Android RecyclerView使用方法解析

//设置RecyclerView的适配器adapter = new MyRecyclerViewAdapter(RecyclerViewActivity.this,datas);recyclerview.setAdapter(adapter); //LayoutManagerrecyclerview.setLayoutManager(new LinearLayoutManager(RecyclerViewActivity.this, LinearLayoutManager.VERTICAL, false));// recyclerview.scrollToPosition(datas.size()-1); //添加RecyclerView的分割线recyclerview.addItemDecoration(new DividerListItemDecoration(RecyclerViewActivity.this,DividerListItemDecoration.VERTICAL_LIST)); //设置动画recyclerview.setItemAnimator(new DefaultItemAnimator());

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {  private final Context context; private final ArrayList<String> datas;  public MyAdapter(Context context,ArrayList<String> datas){ this.context = context; this.datas = datas; } /** * 相当于ListView适配器中的getView的创建holder布局 * * @param parent * @param viewType * @return */ @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = View.inflate(context, R.layout.item_hello, null); return new MyViewHolder(view); }  @Override public void onBindViewHolder(MyViewHolder holder, int position) { holder.tv_text.setText(datas.get(position)); holder.iv_icon.setBackgroundResource(R.mipmap.ic_launcher);  }  @Override public int getItemCount() { return datas.size(); }  class MyViewHolder extends RecyclerView.ViewHolder {  private TextView tv_text; private ImageView iv_icon;  public MyViewHolder(View itemView) {  super(itemView);  tv_text = (TextView) itemView.findViewById(R.id.tv_text);  iv_icon = (ImageView) itemView.findViewById(R.id.iv_icon);  } }}

//设置List类型效果recyclerview.setLayoutManager(new LinearLayoutManager(RecyclerViewActivity.this,LinearLayoutManager.VERTICAL,false)); //设置Grid类型效果recyclerview.setLayoutManager(new GridLayoutManager(RecyclerViewActivity.this, 2, GridLayoutManager.VERTICAL, false));//recyclerview.scrollToPosition(99); //设置瀑布流类型效果recyclerview.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));

//设置分割线-分割线需要自定义&还可以自定义分割线的样式//没有提供默认的分割线recyclerview.addItemDecoration(new DividerListItemDecoration(this, DividerListItemDecoration.VERTICAL_LIST));

public class DividerListItemDecoration 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 DividerListItemDecoration(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.e("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);  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); } }}DividerListItemDecoration

<!-- Base application theme. --><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> <item name="android:listDivider">@drawable/divider_bg</item></style>

<activity android:name=".recyclerview.RecyclerViewActivity" android:theme="@style/listDividerTheme"/><style name="listDividerTheme" 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> <item name="android:listDivider">@drawable/divider_bg</item></style>

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{  private final Context context; private final ArrayList<String> datas;  //设置点击某个item的监听 public interface OnItemClickListener{  void onItemClick(View view,int position,String content); }  private OnItemClickListener onItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener) { this.onItemClickListener = onItemClickListener; }  //设置点击图片 public interface OnImageViewClickListener{ void onImageViewClick(View view,int position); }  private OnImageViewClickListener onImageViewClickListener; public void setOnImageViewClickListener(OnImageViewClickListener onImageViewClickListener) { this.onImageViewClickListener = onImageViewClickListener; }  ...................................  class MyViewHolder extends RecyclerView.ViewHolder {  private TextView tv_text; private ImageView iv_icon;  public MyViewHolder(View itemView) {  super(itemView);  tv_text = (TextView) itemView.findViewById(R.id.tv_text);  iv_icon = (ImageView) itemView.findViewById(R.id.iv_icon);   //设置点击事件  itemView.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {   if(onItemClickListener != null){   onItemClickListener.onItemClick(v,getLayoutPosition(),datas.get(getLayoutPosition()));   }  }  });   //设置监听  iv_icon.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {   if(onImageViewClickListener != null){   onImageViewClickListener.onImageViewClick(v,getLayoutPosition());   }  }  }); } }}

//设置点击item的点击事件myAdapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() { @Override public void onItemClick(View view, int position, String content) { Toast.makeText(RecyclerViewActivity.this, "content=="+content+",--position=="+position, Toast.LENGTH_SHORT).show(); }}); //设置点击某张图片的点击事件myAdapter.setOnImageViewClickListener(new MyAdapter.OnImageViewClickListener() { @Override public void onImageViewClick(View view, int position) { Toast.makeText(RecyclerViewActivity.this, "position=="+position+",view=="+view.toString(), Toast.LENGTH_SHORT).show(); }});

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {  ........................  public void addData(int position,String content){ datas.add(position,content); notifyItemInserted(position); }  public void removeData(int position){ datas.remove(position); notifyItemRemoved(position); }}

btn_add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { myAdapter.addData(0,"Content NetData"); //定位到第0个位置 recyclerview.scrollToPosition(0); }}); btn_remove.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { myAdapter.removeData(0); }});