使用SearchView小部件时如何在RecyclerView中突出显示过滤的文本 [英] How to highlight filtered text in RecyclerView when using SearchView widget
本文介绍了使用SearchView小部件时如何在RecyclerView中突出显示过滤的文本的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何在RecyclerView中突出显示搜索文本结果. 我发现了一些有关Spannable TextView的帖子，但不确定在我的情况下该在哪里实现. 赞赏您可以提供帮助.
How to highlight search text result in RecyclerView. I found some posts regarding Spannable TextView, but not sure where to implement in my case. Appreciate you can look and assist.
MainActivity或Chapter1
public class Chapter1 extends AppCompatActivity implements SearchView.OnQueryTextListener {
MyRecAdapter myRecAdapter;
RecyclerView recyclerView;
List<Post> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(layout.chapter1_main);
recyclerView = (RecyclerView) findViewById(R.id.myrec);
createdata();
myRecAdapter = new MyRecAdapter(list, Chapter1.this);
recyclerView.setLayoutManager(new LinearLayoutManager(Chapter1.this));
recyclerView.setAdapter(myRecAdapter);
}
void createdata() {
list = new ArrayList<>();
String topic_1_1 = getResources().getString(string.topic_1_1);
String text_1_1 = getString(string.text_1_1);
String topic_1_2 = getResources().getString(string.topic_1_2);
String topic_1_3 = getResources().getString(string.topic_1_3);
String text_1_3 = getString(string.text_1_3);
list.add(new Post(topic_1_1, text_1_1));
list.add(new Post(topic_1_2, ""));
list.add(new Post(topic_1_3, text_1_3));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_search, menu);
getMenuInflater().inflate(R.menu.main, menu);
MenuItem item = menu.findItem(R.id.menu_search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onQueryTextChange(String newText) {
final List<Post> filteredModelList = filter(list, newText);
if (filteredModelList.size() > 0) {
myRecAdapter.setFilter(filteredModelList);
return true;
} else {
Toast.makeText(Chapter1.this, "Not Found", Toast.LENGTH_SHORT).show();
return false;
}
}
private List<Post> filter(List<Post> models, String query ) {
query = query.toLowerCase();
final List<Post> filteredModelList = new ArrayList<>();
for (Post model : models) {
final String text = model.getPostTitle().toLowerCase();
final String text_sub = model.getPostSubTitle().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
else {
if (text_sub.contains(query)) {
filteredModelList.add(model);
}
}
}
createdata();
myRecAdapter = new MyRecAdapter(filteredModelList, Chapter1.this);
recyclerView.setLayoutManager(new LinearLayoutManager(Chapter1.this));
recyclerView.setAdapter(myRecAdapter);
myRecAdapter.notifyDataSetChanged();
return filteredModelList;
}
}
适配器
public class MyRecAdapter extends RecyclerView.Adapter<MyRecAdapter.VH> {
public List<Post> parkingList;
public Context context;
ArrayList<Post> mCountryModel;
public MyRecAdapter(List<Post> parkingList, Context context) {
this.parkingList = parkingList;
this.context = context;
}
@Override
public MyRecAdapter.VH onCreateViewHolder(ViewGroup parent, int viewType) {
return new MyRecAdapter.VH(LayoutInflater.from(parent.getContext()).inflate(R.layout.mycardview, parent, false));
}
@Override
public void onBindViewHolder(MyRecAdapter.VH holder, int position) {
holder.t1.setText(Html.fromHtml(parkingList.get(position).getPostTitle())); holder.t2.setText(Html.fromHtml(parkingList.get(position).getPostSubTitle()));
}
@Override
public int getItemCount() {
return parkingList.size();
}
public class VH extends RecyclerView.ViewHolder {
TextView t1, t2;
public VH(View view) {
super(view);
t1 = (TextView) view.findViewById(R.id.list_title);
t2 = (TextView) view.findViewById(R.id.list_desc);
}
}
public void setFilter(List<Post> countryModels) {
mCountryModel = new ArrayList<>();
mCountryModel.addAll(countryModels);
notifyDataSetChanged();
}
}
推荐答案
将适配器更改为
public class MyRecAdapter extends RecyclerView.Adapter<MyRecAdapter.VH> {
public List<Post> parkingList;
public Context context;
ArrayList<Post> mCountryModel;
String searchText;
public MyRecAdapter(List<Post> parkingList, Context context) {
this.parkingList = parkingList;
this.context = context;
}
@Override
public MyRecAdapter.VH onCreateViewHolder(ViewGroup parent, int viewType) {
return new MyRecAdapter.VH(LayoutInflater.from(parent.getContext()).inflate(R.layout.mycardview, parent, false));
}
@Override
public void onBindViewHolder(MyRecAdapter.VH holder, int position) {
String title = parkingList.get(position).getPostTitle();
String desc = parkingList.get(position).getPostSubTitle();
holder.t1.setText(Html.fromHtml(title));
if(searchText.length()>0){
//color your text here
int index = desc.indexOf(searchText);
while(index>0){
SpannableStringBuilder sb = new SpannableStringBuilder(desc);
ForegroundColorSpan fcs = new ForegroundColorSpan(Color.rgb(158, 158, 158)); //specify color here
sb.setSpan(fcs, index, searchText.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
index = desc.indexOf(searchText,index+1);
}
holder.t2.setText(sb);
}else{
holder.t2.setText(Html.fromHtml(desc));
}
}
@Override
public int getItemCount() {
return parkingList.size();
}
public class VH extends RecyclerView.ViewHolder {
TextView t1, t2;
public VH(View view) {
super(view);
t1 = (TextView) view.findViewById(R.id.list_title);
t2 = (TextView) view.findViewById(R.id.list_desc);
}
}
public void setFilter(List<Post> countryModels,String searchText) {
mCountryModel = new ArrayList<>();
mCountryModel.addAll(countryModels);
this.searchText = searchText;
notifyDataSetChanged();
}
}
并将onQueryTextChange设置为
and set onQueryTextChange to
@Override
public boolean onQueryTextChange(String newText) {
final List<Post> filteredModelList = filter(list, newText);
if (filteredModelList.size() > 0) {
myRecAdapter.setFilter(filteredModelList,newText);
return true;
} else {
Toast.makeText(Chapter1.this, "Not Found", Toast.LENGTH_SHORT).show();
return false;
}
}
这篇关于使用SearchView小部件时如何在RecyclerView中突出显示过滤的文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
