我有一个recyclerView，其中包含三种视图；在视图类型2中，我正在检查文件是否在内部存储器上退出，因此我从存储器中加载了文件，以及 我不是在视图中心显示一个小的图像视图来下载它。当用户单击下载图像视图时，图像从下载图标更改为暂停图标，但是其他一些行会发生这种情况...
该问题的主要公认答案是
2。覆盖此方法
@Override public long getItemId(int position) {
return position; }
@Override public int getItemViewType(int position) {
return position; }
和我的代码
@Override
public int getItemViewType(int position) {
int type = messages.get(position).getType();
if (type==1) {
return 1;
}else if (type==2) {
return 2 ;
}else if (type==3) {
return 3;
}
else {
return -1;
}
}
@Override
public long getItemId(int position) {
return position;
}
4。在onBindViewHolder中编写if和else条件
switch (holder.getItemViewType()) {
case 1 :
SimpleHolder simpleHolder = (SimpleHolder)holder;
simpleHolder.tv_text.setText(message.getMessage());
simpleHolder.tv_time.setText(time);
if (message.getLiked()==0) {
simpleHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context,R.drawable.unlike));
}else {
simpleHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context,R.drawable.like));
}
break;
case 2 :
ImageHolder imageHolder = (ImageHolder)holder;
//in method esme folder va esme aks ro migire o check mikone bebine mojode ya na
if (isFileExists(Config.Folders.IMAGES ,message.getUrl())) {
imageHolder.circularProgressBar.setVisibility(View.GONE);
imageHolder.iv_download.setVisibility(View.GONE);
Glide.with(context).load(getFile(Config.Folders.IMAGES,message.getUrl())).apply(new RequestOptions()
.diskCacheStrategy(DiskCacheStrategy.ALL)
) .into(new SimpleTarget<Drawable>() {
@Override
public void onResourceReady(Drawable resource, Transition<? super Drawable> transition) {
((ImageHolder) holder).iv_picture.setImageDrawable(resource);
}
});
imageHolder.iv_picture.setImageURI(Uri.fromFile(getFile(Config.Folders.IMAGES,message.getUrl())));
}else {
imageHolder.iv_download.setVisibility(View.VISIBLE);
imageHolder.circularProgressBar.setVisibility(View.VISIBLE);
Glide.with(context).load(Config.MESSAGE_THUMB_ADDRESS+message.getThumb()).apply(new RequestOptions()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.placeholder(ContextCompat.getDrawable(context,R.drawable.white))
).into(imageHolder.iv_picture);
}
imageHolder.tv_time.setText(time);
if (message.getMessage()!=null) {
imageHolder.tv_text.setVisibility(View.VISIBLE);
imageHolder.tv_text.setText(message.getMessage());
}else {
imageHolder.tv_text.setVisibility(View.GONE);
}
if (message.getLiked()==0) {
imageHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context,R.drawable.unlike));
}else {
imageHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context,R.drawable.like));
}
break;
但它们都不起作用
我的适配器类的整个代码是
public class Message_Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
Context context;
ArrayList<Message> messages;
ClickListener clickListener;
public Message_Adapter(Context context, ArrayList<Message> messages) {
this.context = context;
this.messages = messages;
setHasStableIds(true);
}
public interface ClickListener {
public void picture_imageClicked(int position, View view, CircularProgressBar circularProgressBar, ImageView iv_download);
public void picture_likeClicked(int position, View view);
public void picture_commentClicked(int position, View view);
public void simple_likeClicked(int position, View view);
public void simple_commentClicked(int position, View view);
public void video_imageClicked(int position, View view, CircularProgressBar circularProgressBar, ImageView iv_download);
public void video_likeClicked(int position, View view);
public void video_commentClicked(int position, View view);
}
public void setCliclListener(ClickListener cliclListener) {
this.clickListener = cliclListener;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == 1) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_simple, parent, false);
return new SimpleHolder(view);
} else if (viewType == 2) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_picture, parent, false);
CircularProgressBar circularProgressBar = (CircularProgressBar) view.findViewById(R.id.cp_picturee);
circularProgressBar.setColor(ContextCompat.getColor(context, android.R.color.holo_blue_dark));
circularProgressBar.setBackgroundColor(ContextCompat.getColor(context, android.R.color.holo_blue_dark));
circularProgressBar.setProgressBarWidth(10);
circularProgressBar.setBackgroundProgressBarWidth(5);
int animationDuration = 2500; // 2500ms = 2,5s
// circularProgressBar.setProgressWithAnimation(65, animationDuration);
return new ImageHolder(view);
} else if (viewType == 3) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_video, parent, false);
CircularProgressBar circularProgressBar = (CircularProgressBar) view.findViewById(R.id.cp_video);
circularProgressBar.setColor(ContextCompat.getColor(context, android.R.color.holo_blue_dark));
circularProgressBar.setBackgroundColor(ContextCompat.getColor(context, android.R.color.holo_blue_dark));
circularProgressBar.setProgressBarWidth(10);
circularProgressBar.setBackgroundProgressBarWidth(5);
return new VideoHolder(view);
} else {
throw new RuntimeException("The type has to be ONE or TWO");
}
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
Message message = messages.get(position);
String time = "00:00";
Date date = null;
try {
date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(message.getUpdated_at());
time = new SimpleDateFormat("H:mm").format(date);
} catch (ParseException e) {
e.printStackTrace();
}
switch (holder.getItemViewType()) {
case 1:
SimpleHolder simpleHolder = (SimpleHolder) holder;
simpleHolder.tv_text.setText(message.getMessage());
simpleHolder.tv_time.setText(time);
if (message.getLiked() == 0) {
simpleHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.unlike));
} else {
simpleHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.like));
}
break;
case 2:
ImageHolder imageHolder = (ImageHolder) holder;
//in method esme folder va esme aks ro migire o check mikone bebine mojode ya na
if (isFileExists(Config.Folders.IMAGES, message.getUrl())) {
imageHolder.circularProgressBar.setVisibility(View.GONE);
imageHolder.iv_download.setVisibility(View.GONE);
Glide.with(context).load(getFile(Config.Folders.IMAGES, message.getUrl())).apply(new RequestOptions()
.diskCacheStrategy(DiskCacheStrategy.ALL)
).into(new SimpleTarget<Drawable>() {
@Override
public void onResourceReady(Drawable resource, Transition<? super Drawable> transition) {
((ImageHolder) holder).iv_picture.setImageDrawable(resource);
}
});
imageHolder.iv_picture.setImageURI(Uri.fromFile(getFile(Config.Folders.IMAGES, message.getUrl())));
} else {
imageHolder.iv_download.setVisibility(View.VISIBLE);
imageHolder.circularProgressBar.setVisibility(View.VISIBLE);
Glide.with(context).load(Config.MESSAGE_THUMB_ADDRESS + message.getThumb()).apply(new RequestOptions()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.placeholder(ContextCompat.getDrawable(context, R.drawable.white))
).into(imageHolder.iv_picture);
}
imageHolder.tv_time.setText(time);
if (message.getMessage() != null) {
imageHolder.tv_text.setVisibility(View.VISIBLE);
imageHolder.tv_text.setText(message.getMessage());
} else {
imageHolder.tv_text.setVisibility(View.GONE);
}
if (message.getLiked() == 0) {
imageHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.unlike));
} else {
imageHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.like));
}
break;
case 3:
VideoHolder videoHolder = (VideoHolder) holder;
videoHolder.tv_time.setText(time);
if (message.getMessage() != null) {
videoHolder.tv_text.setVisibility(View.VISIBLE);
videoHolder.tv_text.setText(message.getMessage());
} else {
videoHolder.tv_text.setVisibility(View.GONE);
}
if (message.getLiked() == 0) {
videoHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.unlike));
} else {
videoHolder.iv_like.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.like));
}
Glide.with(context).load(Config.VIDEO_PIC_ADDRES + message.getThumb()).apply(new RequestOptions()
.diskCacheStrategy(DiskCacheStrategy.ALL)
).into(videoHolder.iv_picture);
if (isFileExists(Config.Folders.VIDEOS, message.getUrl())) {
videoHolder.circularProgressBar.setVisibility(View.INVISIBLE);
videoHolder.iv_download.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.play));
} else {
videoHolder.iv_download.setVisibility(View.VISIBLE);
videoHolder.circularProgressBar.setVisibility(View.VISIBLE);
videoHolder.iv_download.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.download));
}
String lenth = message.getLenth() < 1024 ? message.getLenth() + " kb" : message.getLenth() / 1024 + " mb";
videoHolder.tv_video_time.setText(message.getTime() + " | " + lenth);
break;
default:
break;
}
}
public boolean isFileExists(String folderName, String filename) {
if (filename == null) {
filename = "null";
}
File file = new File(Environment.getExternalStorageDirectory() + "/NoorAlSalehin/" + folderName, filename);
return file.exists();
}
public File getFile(String folderName, String filename) {
File file = new File(Environment.getExternalStorageDirectory() + "/NoorAlSalehin/" + folderName, filename);
return file;
}
@Override
public int getItemCount() {
return messages.size();
}
@Override
public int getItemViewType(int position) {
int type = messages.get(position).getType();
if (type == 1) {
return 1;
} else if (type == 2) {
return 2;
} else if (type == 3) {
return 3;
} else {
return -1;
}
}
@Override
public long getItemId(int position) {
return position;
}
class SimpleHolder extends RecyclerView.ViewHolder {
TextView tv_text, tv_time;
ImageView iv_like, iv_comment;
public SimpleHolder(View itemView) {
super(itemView);
tv_text = (TextView) itemView.findViewById(R.id.tv_custom_simple_text);
iv_like = (ImageView) itemView.findViewById(R.id.iv_simple_like);
iv_comment = (ImageView) itemView.findViewById(R.id.iv_simple_comment);
tv_time = (TextView) itemView.findViewById(R.id.tv_simple_time);
iv_like.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.simple_likeClicked(getAdapterPosition(), view);
}
});
iv_comment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.simple_commentClicked(getAdapterPosition(), view);
}
});
}
}
class ImageHolder extends RecyclerView.ViewHolder {
ImageView iv_picture, iv_download, iv_like, iv_comment;
TextView tv_text, tv_time;
CircularProgressBar circularProgressBar;
public ImageHolder(View itemView) {
super(itemView);
iv_download = (ImageView) itemView.findViewById(R.id.iv_picture_download);
iv_picture = (ImageView) itemView.findViewById(R.id.iv_picture_image);
circularProgressBar = (CircularProgressBar) itemView.findViewById(R.id.cp_picturee);
tv_text = (TextView) itemView.findViewById(R.id.tv_picture_text);
iv_comment = (ImageView) itemView.findViewById(R.id.iv_picture_comment);
tv_time = (TextView) itemView.findViewById(R.id.tv_picture_time);
iv_picture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.picture_imageClicked(getAdapterPosition(), view, circularProgressBar, iv_download);
}
});
iv_like = (ImageView) itemView.findViewById(R.id.iv_picture_like);
iv_like.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.picture_likeClicked(getAdapterPosition(), view);
}
});
iv_comment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.picture_commentClicked(getAdapterPosition(), view);
}
});
}
}
class VideoHolder extends RecyclerView.ViewHolder {
// ImageView iv_picture , iv_like , iv_comment;
ImageView iv_picture, iv_download, iv_like, iv_comment;
TextView tv_text, tv_time, tv_video_time;
// CircleProgressView circleProgressView ;
CircularProgressBar circularProgressBar;
public VideoHolder(View itemView) {
super(itemView);
iv_download = (ImageView) itemView.findViewById(R.id.iv_video_download_playy);
iv_picture = (ImageView) itemView.findViewById(R.id.iv_video_image);
// circleProgressView=(CircleProgressView)itemView.findViewById(R.id.cp_video_download);
circularProgressBar = (CircularProgressBar) itemView.findViewById(R.id.cp_video);
tv_text = (TextView) itemView.findViewById(R.id.tv_video_text);
iv_comment = (ImageView) itemView.findViewById(R.id.iv_video_comment);
tv_time = (TextView) itemView.findViewById(R.id.tv_video_time);
iv_picture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.video_imageClicked(getAdapterPosition(), view, circularProgressBar, iv_download);
}
});
tv_video_time = (TextView) itemView.findViewById(R.id.tv_video_video_time);
iv_like = (ImageView) itemView.findViewById(R.id.iv_video_like);
iv_like.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.video_likeClicked(getAdapterPosition(), view);
}
});
iv_comment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
clickListener.video_commentClicked(getAdapterPosition(), view);
}
});
}
}
}