1.简介
RecyclerView是一种新的视图组，目标是为任何基于适配器的视图提供相似的渲染方式。它被作为ListView和GridView控件的继承者，在最新的support-V7版本中提供支持。RecyclerView架构，提供了一种插拔式的体验，高度的解耦，异常的灵活，通过设置它提供的不同LayoutManager，ItemDecoration , ItemAnimator实现令人瞠目的效果。
总之ListView和GridView能做的RecyclerView都能做，并且能实现瀑布流效果
2.使用
在build.gradle配置RecyclerView的库
compile 'com.android.support:recyclerview-v7:23.3.0'
//设置RecyclerView的适配器 adapter = new MyRecyclerViewAdapter(RecyclerViewActivity.this,datas); recyclerview.setAdapter(adapter); //LayoutManager recyclerview.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{ private final Context context; private final ArrayList datas; public MyAdapter(Context context,ArrayList 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); } } }
3.设置ListView&GridView&瀑布流类型效果
//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));
4.分割线
参照网址：http://blog.csdn.net/lmj623565791/article/details/45059587
//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
设置分割线样式：
①application设置
②在activity中
5.自定义设置item的点击事件
RecyclerView默认是没有点击事件的，需要自定义点击事件
用到知识点：接口，getLayoutPosition()
public class MyAdapter extends RecyclerView.Adapter{ private final Context context; private final ArrayList 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()); } } }); } } }
在Activity中使用自定义的点击事件
//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();
}
});
6.删除和增加数据
1_在适配器中新增加添加和删除两个方法
public class MyAdapter extends RecyclerView.Adapter{ ........................ public void addData(int position,String content){ datas.add(position,content); notifyItemInserted(position); } public void removeData(int position){ datas.remove(position); notifyItemRemoved(position); } }
2_Activity中
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);
}
});
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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