Recyclerview的简单使用

[code]  主布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
    >
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:scrollbars="none"
        />
</RelativeLayout>

  Item 布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">
        <ImageView
            android:id="@+id/item_iamge"
            android:layout_width="74dp"
            android:layout_height="74dp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:scaleType="center"
            />
       <TextView
           android:id="@+id/item_text"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_below="@id/item_iamge"
           android:layout_centerHorizontal="true"
           android:layout_marginTop="5dp"
           android:layout_marginBottom="5dp"
           android:textColor="#000000"
           android:text="test"
           android:textSize="13sp"
           />

</RelativeLayout>

  MyTestRecyclerview:

public class MyTestRecyclerview extends AppCompatActivity {

    private RecyclerView recycler;

    private RecyclerAdapter recyclerAdapter;

    private List<Integer> date;

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

        recycler = (RecyclerView) findViewById(R.id.recycler);
        //设置布局管理器
        GridLayoutManager linearLayoutManager = (GridLayoutManager) new GridLayoutManager(this, 3);
//          LinearLayoutManager linearLayoutManager = (LinearLayoutManager) new LinearLayoutManager(this);
//        StaggeredGridLayoutManager linearLayoutManager=new  StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);
        linearLayoutManager.setOrientation(GridLayoutManager.HORIZONTAL);

        recycler.setLayoutManager(linearLayoutManager);
        //设置适配器
        recyclerAdapter = new RecyclerAdapter(this, date);
        recyclerAdapter.OnItemClickLitener(new RecyclerAdapter.OnItemClickLitener() {
            @Override
            public void onItemClick(View view, int position) {

                Toast.makeText(MyTestRecyclerview.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });
        //设置item增加或者删除的动画
        recycler.setItemAnimator(new DefaultItemAnimator());
        //设置Item分割线
        recycler.addItemDecoration(new DividerItemDecoration(
                this, DividerItemDecoration.VERTICAL_LIST));
        recycler.setAdapter(recyclerAdapter);

    }

    private void init() {
        date = new ArrayList<Integer>(Arrays.asList(R.mipmap.ic_launcher, R.mipmap.ic_launcher,
                R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher));
    }

}

  DividerItemDecoration: 网上找的 复制过来用的、

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;

    private int mOrientation;

    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) {

        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);
            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.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);
        }
    }

    @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);
        }
    }