Adapter(7)BaseAdapter示例

BaseAdapter是完全自定义的adapter.可定制化程度最高.

1.BaseAdapterFrgmt.java

public class BaseAdapterFrgmt extends Fragment {

    private ListView list;
    private List<Map<String,Object>> data;
    private CustomBaseAdapter adapter; 
    
    
    private void init(){
        data = new ArrayList<Map<String,Object>>();
        Map<String,Object> map;
        for (int i = 0; i < 20; i++) {
            map = new HashMap<String, Object>();
            map.put("icon", R.drawable.ic_launcher);
            map.put("title", "title"+i);
            map.put("content", "content"+i);
            data.add(map);
        }
        adapter = new CustomBaseAdapter(getActivity(), data);
        list.setAdapter(adapter);
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.frgmt_base_adapter, container,false);
        list = (ListView) v.findViewById(R.id.base_adapter_list_view);
        init();
        return v;
    }
}

2.CustomBaseAdapter.java

public class CustomBaseAdapter extends BaseAdapter {
    
    public final class ViewItemData {
        public int icon_resid;
        public String title_txt;
        public String content_txt;
        public String submit_btn;
    }
    
    private LayoutInflater mInflater;
    private List<Map<String, Object>> mdata;
    private Context mContext;

    public CustomBaseAdapter(Context context, List<Map<String, Object>> data) {
        mContext = context;
        mInflater = LayoutInflater.from(context);
        mdata = data;
    }

    @Override
    public int getCount() {
        return mdata.size();
    }

    @Override
    public Object getItem(int position) {
        return mdata.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list_item_base_adapter,
                    null);
        }
        ImageView icon = (ImageView) convertView
                .findViewById(R.id.vid_iv_base_adapter);
        TextView title = (TextView) convertView
                .findViewById(R.id.vid_tv_title_base_adapter);
        TextView content = (TextView) convertView
                .findViewById(R.id.vid_tv_content_base_adapter);
        Button viewBtn = (Button) convertView
                .findViewById(R.id.vid_btn_base_adapter);
        HashMap<String, Object> hm = (HashMap<String, Object>) mdata
                .get(position);
        title.setText((String) hm.get("title"));
        content.setText((String) hm.get("content"));
        viewBtn.setText("button" + position);
        final int pos = position;
        viewBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "title" + pos, Toast.LENGTH_SHORT).show();
            }
        });
        return convertView;
    }

}

　　这个getView方法写的不对，性能有问题，这样每次都要findViewById,正确写法应该使用ViewHolder和tag，见：

　　http://www.cnblogs.com/sjjg/articles/5446654.html

3.baseadapter的主布局文件

frgmt_base_adapter.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" >

    <ListView
        android:id="@+id/base_adapter_list_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent" >
    </ListView>

</LinearLayout>

4.base-adapter对应的list-view的item布局文件

list_item_base_adapter.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:gravity="center_vertical"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/vid_iv_base_adapter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/vid_tv_title_base_adapter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/title" />

        <TextView
            android:id="@+id/vid_tv_content_base_adapter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/content" />

    </LinearLayout>

    <Button
        android:id="@+id/vid_btn_base_adapter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button" />

</LinearLayout>