_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/tv_blog_list_authorname"
        style="@style/main_news_sourceNam_pub"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/tv_blog_list_summary"
        style="@style/main_news_summary"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/tv_blog_list_published_views_comments"
        style="@style/main_news_sourceNam_pub"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>