我有一个int i = 0;
public void track(View view) {
while (!m1.isPlaying()) {
play(list.get(i));
while (m1.isPlaying()) ;
i++;
}
}
public void play(String T) {
try {
m1.setDataSource(T);
m1.prepare();
m1.start();
} catch (IOException e) {
Toast toast = Toast.makeText(getApplicationContext(), "Network Error", Toast.LENGTH_SHORT);
toast.show();
}
}
，每行包含一个带有类别标题的可变元素的网格。
我正在实施一个RecyclerView来过滤列表，但我一直得到＆＃34;索引越界＆＃34;。
我认为问题在于，当我搜索时，传递给适配器的元素（数组）是针对每一行的，因为每一行都有不同数量的元素，在某些时候，位置值包含某个行的旧索引。我需要以某种方式过滤每一行。 我已经解决了一段时间了。
适用于SearchView：
RecyclerView每行适配器：
public class SectionedGridRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final Context mContext;
private static final int SECTION_TYPE = 0;
private boolean mValid = true;
private int mSectionResourceId;
private int mTextResourceId;
private LayoutInflater mLayoutInflater;
private RecyclerView.Adapter mBaseAdapter;
private SparseArray<Section> mSections = new SparseArray<Section>();
private RecyclerView mRecyclerView;
public SectionedGridRecyclerViewAdapter(Context context, int sectionResourceId, int textResourceId,RecyclerView recyclerView,
RecyclerView.Adapter baseAdapter) {
mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mSectionResourceId = sectionResourceId;
mTextResourceId = textResourceId;
mBaseAdapter = baseAdapter;
mContext = context;
mRecyclerView = recyclerView;
mBaseAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
@Override
public void onChanged() {
mValid = mBaseAdapter.getItemCount()>0;
notifyDataSetChanged();
}
@Override
public void onItemRangeChanged(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeChanged(positionStart, itemCount);
}
@Override
public void onItemRangeInserted(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeInserted(positionStart, itemCount);
}
@Override
public void onItemRangeRemoved(int positionStart, int itemCount) {
mValid = mBaseAdapter.getItemCount()>0;
notifyItemRangeRemoved(positionStart, itemCount);
}
});
final GridLayoutManager layoutManager = (GridLayoutManager)(mRecyclerView.getLayoutManager());
layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
return (isSectionHeaderPosition(position))? layoutManager.getSpanCount() : 1 ;
}
});
}
public static class SectionViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public SectionViewHolder(View view, int mTextResourceid) {
super(view);
title = (TextView) view.findViewById(mTextResourceid);
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int typeView) {
if (typeView == SECTION_TYPE) {
final View view = LayoutInflater.from(mContext).inflate(mSectionResourceId, parent, false);
return new SectionViewHolder(view,mTextResourceId);
}else{
return mBaseAdapter.onCreateViewHolder(parent, typeView -1);
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder sectionViewHolder, int position) {
if (isSectionHeaderPosition(position)) {
((SectionViewHolder)sectionViewHolder).title.setText(mSections.get(position).title);
}else{
mBaseAdapter.onBindViewHolder(sectionViewHolder,sectionedPositionToPosition(position));
}
}
@Override
public int getItemViewType(int position) {
return isSectionHeaderPosition(position)
? SECTION_TYPE
: mBaseAdapter.getItemViewType(sectionedPositionToPosition(position)) +1 ;
}
public static class Section {
int firstPosition;
int sectionedPosition;
CharSequence title;
public Section(int firstPosition, CharSequence title) {
this.firstPosition = firstPosition;
this.title = title;
}
public CharSequence getTitle() {
return title;
}
}
public void setSections(Section[] sections) {
mSections.clear();
Arrays.sort(sections, new Comparator<Section>() {
@Override
public int compare(Section o, Section o1) {
return (o.firstPosition == o1.firstPosition)
? 0
: ((o.firstPosition < o1.firstPosition) ? -1 : 1);
}
});
int offset = 0; // offset positions for the headers we're adding
for (Section section : sections) {
section.sectionedPosition = section.firstPosition + offset;
mSections.append(section.sectionedPosition, section);
++offset;
}
notifyDataSetChanged();
}
public int positionToSectionedPosition(int position) {
int offset = 0;
for (int i = 0; i < mSections.size(); i++) {
if (mSections.valueAt(i).firstPosition > position) {
break;
}
++offset;
}
return position + offset;
}
public int sectionedPositionToPosition(int sectionedPosition) {
if (isSectionHeaderPosition(sectionedPosition)) {
return RecyclerView.NO_POSITION;
}
int offset = 0;
for (int i = 0; i < mSections.size(); i++) {
if (mSections.valueAt(i).sectionedPosition > sectionedPosition) {
break;
}
--offset;
}
return sectionedPosition + offset;
}
public boolean isSectionHeaderPosition(int position) {
return mSections.get(position) != null;
}
@Override
public long getItemId(int position) {
return isSectionHeaderPosition(position)
? Integer.MAX_VALUE - mSections.indexOfKey(position)
: mBaseAdapter.getItemId(sectionedPositionToPosition(position));
}
@Override
public int getItemCount() {
return (mValid ? mBaseAdapter.getItemCount() + mSections.size() : 0);
}
}
我的活动：
public class SimpleAdapter extends RecyclerView.Adapter<SimpleAdapter.SimpleViewHolder> {
private final Context mContext;
private List<Activity> mItems;
private int mCurrentItemId = 0;
int poz;
public static class SimpleViewHolder extends RecyclerView.ViewHolder {
public final TextView title;
public final ImageView image;
public SimpleViewHolder(View view) {
super(view);
title = (TextView) view.findViewById(R.id.item_title);
image = (ImageView) view.findViewById(R.id.item_image);
}
}
public SimpleAdapter(Context context, List<Activity> activities) {
mContext = context;
mItems = activities;
}
public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final View view = LayoutInflater.from(mContext).inflate(R.layout.item, parent, false);
return new SimpleViewHolder(view);
}
@Override
public void onBindViewHolder(SimpleViewHolder holder, int position) {
poz = position;
holder.title.setText(mItems.get(position).getName());
Picasso.with(mContext).load(mItems.get(position).getImage_url()).into(holder.image);
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d("Activity", mItems.get(poz).getName() + " Clicked");
}
});
}
public void addItem(int position) {
final int id = mCurrentItemId++;
notifyItemInserted(position);
}
@Override
public int getItemCount() {
return mItems.size();
}
//new stuff
public void setModels(List<Activity> models) {
mItems = new ArrayList<>(models);
}
public Activity removeItem(int position) {
final Activity model = mItems.remove(position);
notifyItemRemoved(position);
return model;
}
public void addItem(int position, Activity model) {
mItems.add(position, model);
notifyItemInserted(position);
}
public void moveItem(int fromPosition, int toPosition) {
final Activity model = mItems.remove(fromPosition);
mItems.add(toPosition, model);
notifyItemMoved(fromPosition, toPosition);
}
public void animateTo(List<Activity> models) {
applyAndAnimateRemovals(models);
applyAndAnimateAdditions(models);
applyAndAnimateMovedItems(models);
}
private void applyAndAnimateRemovals(List<Activity> newModels) {
for (int i = mItems.size() - 1; i >= 0; i--) {
final Activity model = mItems.get(i);
if (!newModels.contains(model)) {
removeItem(i);
}
}
}
private void applyAndAnimateAdditions(List<Activity> newModels) {
for (int i = 0, count = newModels.size(); i < count; i++) {
final Activity model = newModels.get(i);
if (!mItems.contains(model)) {
addItem(i, model);
}
}
}
private void applyAndAnimateMovedItems(List<Activity> newModels) {
for (int toPosition = newModels.size() - 1; toPosition >= 0; toPosition--) {
final Activity model = newModels.get(toPosition);
final int fromPosition = mItems.indexOf(model);
if (fromPosition >= 0 && fromPosition != toPosition) {
moveItem(fromPosition, toPosition);
}
}
}
}