RecyclerView实现ListView与GridView

MainActivity

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private Button list,grid;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initListener();
    }



    private void initView() {
        list=(Button)findViewById(R.id.btn_list);
        grid=(Button)findViewById(R.id.btn_grid);

    }

    private void initListener() {
        list.setOnClickListener(this);
        grid.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_list:
                Intent intent=new Intent(MainActivity.this,RecyclerViewActivity.class);
                intent.putExtra("type",1);
                startActivity(intent);
                break;
            case R.id.btn_grid:
                Intent intent2=new Intent(MainActivity.this,RecyclerViewActivity.class);
                intent2.putExtra("type",2);
                startActivity(intent2);
                break;
        }

    }
}

RecyclerViewActivity

public class RecyclerViewActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;

    private String[] title = {"Blog : http://blog.csdn.net/Leejizhou.",
            "A good laugh and a long sleep are the best cures in the doctor's book.",
            "all or nothing, now or never ",
            "Be nice to people on the way up, because you'll need them on your way down.",
            "Be confident with yourself and stop worrying what other people think. Do what's best for your future happiness!",
            "Blessed is he whose fame does not outshine his truth.",
            "Create good memories today, so that you can have a good past"
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recyclerview);
        mRecyclerView = (RecyclerView) findViewById(R.id.rv_list);

        if (getIntent().getIntExtra("type", 0) == 1) {

            LinearLayoutManager layoutManager = new LinearLayoutManager(this);
            layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
            mRecyclerView.setLayoutManager(layoutManager);

        } else if (getIntent().getIntExtra("type", 0) == 2) {

            mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));
        }

        mRecyclerView.setAdapter(new RecyclerViewAdapter(this, title));


    }
}

RecyclerViewAdapter

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private LayoutInflater mLayoutInflater;
    private Context context;
    private String [] titles;
    //建立枚举 2个item 类型
    public enum ITEM_TYPE {
        ITEM1,
        ITEM2
    }

    public RecyclerViewAdapter(Context context,String[] titles){
        this.titles = titles;
        this.context = context;
        mLayoutInflater = LayoutInflater.from(context);
    }


    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//加载Item View的时候根据不同TYPE加载不同的布局
        if (viewType == ITEM_TYPE.ITEM1.ordinal()) {
            return new Item1ViewHolder(mLayoutInflater.inflate(R.layout.item1, parent, false));
        } else {
            return new Item2ViewHolder(mLayoutInflater.inflate(R.layout.item2, parent, false));
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof Item1ViewHolder) {
            ((Item1ViewHolder) holder).mTextView.setText(titles[position]);
        } else if (holder instanceof Item2ViewHolder) {
            ((Item2ViewHolder) holder).mTextView.setText(titles[position]);
        }
    }

    //设置ITEM类型，可以自由发挥，这里设置item position单数显示item1 偶数显示item2
    @Override
    public int getItemViewType(int position) {
        //Enum类提供了一个ordinal()方法，返回枚举类型的序数，这里ITEM_TYPE.ITEM1.ordinal()代表0， ITEM_TYPE.ITEM2.ordinal()代表1
        return position % 2 == 0 ? ITEM_TYPE.ITEM1.ordinal() : ITEM_TYPE.ITEM2.ordinal();
    }

    @Override
    public int getItemCount() {
        return titles == null ? 0 : titles.length;
    }

    //item1 的ViewHolder
    public static class Item1ViewHolder extends RecyclerView.ViewHolder{
        TextView mTextView;
        public Item1ViewHolder(View itemView) {
            super(itemView);
            mTextView=(TextView)itemView.findViewById(R.id.tv_item1_text);
        }
    }
    //item2 的ViewHolder
    public static class Item2ViewHolder extends RecyclerView.ViewHolder{

        TextView mTextView;
        public Item2ViewHolder(View itemView) {
            super(itemView);
            mTextView=(TextView)itemView.findViewById(R.id.tv_item2_text);
        }
    }
}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.bwie.recycleview_testdemo.activity.MainActivity">


    <Button
        android:id="@+id/btn_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:text="List" />

    <Button
        android:id="@+id/btn_grid"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:text="Grid" />
LinearLayout>

activity_recyclerview.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/rv_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
LinearLayout>

item1.xml

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/cv_item"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    android:foreground="?android:attr/selectableItemBackground"
    card_view:cardBackgroundColor="#ffffff"
    card_view:cardCornerRadius="4dp"
    card_view:cardElevation="4dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/iv_item1_pic"
            android:layout_width="match_parent"
            android:layout_height="120dp"
            android:layout_weight="1"
            android:background="@mipmap/ic_launcher" />

        <TextView
            android:id="@+id/tv_item1_text"
            android:layout_width="match_parent"

            android:layout_height="wrap_content"
            android:padding="20dp" />
    LinearLayout>

android.support.v7.widget.CardView>

item2.xml

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="8dp"
    android:foreground="?android:attr/selectableItemBackground"
    card_view:cardCornerRadius="4dp"
    card_view:cardBackgroundColor="#E040FB"
    card_view:cardElevation="4dp"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >

        <TextView
            android:id="@+id/tv_item2_text"
            android:padding="20dp"
            android:textColor="#ffffff"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
    LinearLayout>

android.support.v7.widget.CardView>