ListView适配器的封装

copy可直接用，废话不多说。

1.封装：

/**
 * Created by Administrator on 2018/9/1.
 */
public abstract class BaseAdapter<A> extends android.widget.BaseAdapter {

    private Context context;
    private List<A> list;

    public BaseAdapter(Context context) {
        this.context = context;
    }

    public void setList(List<A> list) {
        this.list = list;
        notifyDataSetChanged();
    }

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

    @Override
    public Object getItem(int position) {
        return list.get(position) == null ? 0 : list.size();
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        baseHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.layout_test, parent, false);
            holder = new baseHolder(convertView);
            convertView.setTag(holder);
        } else {
            holder = (baseHolder) convertView.getTag();
        }
        holder.bindview(list.get(position));
        return convertView;
    }

    class baseHolder extends RecyclerView.ViewHolder {

        @BindView(R.id.text)
        TextView text;

        public baseHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }

        public void bindview(A a) {
            bind(this,a);
        }
    }

    public abstract void bind(baseHolder holder,A a);
}

2.继承使用：

/**
 * Created by Administrator on 2018/9/1.
 */
public class MyAdapter extends BaseAdapter<test> {

    public MyAdapter(Context context) {
        super(context);
    }

    @Override
    public void bind(baseHolder holder, test test) {
        holder.text.setText(test.getName());
    }
}

3.test:

/**
 * Created by Administrator on 2018/9/1.
 */
public class test {
    private String name="hello world !";

    public test(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

4.Activity中使用：

/**
 * Created by Administrator on 2018/9/1.
 */
public class MyActivity extends AppCompatActivity {

    @BindView(R.id.list_item)
    ListView listItem;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        inti();
    }

    private void inti() {
        List<test> list = new ArrayList<>();
        for (int i = 0; i < 20; i++) {
            list.add(new test(i + ".I like android !"));
        }
        MyAdapter adapter = new MyAdapter(this);
        adapter.setList(list);
        listItem.setAdapter(adapter);
    }
}

end...