java – Android.在RecyclerView中搜索和过滤

简要说明问题.我决定尝试使用RecyclerView.像搜索listView这样的现成解决方案,没有必要全部实现.所以我找到了一个解决方案,如果在源代码的底部需要一个解决方案,但是存在问题.
有一个列表,它显示标题,当您点击第二个回合Activiti中已有标题和完整描述的任何项目时.
意识到我喜欢：
在MainActivity中,我从数据库(使用Sugar ORM)标头和id加载

ArrayList<String> arrTitle = new ArrayList<>();
for(Contact contact:allContacts){
arrTitle.add(contact.title);
}

ArrayList<String> arrId = new ArrayList<>();
for(Contact contact:allContacts){
long  i = contact.getId();
String str = Long.toString(i);
arrId.add(str);
}

然后将它们传送到适配器

mAdapter = new RecyclerAdapter(arrTitle,arrId);

适配器Recycler Adapter我得到值推导标题到列表,第二个传递id活动

@Override
public void onBindViewHolder(ViewHolder holder,int position) {

// Convert the id to the array
idTab = new String[mId.size()];
for (int i = 0; i != mId.size(); i++) {
    idTab[i] = mId.get(i);
}

// Element position
final int idvadaptere = position;
// Display headers RecyclerView
holder.mTextView.setText(mDataset.get(position));

holder.itemView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Context context = v.getContext();
        Intent ddddd = new Intent(context,LastActivity.class);
        ddddd.putExtra("id",idTab[idvadaptere]);
        context.startActivity(ddddd);
    }
});
}

在第二个Activiti LastActivity中,我得到了id,并且在此id的基础上已经推断出文本字段中的值

// Get the Intent extract from it an object
// Extract from it an object
idString = intent.getStringExtra("id");
// Convert the id in number
idInt = Integer.parseInt(idString);


// Display the text fields
Contact title = Contact.findById(Contact.class,idInt);
String titleStr = title.title;
textView.setText(titleStr);

Contact prich = Contact.findById(Contact.class,idInt);
String prichStr = prich.prich;
textView2.setText(prichStr);

问题是,如果找到一个标题,这个列表的标题位置将不会是第五个,例如,第一个和id必须不同于第二个值aktiviti不公开第五个id,并且第一.
源搜索,如果您需要复制任何人,它可以正常工作,唯一的问题是通过单击列表项来传输数据.

activity_main.xml中

<android.support.v7.widget.SearchView
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:id="@+id/search_view"
  android:layout_gravity="right"
  app:theme="@style/Theme.AppCompat.NoActionBar"
  app:searchIcon="@drawable/ic_search_white_24dp"/>

MainActivity.java

private SearchView searchView;

在onCreate

searchView = (SearchView) findViewById(R.id.search_view);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
    @Override
    public boolean onQueryTextSubmit(String text) {
        return false;
    }

    @Override
    public boolean onQueryTextChange(String text) {
        mAdapter.filter(text);
        return false;
    }
});

RecyclerAdapter.java

private ArrayList<String> mDataset;
private ArrayList<String> mCleanCopyDataset;

构造函数

public RecyclerAdapter(ArrayList<String> dataset) {
mDataset = dataset;
mCleanCopyDataset = mDataset;
}

搜索

// The filter () method we iterate through all the items on the list and if any item contains the search text,we add it to a new list mDataset:

public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
mDataset = new ArrayList<String>();
if (charText.length() == 0) {
    // mCleanCopyDataset we always contains the unaltered and the filter (full) copy of the list of data
    mDataset.addAll(mCleanCopyDataset);
} else {
    for (String item : mCleanCopyDataset) {

       // we iterate through all the items on the list and if any item contains the search text,we add it to a new list mDataset
        if (item.toLowerCase(Locale.getDefault()).contains(charText)) {
            mDataset.add(item);
        }
    }
}
// method notifyDataSetChanged () allows you to update the list on the screen after filtration
notifyDataSetChanged();
}

完整代码
RecyclerAdapter.java

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {

private ArrayList<String> mDataset;
private ArrayList<String> mId;
private ArrayList<String> mCleanCopyDataset;
String[] idTab;
String[] titleTab;

public static class ViewHolder extends RecyclerView.ViewHolder {
    public TextView mTextView;

    public ViewHolder(View v) {
        super(v);
        mTextView = (TextView) v.findViewById(R.id.tv_recycler_item);
    }
}

public RecyclerAdapter(ArrayList<String> dataset,String[] titleTab,ArrayList<String> id) {
    mDataset = dataset;
    titleTab = titleTab;
    mId = id;
    mCleanCopyDataset = mDataset;
}

@Override
public RecyclerAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
    View v = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.recycler_item,parent,false);


    ViewHolder vh = new ViewHolder(v);
    return vh;
}


@Override
public void onBindViewHolder(final ViewHolder holder,int position) {

    idTab = new String[mId.size()];
    for (int i = 0; i != mId.size(); i++) {
        idTab[i] = mId.get(i);
    }

     holder.mTextView.setText(mDataset.get(position));

    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Context context = v.getContext();
            Intent ddddd = new Intent(context,LastActivity.class);
            ddddd.putExtra("id",idTab[holder.getAdapterPosition()]);
            context.startActivity(ddddd);
        }
    });
}


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



public void filter(String charText) {
    charText = charText.toLowerCase(Locale.getDefault());
    mDataset = new ArrayList<String>();
    if (charText.length() == 0) {

        mDataset.addAll(mCleanCopyDataset);
    } else {
        for (String item : mCleanCopyDataset) {

            if (item.toLowerCase(Locale.getDefault()).contains(charText)) {
                mDataset.add(item);
            }
        }
    }
    notifyDataSetChanged();
}

}