public class CyCameraAdapter extends ArrayAdapter<Bitmap>{
    private int mResourceId;
    private List<Bitmap> listBitmap;
    private LayoutInflater mLayoutInflater;
    public CyCameraAdapter(Context context, int imgViewResourceId, List<Bitmap> listBitmap) {
        super(context, 
 
imgViewResourceId, listBitmap);
        this.mResourceId = imgViewResourceId;
mLayoutInflater = LayoutInflater.from(context);
}

    @Override
public View getView(int position, View convertView, ViewGroup parent) {
        Bitmap bitmap = getItem(position);
RelativeLayout userListItem = new RelativeLayout(getContext());
 
LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(mResourceId, userListItem,true);
ImageView image = (ImageView) view.findViewById(R.id.cameraImage);
image.setImageBitmap(bitmap);
        return view;
}
    }

public class 
 
EnterpriseListAdapter extends ArrayAdapter<EnterpriseInfo>{
    private int resourceId;
    public EnterpriseListAdapter(Context context, int resource, List<EnterpriseInfo> objects) {
        super(context, resource, objects);
        this.resourceId = resource;
}


    @Override
public View getView(int position, View convertView, ViewGroup parent) {
        EnterpriseInfo enterprise = getItem(position);
View view;
ViewHolder holder;
        if(convertView == null){
            view = LayoutInflater.from(getContext()).inflate(resourceId,null);
holder = new ViewHolder();
holder.enterpriceName = (TextView) view.findViewById(R.id.ent_info_name);
holder.person = (TextView) view.findViewById(R.id.tv_person);
holder.address = (TextView) view.findViewById(R.id.tv_address);
view.setTag(holder);
}else{
            view = convertView;
holder = (ViewHolder) view.getTag();
}

        holder.enterpriceName.setText(enterprise.getCompanyName());
holder.person.setText(enterprise.getPerson());
holder.address.setText(enterprise.getAddress());
        return view;
}

    class ViewHolder{
        TextView enterpriceName;
TextView person;
TextView address;
}

NULLPointException:

 1. 在對控制元件例項化的時候經常忘寫view.findViewById。

 2. inflate(resourceId,null)------有時會寫成R.layout佈局檔案。

RuntimeException: android.widget.LinearLayout cannot be cast to android.widget.TextView

 1.每次重寫getView()方法時，系統會預設給出super(); -------解決辦法：需要去除這行。。