RecyclerView的使用方法

1.添加.jar包

File -> Project-Structure -> 左下角 “app” -> Dependencies -> 右上角“+” -> File dependency -> 选择“com.android.support:recyclerview-v7:23.1.0”

然后在“build-gradle”里面看到“compile ’com.android.support:recyclerview-v7:23.1.0‘”，如果不行，直接复制这句话到这里

MainActivity.java

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private List<String> mData;
    private MyAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initData();
        initView();

        mAdapter = new MyAdapter(this,mData);
        mRecyclerView.setAdapter(mAdapter);

        //AS自带的动画效果
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());

        //设置RecyclerView的布局管理
        LinearLayoutManager manager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
        mRecyclerView.setLayoutManager(manager);

        //设置RecyclerView的Item间分割线
        //直接在item.xml文件中设置android:layout_margin="6dp"取代这句话
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));

        mAdapter.onViewItemClickListener(new MyAdapter.onViewItemClick() {
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText(MainActivity.this,"Click : "+position,Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onItemLongClick(View view, int position) {
                Toast.makeText(MainActivity.this,"Long Click : "+position,Toast.LENGTH_SHORT).show();
                mAdapter.itemRemove(position);
            }
        });
    }

    private void initData(){

        mData = new ArrayList<String>();
        for (int i = 'A';i <= 'z';i++) {
            mData.add(" "+(char)i);
        }
    }

    private void initView() {
        mRecyclerView = (RecyclerView) findViewById(R.id.rv_recycler);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_add:
                mAdapter.itemAdd(1);
                break;
            case R.id.action_delete:
                mAdapter.itemRemove(1);
                break;

            case R.id.action_diary:
                mRecyclerView.setLayoutManager(new GridLayoutManager(this,3));
                break;
            case R.id.action_catalog:
                mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
                break;
            case R.id.action_more:
                mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL));
                break;
            case R.id.action_demo:
                Intent intent = new Intent(MainActivity.this,StraggedGridViewActivity.class);
                startActivity(intent);
        }
        return super.onOptionsItemSelected(item);
    }
}

MyAdapter.java

public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
    private List<String> mData;
    private LayoutInflater mInflater;
    private Context mContext;

    private onViewItemClick onViewItemClickListener;

    public void onViewItemClickListener(onViewItemClick listener){
        this.onViewItemClickListener = listener;
    }

    public MyAdapter(Context context,List<String> data) {
        this.mContext = context;
        this.mData = data;
        this.mInflater = LayoutInflater.from(context);
    }

    //创建ViewHolder
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.item,parent,false);
        MyViewHolder viewHolder = new MyViewHolder(view);

        return viewHolder;
    }

    //绑定ViewHolder
    //final是自动添加上去的
    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        holder.tv.setText(mData.get(position));

        /*if (onViewItemClickListener != null) {
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onViewItemClickListener.onItemClick(holder.itemView,position);
                }
            });
        }*/

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //直接position不会刷新位置信息
                int layoutPosition = holder.getLayoutPosition();
                //onViewItemClickListener.onItemClick(holder.itemView,position);
                onViewItemClickListener.onItemClick(holder.itemView,layoutPosition);
            }
        });

        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                int layoutPosition = holder.getLayoutPosition();
                onViewItemClickListener.onItemLongClick(holder.itemView,layoutPosition);
                return false;
            }
        });
    }

    @Override
    public int getItemCount() {
        //return 0;
        return mData.size();
    }

    //自定义添加item方法
    public void itemAdd(int position) {
        //不是notifyItemChanged(),这是把position位置的给取代了
        mData.add(position, "SSS");
        notifyItemInserted(position);
        //notifyItemChanged(position);
    }

    //自定义删除item方法
    public void itemRemove(int position) {
        mData.remove(position);
        notifyItemRemoved(position);
    }

    //监听点击事件的接口
    public interface onViewItemClick {
        void onItemClick(View view, int position);
        void onItemLongClick(View view, int position);
    }

}

//MyViewHolder拥有所有item.xml的控件
class MyViewHolder extends RecyclerView.ViewHolder {
    //tv不能是private，因为MyAdapter类中的onBindViewHolder()要调用
    TextView tv;

    public MyViewHolder(View itemView) {
        super(itemView);
        tv = (TextView) itemView.findViewById(R.id.tv_text);
    }
}

StraggedGridViewActivity.java

public class StraggedGridViewActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private List<String> mData;
    private StraggedGridViewAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_stragged_grid_view);

        initData();
        initView();

        mAdapter = new StraggedGridViewAdapter(this,mData);
        mRecyclerView.setAdapter(mAdapter);

        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));
    }

    private void initData(){
        mData = new ArrayList<String>();
        for (int i = 'A';i <= 'z';i++) {
            mData.add(" "+(char)i);
        }
    }

    private void initView() {
        mRecyclerView = (RecyclerView) findViewById(R.id.rv_recycler);
    }
}

StraggedGridViewAdapter.java

public class StraggedGridViewAdapter extends RecyclerView.Adapter<MyViewHolder2> {
    private List<String> mData;
    private LayoutInflater mInflater;
    private Context mContext;

    private List<Integer> mHeight;

    public StraggedGridViewAdapter(Context context,List<String> data) {
        this.mContext = context;
        this.mData = data;
        this.mInflater = LayoutInflater.from(context);

        mHeight = new ArrayList<Integer>();
        for (int i = 0;i <mData.size();i++) {
            mHeight.add((int) (100+Math.random()*300));
        }
    }

    //创建ViewHolder
    @Override
    public MyViewHolder2 onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.item,parent,false);
        MyViewHolder2 viewHolder = new MyViewHolder2(view);

        return viewHolder;
    }

    //绑定ViewHolder
    @Override
    public void onBindViewHolder(MyViewHolder2 holder, int position) {
        //动态高度的设置
        ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();
        lp.height = mHeight.get(position);
        holder.itemView.setLayoutParams(lp);
        holder.tv.setText(mData.get(position));
    }

    @Override
    public int getItemCount() {
        //return 0;
        return mData.size();
    }
}

//MyViewHolder拥有所有item.xml的控件
class MyViewHolder2 extends RecyclerView.ViewHolder {
    //tv不能是private，因为MyAdapter类中的onBindViewHolder()要调用
    TextView tv;

    public MyViewHolder2(View itemView) {
        super(itemView);
        tv = (TextView) itemView.findViewById(R.id.tv_text);
    }
}

DividerItemDecoration.java    //这是分割线，可以不要，在divider.xml和styles.xml里面可以取代

public class DividerItemDecoration extends RecyclerView.ItemDecoration
{

    private static final int[] ATTRS = new int[] { android.R.attr.listDivider };

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;

    private Drawable mDivider; //item间间隔图片资源

    private int mOrientation;  //方向:水平，垂直

    public DividerItemDecoration(Context context, int orientation)
    {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation(int orientation)
    {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST)
        {
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent)
    {
        //Log.v("recyclerview - itemdecoration", "onDraw()");
         if (mOrientation == VERTICAL_LIST) {
                drawVertical(c, parent);
            } else {
                drawHorizontal(c, parent);
            }
    }

    public void drawVertical(Canvas c, RecyclerView parent)
    {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();

        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);
            RecyclerView v = new RecyclerView(
                    parent.getContext());
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent)
    {
        final int top = parent.getPaddingTop();
        final int bottom = parent.getHeight() - parent.getPaddingBottom();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++)
        {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    //提供绘制分割线的间隙
    @Override
    public void getItemOffsets(Rect outRect, int itemPosition,
            RecyclerView parent)
    {
        if (mOrientation == VERTICAL_LIST)
        {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else
        {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}

main_activity.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_recycler"
        android:layout_height="match_parent"
        android:layout_width="match_parent"/>
</RelativeLayout>

activity_stragged_grid_view.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="my.com.example.x550v.recyclerviewdemo.StraggedGridViewActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_recycler"
        android:layout_height="match_parent"
        android:layout_width="match_parent"/>

</RelativeLayout>

item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/button"
    android:layout_marginTop="8dp"
    android:layout_marginBottom="8dp"
    android:layout_marginRight="5dp"
    android:layout_marginLeft="5dp"
    android:orientation="vertical">
    <TextView
        android:id="@+id/tv_text"
        android:gravity="center"
        android:textColor="#fff"
        android:textSize="20sp"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

divider.xml

<!--写完后要在styles里面声明-->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <size android:height="4dp"/>
    <gradient
        android:startColor="#000"
        android:centerColor="#fff"
        android:endColor="#fff"
        android:type="linear"/>
</shape>

buttom.xml

<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:state_pressed="false">
        <shape
            android:shape="rectangle">
            <gradient
                android:angle="45"
                android:centerX="35%"
                android:centerColor="#43D2E8"
                android:startColor="#43D2E8"
                android:endColor="#000000"
                android:type="linear"
                />
        </shape>
    </item>

    <item
        android:state_pressed="true"
        >
        <shape
            android:shape="rectangle">
            <gradient
                android:angle="45"
                android:centerX="35%"
                android:centerColor="#B3DDE8"
                android:startColor="#43D2E8"
                android:endColor="#000000"
                android:type="linear"
                />
        </shape>
    </item>

</selector>

menu.xml

<menu
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="my.com.example.x550v.recyclerviewdemo.MainActivity">

    <item
        android:id="@+id/action_add"
        android:title="Add"
        android:icon="@android:drawable/ic_media_play"
        app:showAsAction="ifRoom"/>

    <item
        android:id="@+id/action_delete"
        android:title="Add"
        android:icon="@android:drawable/ic_media_pause"
        app:showAsAction="ifRoom"/>

    <item
        android:id="@+id/action_both"
        android:title="action"
        android:icon="@android:drawable/ic_input_add"
        app:showAsAction="ifRoom|collapseActionView">

        <menu>
            <item
                android:id="@+id/action_diary"
                android:title="GirdView"
                android:icon="@android:drawable/ic_menu_save"
                app:showAsAction="ifRoom"/>
            <item
                android:id="@+id/action_catalog"
                android:title="LinearView"
                android:icon="@android:drawable/ic_menu_sort_by_size"
                app:showAsAction="ifRoom"/>
            <item
                android:id="@+id/action_more"
                android:title="StaggeredGridView"
                android:icon="@android:drawable/ic_menu_myplaces"
                app:showAsAction="ifRoom"/>
            <item
                android:id="@+id/action_demo"
                android:title="StaggeredGridDemoView"
                android:icon="@android:drawable/ic_menu_mapmode"
                app:showAsAction="ifRoom"/>
        </menu>
    </item>

</menu>

styles.xml

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <!--设置分割线-->
        <item name="android:listDivider">@drawable/diver</item>

    </style>

运行效果：