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我有2个回收视图适配器，首先是工作完美，我有下面的错误，第二个，2回收站视图适配器，第一个显示图像第二个显示错误没有附加适配器;跳绳布局
E/RecyclerView: No adapter attached; skipping layout
是否有可能是这样的错误呢？
if (mListener != null)
mListener.myMethod(Listitem);
都有不同的适配器
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView mRecyclerView1;
private RecyclerView.Adapter mAdapter1;
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(
new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false));
RecyclerOkHttpHandler handler = new RecyclerOkHttpHandler(this, new RecyclerOkHttpHandler.MyInterface() {
@Override
public void myMethod(ArrayList result) {
mAdapter = new MyAdapter(result,Search.this);
mAdapter.notifyDataSetChanged();
mRecyclerView.setAdapter(mAdapter);
}
});
handler.execute();
//second recycler
mRecyclerView1 = (RecyclerView) findViewById(R.id.my_recycler_view1);
mRecyclerView1.setHasFixedSize(true);
mRecyclerView1.setLayoutManager(
new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false));
RecyclerOkHttpHandler1 handler1 = new RecyclerOkHttpHandler1(this, new RecyclerOkHttpHandler1.MyInterface() {
@Override
public void myMethod(ArrayList result1) {
mAdapter1 = new MyAdapter1(result1,Search.this);
mAdapter1.notifyDataSetChanged();
mRecyclerView.setAdapter(mAdapter1);
}
});
handler1.execute();
这是RecyclerOkHttpHandler
public class RecyclerOkHttpHandler extends AsyncTask<String, Void, String> {
private Context mContext;
private MyInterface mListener;
public RecyclerOkHttpHandler (Context context, MyInterface mListener){
mContext = context;
this.mListener = mListener;
}
public interface MyInterface {
public void myMethod(ArrayList result);
}
private final String Fetch_URL = "http://je.com/getdata.php";
// ArrayList<Listitem> Listitem;
ArrayList<CategoryList> Listitem;
int resulta;
OkHttpClient httpClient = new OkHttpClient();
ListView list;
String myJSON;
JSONArray peoples = null;
InputStream inputStream = null;
@Override
protected String doInBackground(String... params) {
Log.d("okhttp Fetch_URL", Fetch_URL);
Request.Builder builder = new Request.Builder();
builder.url(Fetch_URL);
Request request = builder.build();
String result = null;
try {
Response response = httpClient.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
inputStream = response.body().byteStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
resulta = 1; //"Success
// return response.body().bytes();
} catch (Exception e) {
Toast.makeText(mContext, "Connection failed, check your connection",
Toast.LENGTH_LONG).show();
e.printStackTrace(); }
finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
return result;
}
@Override
protected void onPostExecute(String result){
if(resulta ==1){
myJSON=result;
Log.e("result",result);
showList();
}
else{
Log.e("d","there is an error on postexecute in okhhttphandler.java");
}
}
protected void showList(){
try {
JSONObject jsonObj = new JSONObject(myJSON);
peoples = jsonObj.getJSONArray("result");
System.out.println("Length:"+peoples.length());
int J_length=peoples.length()-1;
//JSONObject maxj = peoples.getJSONObject(peoples.length() - 1);
// max of arrray
jsonObj= peoples.getJSONObject(J_length);
String j_id= jsonObj.getString("id");
int _id = Integer.parseInt(j_id);
// if (_id < d_id) {
System.out.println("Getting json result ");
Listitem = new ArrayList<CategoryList>();
for (int i = 0; i < peoples.length(); i++) {
JSONObject c = peoples.getJSONObject(i);
// String id ="2";
String id = c.getString("id");
String url = c.getString("url");
int intid = 0;
try {
intid = Integer.parseInt(id.toString());
} catch (NumberFormatException nfe) {
System.out.println("Could not parse " + nfe);
}
// DatabaseHandler db = new DatabaseHandler(mContext);
Log.d("Insert: ", "Inserting ..");
//db.addObjects(new Objects(intid, "Image1", url, "IMAGES", "Leb Funny"));
Listitem.add(new CategoryList(id, url));
System.out.println(Listitem);
}
//}
if (mListener != null)
mListener.myMethod(Listitem);
// GridViewAdapter adapter = new GridViewAdapter(mContext, R.layout.grid_item_layout, Listitem);
// gridView.setAdapter(gridAdapter);
// adapter.notifyDataSetChanged();
// list.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
RecyclerOkHttpHandler1类
public class RecyclerOkHttpHandler1 extends AsyncTask<String, Void, String> {
private Context mContext;
private MyInterface mListener;
public RecyclerOkHttpHandler1(Context context, MyInterface mListener){
mContext = context;
this.mListener = mListener;
}
public interface MyInterface {
public void myMethod(ArrayList result);
}
private final String Fetch_URL = "http://je.com/getdata.php";
// ArrayList<Listitem> Listitem;
ArrayList<CategoryList> Listitem;
int resulta;
OkHttpClient httpClient = new OkHttpClient();
ListView list;
String myJSON;
JSONArray peoples = null;
InputStream inputStream = null;
@Override
protected String doInBackground(String... params) {
Log.d("okhttp Fetch_URL", Fetch_URL);
Request.Builder builder = new Request.Builder();
builder.url(Fetch_URL);
Request request = builder.build();
String result = null;
try {
Response response = httpClient.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
inputStream = response.body().byteStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
resulta = 1; //"Success
// return response.body().bytes();
} catch (Exception e) {
Toast.makeText(mContext, "Connection failed, check your connection",
Toast.LENGTH_LONG).show();
e.printStackTrace(); }
finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
return result;
}
@Override
protected void onPostExecute(String result){
if(resulta ==1){
myJSON=result;
Log.e("result",result);
showList();
}
else{
Log.e("d","there is an error on postexecute in okhhttphandler.java");
}
}
protected void showList(){
try {
JSONObject jsonObj = new JSONObject(myJSON);
peoples = jsonObj.getJSONArray("result");
System.out.println("Length:"+peoples.length());
int J_length=peoples.length()-1;
//JSONObject maxj = peoples.getJSONObject(peoples.length() - 1);
// max of arrray
jsonObj= peoples.getJSONObject(J_length);
String j_id= jsonObj.getString("id");
int _id = Integer.parseInt(j_id);
System.out.println(j_id);
//max of
// if (_id < d_id) {
System.out.println("Getting json result ");
Listitem = new ArrayList<CategoryList>();
for (int i = 0; i < peoples.length(); i++) {
JSONObject c = peoples.getJSONObject(i);
// String id ="2";
String id = c.getString("id");
String url = c.getString("url");
int intid = 0;
try {
intid = Integer.parseInt(id.toString());
} catch (NumberFormatException nfe) {
System.out.println("Could not parse " + nfe);
}
// DatabaseHandler db = new DatabaseHandler(mContext);
Log.d("Insert: ", "Inserting ..");
//db.addObjects(new Objects(intid, "Image1", url, "IMAGES", "Leb Funny"));
Listitem.add(new CategoryList(id, url));
System.out.println(Listitem);
}
//}
if (mListener != null)
mListener.myMethod(Listitem);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
我的适配器
public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<CategoryList> mDataset;
Context mContext;
public class ImageViewHolder extends RecyclerView.ViewHolder {
//ImageView mImage;
public TextView txtHeader;
public TextView txtFooter;
public ImageView image;
public ImageViewHolder(View itemView) {
super (itemView);
txtHeader = (TextView) itemView.findViewById(R.id.firstLine);
txtFooter = (TextView) itemView.findViewById(R.id.secondLine);
image = (ImageView) itemView.findViewById(R.id.imagecateg);
}
}
public void add(int position, CategoryList item) { //changed from string to listitem
mDataset.add(position, item);
notifyItemInserted(position);
}
public void remove(String item) {
int position = mDataset.indexOf(item);
mDataset.remove(position);
notifyItemRemoved(position);
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<CategoryList> myDataset, Context context) {
mDataset = myDataset;
mContext = context;
}
// Create new views (invoked by the layout manager)
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.category_search, parent, false);
// set the view's size, margins, paddings and layout parameters
ImageViewHolder vh = new ImageViewHolder(v);
return vh;
}
private static final int TYPE_IMAGE = 1;
private static final int TYPE_GROUP = 2;
@Override
public int getItemViewType(int position) {
// here your custom logic to choose the view type
return position;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(RecyclerView.ViewHolder TextViewHolder, int position) {
ImageViewHolder viewHolder = (ImageViewHolder) TextViewHolder;
// viewHolder.txtHeader.setText(...)
final CategoryList item;
// final String name = mDataset.get(position);
item = mDataset.get(position);
// viewHolder.txtHeader.setText(mDataset.get(position));
// this to be removed when added text
// viewHolder.txtHeader.setText(mDataset.get(position).getUrl());
Picasso.with(mContext)
.load(item.getUrl())
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(viewHolder.image);
/* viewHolder.txtFooter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
remove(item);
}
});*/
// viewHolder.txtFooter.setText("Footer: " + mDataset.get(position));
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.size();
}
}
我的适配器1
public class MyAdapter1 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<CategoryList> mDataset;
Context mContext;
public class ImageViewHolder extends RecyclerView.ViewHolder {
//ImageView mImage;
public TextView txtHeader;
public TextView txtFooter;
public ImageView image;
public ImageViewHolder(View itemView) {
super (itemView);
txtHeader = (TextView) itemView.findViewById(R.id.firstLine);
txtFooter = (TextView) itemView.findViewById(R.id.secondLine);
image = (ImageView) itemView.findViewById(R.id.imagecateg);
}
}
public void add(int position, CategoryList item) { //changed from string to listitem
mDataset.add(position, item);
notifyItemInserted(position);
}
public void remove(String item) {
int position = mDataset.indexOf(item);
mDataset.remove(position);
notifyItemRemoved(position);
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter1(ArrayList<CategoryList> myDataset, Context context) {
mDataset = myDataset;
mContext = context;
}
// Create new views (invoked by the layout manager)
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.category_search, parent, false);
// set the view's size, margins, paddings and layout parameters
ImageViewHolder vh = new ImageViewHolder(v);
return vh;
}
private static final int TYPE_IMAGE = 1;
private static final int TYPE_GROUP = 2;
@Override
public int getItemViewType(int position) {
// here your custom logic to choose the view type
return position;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(RecyclerView.ViewHolder TextViewHolder, int position) {
ImageViewHolder viewHolder = (ImageViewHolder) TextViewHolder;
// viewHolder.txtHeader.setText(...)
final CategoryList item;
// final String name = mDataset.get(position);
item = mDataset.get(position);
// viewHolder.txtHeader.setText(mDataset.get(position));
// this to be removed when added text
// viewHolder.txtHeader.setText(mDataset.get(position).getUrl());
Picasso.with(mContext)
.load(item.getUrl())
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(viewHolder.image);
/* viewHolder.txtFooter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
remove(item);
}
});*/
// viewHolder.txtFooter.setText("Footer: " + mDataset.get(position));
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.size();
}
}
请参阅：http：//stackoverflow.com/questions/29141729/recyclerview-no-adapter-attached-skipping-layout。区别在于将适配器设置为延迟方法，而不是在主线程中。 – Yashasvi
@Yashasvi @Yashasvi我看到了答案，我在我的代码中有相同的意思，我的意思是第一个适配器工作，第一个是在第二个但不同的适配器相同，为什么它不工作 – Moudiz
男性，看起来不错。但对我来说几乎每篇关于RecyclerViews的文章/博客都关注于创建列表，但没有保存列表。创建一个制作精美的/有价值的列表（比如我想下载的一大串歌曲）并没有好处，然后如果我通过单击后退按钮从列表中导航，就可以销毁列表。为什么不保存状态码就像创建其他需求一样创建每个RecyclerView列表：适配器，布局管理器，onCreateViewHolder，onBindViewHolder和getItemCount？思考？ – AJW