建議：

public class MyAdapter extends BaseAdapter{
    private List<ItemBean> mList;//數據源
    private LayoutInflater mInflater;//布局裝載器對象

    // 通過構造方法將數據源與數據適配器關聯起來
    // context:要使用當前的Adapter的界面對象
    public MyAdapter(Context context, List<ItemBean> list) {
        mList = list;
        mInflater = LayoutInflater.from(context);
    }

    @Override
    //ListView需要顯示的數據數量
    public int getCount() {
        return mList.size();
    }

    @Override
    //指定的索引對應的數據項
    public Object getItem(int position) {
        return mList.get(position);
    }

    @Override
    //指定的索引對應的數據項ID
    public long getItemId(int position) {
        return position;
    }

    @Override
    //返回每一項的顯示內容
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        //如果view未被實例化過，緩存池中沒有對應的緩存
        if (convertView == null) {
            viewHolder = new ViewHolder();
            // 由于我們只需要將XML轉化為View，并不涉及到具體的布局，所以第二個參數通常設置為null
            convertView = mInflater.inflate(R.layout.item, null);

            //對viewHolder的屬性進行賦值
            viewHolder.imageView = (ImageView) convertView.findViewById(R.id.iv_image);
            viewHolder.title = (TextView) convertView.findViewById(R.id.tv_title);
            viewHolder.content = (TextView) convertView.findViewById(R.id.tv_content);

            //通過setTag將convertView與viewHolder關聯
            convertView.setTag(viewHolder);
        }else{//如果緩存池中有對應的view緩存，則直接通過getTag取出viewHolder
            viewHolder = (ViewHolder) convertView.getTag();
        }
        // 取出bean對象
        ItemBean bean = mList.get(position);

        // 設置控件的數據
        viewHolder.imageView.setImageResource(bean.itemImageResId);
        viewHolder.title.setText(bean.itemTitle);
        viewHolder.content.setText(bean.itemContent);

        return convertView;
    }
    // ViewHolder用于緩存控件，三個屬性分別對應item布局文件的三個控件
    class ViewHolder{
        public ImageView imageView;
        public TextView title;
        public TextView content;
    }

MyAdapter1 myAdapter=new MyAdapter1(getContext(),list);
        listView.setAdapter(myAdapter);
        //設置listview點擊事件
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(getActivity(),""+i,Toast.LENGTH_LONG).show();
            }
        });
        listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener(){
            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                // TODO Auto-generated method stub
                // When clicked, show a toast with the TextView text
                Toast.makeText(getActivity(), "2131"+arg2+"--"+arg3, Toast.LENGTH_SHORT).show();
                return false;
            }
        });

不建議：

import android.content.Context;
import android.database.DataSetObserver;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.SpinnerAdapter;
import android.widget.TextView;

import com.exam_assistant.R;

public class MyAdapter extends BaseAdapter {
    private Context mContext;
    private String data[];

    public MyAdapter(Context mContext, String[] data) {
        this.mContext = mContext;
        this.data = data;
    }

    public MyAdapter(Context mContext) {
        this.mContext = mContext;
    }

    @Override
    public int getCount() {
        return data.length;
    }

    @Override
    public Object getItem(int position) {
        return data[position];
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view;
        if (convertView == null) {
            view = LayoutInflater.from(mContext).inflate(R.layout.layout_ltem_practice, parent, false);
            TextView textView = view.findViewById(R.id.ltem);
            textView.setText(data[position]);
            Log.d("456", "新建的item: " + position);
        } else {
            view = convertView;
            Log.d("123", "回收的item" + position);
        }
        return view;
    }
}