滚动到特定位置时，Recyclerview崩溃
[英]Recyclerview crashed when scrolled to particular position
问题描述
I have RecyclerView and it has Pagination, When I scroll some times it is being crashed. 我有RecyclerView ，它具有分页功能，当我滚动几次时，它崩溃了。 When I scroll slowly it is not being crashed. 当我缓慢滚动时，它不会崩溃。 I have provided Adapter and Activity code. 我提供了适配器和活动代码。 Please let me know any mistake here I did. 请让我知道我在这里犯的任何错误。 I have searched for same issues , but I am not able to catch error here. 我已经搜索了相同的问题，但是我无法在此处捕获错误。
private class GetTrending extends AsyncTask<Void, Void, Void> {
BufferedReader bufferedReader = null;
private StringBuffer stringBuffer = new StringBuffer();
private JSONArray jArray = new JSONArray();
private int pageNum;
private boolean value;
public GetTrending(int pageNum, boolean value) {
this.pageNum = pageNum;
this.value = value;
}
@Override
protected Void doInBackground(Void... params) {
try {
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet();
URI uri = new URI(getString(R.string.url) +
"products?bestsellers=on&items_per_page=24&page=" + pageNum + mWholeSaleUrlTag);
httpGet.setURI(uri);
httpGet.addHeader(BasicScheme.authenticate(
new UsernamePasswordCredentials(getString(R.string.username), getString(R.string.password)),
HTTP.UTF_8, false));
HttpResponse httpResponse;
Log.e("Trending-Before", "Date" + new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(new Date()));
httpResponse = httpClient.execute(httpGet);
Log.e("Trending-After", "New Date" + new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(new Date()));
InputStream inputStream = httpResponse.getEntity().getContent();
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
//Log.e("Hi", String.valueOf(bufferedReader));
String readLine = bufferedReader.readLine();
while (readLine != null) {
stringBuffer.append(readLine);
//stringBuffer.append("\n");
readLine = bufferedReader.readLine();
}
//Log.e("BestSellers", String.valueOf(stringBuffer));
} catch (IOException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
}
try {
JSONObject prodObjects = new JSONObject(String.valueOf(stringBuffer));
jArray = prodObjects.optJSONArray("products");
if (jArray.length() < 24) {
shouldFetchTrending = false;
}
for (int i = 0; i < jArray.length(); i++) {
Home home = new Home();
prodObjects = jArray.getJSONObject(i);
home.setProduct_id(prodObjects.getString("product_id"));
// Log.e("Trending id", jobj.getString("product_id"));
home.setProduct_name(prodObjects.getString("product"));
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
nf.setMaximumFractionDigits(2);
home.setProduct_price(nf.format(Double.parseDouble(prodObjects.getString("price"))));
home.setProduct_listprice(nf.format(Double.parseDouble(prodObjects.getString("list_price"))));
String mAmount = prodObjects.getString("amount");
home.setAmount(mAmount);
Item item = new Item();
item.setName(prodObjects.getString("product"));
item.setProductId(prodObjects.getString("product_id"));
item.setPrice(nf.format(Double.parseDouble(prodObjects.getString("price"))));
item.setListPrice(nf.format(Double.parseDouble(prodObjects.getString("list_price"))));
item.setImage(prodObjects.getJSONObject("main_pair").getJSONObject("detailed").getString("image_path"));
item.setAmount(mAmount);
home.setProduct_image(prodObjects.getJSONObject("main_pair").getJSONObject("detailed").getString("image_path"));
if (prodObjects.getString("status").equalsIgnoreCase("A") && !prodObjects.getString("amount").equalsIgnoreCase("0")) {
Sports.add(home);
trendingItemList.add(item);
}
}
// Log.e("Length", String.valueOf(Sports.size()));
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result) {
super.onPostExecute(result);
shouldFetchTrending = true;
if (value) {
trendingItemAdapter = new ItemAdapter(HomeActivity.this, trendingItemList);
mTrendingRecyclerView.setAdapter(trendingItemAdapter);
}
trendingItemAdapter.notifyDataSetChanged();
mTrendingRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(HomeActivity.this, new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
((CardView) view).setCardElevation(100);
Intent myintent = new Intent(HomeActivity.this, ProductPageActivity.class);
myintent.putExtra("Prodid", trendingItemList.get(position).getProductId());
myintent.putExtra("FromHome", "Home");
startActivity(myintent);
}
}));
try {
for (int i = 0; i < Sports.size(); ++i) {
trendinglinear[i].setVisibility(View.VISIBLE);
tname[i].setText(Sports.get(i).getProduct_name());
tprice[i].setText(Sports.get(i).getProduct_price());
((View) tname[i].getParent()).setTag(Sports.get(i).getProduct_id());
String[] simg = new String[25];
simg[i] = Sports.get(i).getProduct_image();
//Log.e("image", simg[i]);
Picasso.with(getApplicationContext()).load(simg[i]).error(R.drawable.ic_launcher).resize(400, 400).into(timage[i]);
}
} catch (Exception e) {
//Toast.makeText(HomeActivity.this, "Failed to connect to internet Try again !", Toast.LENGTH_SHORT).show();
}
}
}
public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ViewHolder> {
private List<Item> itemList;
private Context context;
private int lastPosition = -1;
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.home_recycler_item, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Item item = itemList.get(position);
holder.tvName.setText(item.getName());
if(Integer.valueOf(item.getAmount()) == 0)
holder.tvOutofstack.setVisibility(View.VISIBLE);
else holder.tvOutofstack.setVisibility(View.INVISIBLE);
holder.tvPrice.setText(item.getPrice());
Picasso.with(context).load(item.getImage()).into(holder.ivImage);
setAnimation(holder.cardView, position);
}
@Override
public int getItemCount() {
return itemList.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView tvName,tvOutofstack;
public TextView tvPrice;
public ImageView ivImage;
public CardView cardView;
public ViewHolder(View itemView) {
super(itemView);
tvName = (TextView) itemView.findViewById(R.id.tv_name);
tvOutofstack = (TextView) itemView.findViewById(R.id.item_adapter_tv);
tvPrice = (TextView) itemView.findViewById(R.id.tv_price);
ivImage = (ImageView) itemView.findViewById(R.id.iv_image);
cardView = (CardView) itemView.findViewById(R.id.card_view);
}
}
public ItemAdapter(Context context, List<Item> itemList) {
this.itemList = itemList;
this.context = context;
}
private void setAnimation(View viewToAnimate, int position)
{
// If the bound view wasn't previously displayed on screen, it's animated
if (position > lastPosition)
{
Animation animation = AnimationUtils.loadAnimation(context, android.R.anim.slide_in_left);
viewToAnimate.startAnimation(animation);
lastPosition = position;
}
}
}
Some error shown(Log): 显示了一些错误（日志）：
java.lang.InternalError: Thread starting during runtime shutdown 07-13 09:01:29.721 32089-1640/?
3 个解决方案
解决方案1
0 2017-07-13 04:11:53
You are doing too much work in the main thread. 您在主线程中做的工作太多。 System is way passed it's limit and to execute your process it takes a significant amount of resources and it freezes the main UI thread leads to ANR error. 系统已超出极限，要执行您的过程，它会占用大量资源，并且冻结主UI线程会导致ANR错误。 I recommend you to do all the API calls and JSON parsing in the in the background thread by using AsyncTask . 我建议您使用AsyncTask在后台线程中进行所有API调用和JSON解析。
解决方案2
0 2017-07-13 04:26:07
You have Out Of Memory Exception. 您有内存不足异常。 In some devices, when you pass the max heap, it won't show any log and the JVM just terminate your application. 在某些设备中，当您传递最大堆时，它将不显示任何日志，并且JVM仅终止您的应用程序。 When you scroll slowly, you let the JVM to complete its garbage collection process, But when you scroll fast, it doesn't have enough time to complete its task and you will pass the max heap. 缓慢滚动时，让JVM完成其垃圾回收过程，但是快速滚动时，它没有足够的时间来完成其任务，因此您将传递max堆。 I see you hold a reference to a list of views and ImageViews. 我看到您持有对视图和ImageViews列表的引用。
try {
for (int i = 0; i < Sports.size(); ++i) {
trendinglinear[i].setVisibility(View.VISIBLE);
tname[i].setText(Sports.get(i).getProduct_name());
tprice[i].setText(Sports.get(i).getProduct_price());
((View) tname[i].getParent()).setTag(Sports.get(i).getProduct_id());
String[] simg = new String[25];
simg[i] = Sports.get(i).getProduct_image();
//Log.e("image", simg[i]);
Picasso.with(getApplicationContext()).load(simg[i]).error(R.drawable.ic_launcher).resize(400, 400).into(timage[i]);
}
} catch (Exception e) {
//Toast.makeText(HomeActivity.this, "Failed to connect to internet Try again !", Toast.LENGTH_SHORT).show();
}
It may be one of the reasons that why your heap is reaching the max size. 这可能是您的堆达到最大大小的原因之一。
解决方案3
0 已采纳 2017-08-03 06:43:12
App is being crashed for memory management failure , here every item is assigned animation , and applied animation is not cleared.I have solved your problem spending 1 day, it's worked for me. 应用程式因记忆体管理失败而当机，这里为每个项目指派了动画，并且未清除应用的动画。我花了1天的时间解决了您的问题，对我来说很有效。
@Override public void onViewDetachedFromWindow(ViewHolder holder) {
super.onViewDetachedFromWindow(holder);
((ViewHolder)holder).clearAnimation();
}
In my ViewHolder added method: 在我的ViewHolder中添加的方法：
public void clearAnimation() {
itemView.clearAnimation();
}
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