android朋友圈九宫格用Recyclerview实现

//效果图

//话不多说,代码先给上关键代码
if (StringUtils.isEmpty(list.get(position).getImage())) {
holder.gridView.setVisibility(View.GONE);
} else {
holder.gridView.setVisibility(View.VISIBLE);
String[] images = list.get(position).getImage().split(",");
int imageCount = images.length;
int colNum;//列数
if (imageCount == 1) {
colNum = 1;
ViewGroup.LayoutParams layoutParams = holder.linyout_recyc.getLayoutParams();
layoutParams.height = (int) context.getResources().getDimension(R.dimen.dp_250);
layoutParams.width = (int) context.getResources().getDimension(R.dimen.dp_250);
} else if (imageCount == 2 || imageCount == 4) {
colNum = 2;
} else {
colNum = 3;
}
holder.imageAdapter.clear();//清空
holder.imageAdapter.addStringListAll(Arrays.asList(images));
holder.imageAdapter.addAoo(list.get(position));
holder.gridLayoutManager.setSpanCount(colNum);//设置列数
holder.imageAdapter.notifyDataSetChanged();
}
//在item获取id写
gridView = itemView.findViewById(R.id.recyc_view);
imageAdapter = new ImageAdapter(context);
int space = context.getResources().getDimensionPixelSize(R.dimen.dp_10);
gridLayoutManager = new GridLayoutManager(context, 3);
gridView.addItemDecoration(new SpacingItemDecoration(space));
gridView.setLayoutManager(gridLayoutManager);
gridView.setAdapter(imageAdapter);
//图片的适配器
public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.MyHodler> {

private List<Object> mList = new ArrayList<>();
private List<DynamBean> beanList = new ArrayList<>();
private int sign;//0:普通点击，1自定义
private Context context;
public void addAll(List<Object> list) {
    mList.addAll(list);
}
public void addStringListAll(List<String> list) {
    mList.addAll(list);
}

public ImageAdapter(Context context) {
    this.context = context;
}

public void setSign(int sign){
    this.sign = sign;
}


@NonNull
@Override
public MyHodler onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = View.inflate(viewGroup.getContext(), R.layout.circle_image_item, null);
    return new MyHodler(view);
}

@Override
public void onBindViewHolder(@NonNull MyHodler myHodler, final int position) {
    if (mList.get(position) instanceof String) {
        String imageUrl = (String) mList.get(position);

        if (imageUrl.startsWith("http:")||imageUrl.startsWith("https:")) {//加载http
            myHodler.image.setImageURI(Uri.parse(imageUrl));
        } else {//加载sd卡
            Uri uri = Uri.parse("file://" + imageUrl);
            myHodler.image.setImageURI(uri);
        }
    } else {//加载资源文件
        int id = (int) mList.get(position);
        Uri uri = Uri.parse("res://com.dingtao.rrmmp/" + id);
        myHodler.image.setImageURI(uri);
    }
    myHodler.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (sign == 1) {//自定义点击
                if (position == 0) {
                    Intent intent = new Intent(
                            Intent.ACTION_PICK,
                            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    WDActivity.getForegroundActivity().startActivityForResult(intent, WDActivity.PHOTO);
                } else {

                }
            }else{
                Intent intent = new Intent(context, CommentdetailsActivity.class);
                intent.putExtra("dyname",beanList.get(0));
                context.startActivity(intent);
            }
        }
    });
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public int getItemCount() {
    return mList.size();
}

public void clear() {
    mList.clear();
}

public void add(Object image) {
    if (image != null) {
        mList.add(image);
    }
}

public List<Object> getList() {
    return mList;
}

public void addAoo(DynamBean dynamBean) {
    beanList.add(dynamBean);
}


class MyHodler extends RecyclerView.ViewHolder {
    SimpleDraweeView image;

    public MyHodler(@NonNull View itemView) {
        super(itemView);
        image = itemView.findViewById(R.id.circle_image);
    }
}

}
//好了到这,不用谢我