如何在ListView Acitivity中实现CustomAdapter

创建一个

custom_item

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/listItemImgView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:contentDescription="@string/done"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/listItemTxtView"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1" /></LinearLayout>

创建一个这样的自定义适配器

public class CustomAdapter extends ArrayAdapter<Tweet> {    private Context mContext;    private int layoutId;    private ArrayList<Tweet> dataList;    public CustomAdapter(Context context, int resourceId, ArrayList<Tweet> objects) {        super(context, resourceId, objects);        // TODO Auto-generated constructor stub        mContext = context;        layoutId = resourceId;        dataList = objects;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub        ViewHolder viewHolder;        if(convertView == null) { LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(layoutId, null); viewHolder = new ViewHolder(); viewHolder.listItemTxtView = (TextView) convertView.findViewById(R.id.listItemTxtView); viewHolder.listItemImgView = (ImageView) convertView.findViewById(R.id.listItemImgView); convertView.setTag(viewHolder);        } else { viewHolder = (ViewHolder) convertView.getTag();        }        viewHolder.listItemTxtView.setText(dataList.get(position).toString());        //place picasso jar into libs folder of your project and use it for download and  set images like this        Picasso.with(context).load("url of image you want to load").into(viewHolder.listItemImgView);        return convertView;    }    private class ViewHolder {        TextView listItemTxtView;        ImageView listItemImgView;    }}

picasso

代替这个

ArrayAdapter<Tweet> adapter = new ArrayAdapter<Tweet>(activity, android.R.layout.simple_list_item_1, twits);setListAdapter(adapter);

用这个

CustomAdapter adapter = new CustomAdapter(MainActivity.this, R.layout.custom_item, twits);setListAdapter(adapter);