RecyclerView的入门使用

RecyclerView是listview的替代品，在V7包里面。listview有的，recyclerview全都有，并且灵活性非常强，同时可以实现glid的多行与多列。recyclerview并没有实现添加addHeadview功能，但是我们可以封装一个headerview，这个百度上大把。recyclerview的横向列表非常方便，只要三句代码就可以了。话不多说，直接上代码。

先写一个界面：

public class VerticalRcActivity extends AppCompatActivity {    private RecyclerView recyclerView;    private CarBrandAdapter carBrandAdapter;    private String[] brands;    private static final int ADD_CAR_BRAND_REQUEST = 5002;    private static final int ADD_CAR_BRAND_RESULT = 5003;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_vertical_rc);        brands = getResources().getStringArray(R.array.car_brand);        recyclerView = (RecyclerView)findViewById(R.id.vertical_rc_recyclerview);        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);        recyclerView.addItemDecoration(new RecyclerViewDivider(this,LinearLayoutManager.HORIZONTAL,1, ContextCompat.getColor(this,R.color.colorPrimaryDark)));        recyclerView.setLayoutManager(linearLayoutManager);        carBrandAdapter = new CarBrandAdapter(this,brands,handler);        recyclerView.setAdapter(carBrandAdapter);        LinearLayoutManager linearLayoutManager1 = new LinearLayoutManager(this);        linearLayoutManager1.setOrientation(LinearLayoutManager.HORIZONTAL);    }    Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what){                case 0:                    Intent intent = new Intent();                    intent.putExtras(msg.getData());                    setResult(ADD_CAR_BRAND_RESULT,intent);                    finish();                    break;                case 1:                    break;                default:                    break;            }        }    };}

再写一个适配器：

package project.mygithub.com.myapplication;/** * 系统消息适配器. */import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import android.widget.Toast;/** * Created by Administrator on 2016/7/1. */public class CarBrandAdapter extends RecyclerView.Adapter<CarBrandAdapter.ViewHolder> {    private LayoutInflater layoutInflater;    private Activity activity;    private String[] brands;    private Handler handler;    public CarBrandAdapter(Activity activity, String[] brands, Handler handler){        this.activity = activity;        layoutInflater = LayoutInflater.from(this.activity);        this.brands = brands;        this.handler = handler;    };    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = layoutInflater.inflate(R.layout.item_car_brand,parent,false);        ViewHolder viewHolder = new ViewHolder(view);        return viewHolder;    }    @Override    public void onBindViewHolder(ViewHolder holder, final int position) {        holder.brandNameTv.setText(brands[position]);        holder.brandNameTv.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Toast.makeText(activity,"点击了" + position,Toast.LENGTH_SHORT).show();                Bundle bundle = new Bundle();                bundle.putString("carBrand",brands[position]);                Message message = Message.obtain();                message.what = 0;                message.setData(bundle);                handler.sendMessage(message);            }        });        holder.brandNameTv.setOnLongClickListener(new View.OnLongClickListener() {            @Override            public boolean onLongClick(View view) {                Toast.makeText(activity,"长按了" + position,Toast.LENGTH_SHORT).show();                return false;            }        });    }    @Override    public int getItemCount() {        return brands.length;    }    public class ViewHolder extends RecyclerView.ViewHolder{        TextView brandNameTv;        public ViewHolder(View itemView) {            super(itemView);            brandNameTv = (TextView)itemView.findViewById(R.id.brand_name);        }    }}

实现横向滚动列表的话只需要把

linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);改成
linearLayoutManager1.setOrientation(LinearLayoutManager.HORIZONTAL);
具体请看github: