搜索视图结果在列表视图中，但不突出显示结果

Question

我创建了一个搜索视图，当我键入一个单词并从键盘按 Enter 时，结果会在 3 或 4 秒内显示在列表视图上。 所以我想插入一个进度微调器，直到填充结果。我还想尝试在列表视图中突出显示结果中的搜索词。我使用"SpannableString highlightKeyword"，但无法突出显示结果搜索词，我尝试了很多方法，然后是几个网站，但没有任何反应。我无法弄清楚错误在哪里。这是我的代码： 主要活动.java ：

public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener {
// Declare Variables
ListView list;
ListViewAdapter adapter;
SearchView editsearch;
String[] animalNameList;
ArrayList<AnimalNames> arraylist = new ArrayList<AnimalNames>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Resources res = getResources();
String[] animalNameList = res.getStringArray(R.array.animalNameList);

// Locate the ListView in listview_main.xml
list = (ListView) findViewById(R.id.listview);
for (int i = 0; i < animalNameList.length; i++) {
AnimalNames animalNames = new AnimalNames(animalNameList[i]);
// Binds all strings into an array
arraylist.add(animalNames);
}
// Pass results to ListViewAdapter Class
adapter = new ListViewAdapter(this, arraylist);
// Binds the Adapter to the ListView
list.setAdapter(adapter);
// Locate the EditText in listview_main.xml
editsearch = (SearchView) findViewById(R.id.search);
editsearch.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextSubmit(String newText) {
String text = newText;
adapter.filter(text);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
return false;
}

===== 列表视图适配器.java：

public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<AnimalNames> animalNamesList = null;
private ArrayList<AnimalNames> arraylist;
public ListViewAdapter(Context context, List<AnimalNames> animalNamesList) {
mContext = context;
this.animalNamesList = animalNamesList;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AnimalNames>();
this.arraylist.addAll(animalNamesList);
}
public class ViewHolder {
TextView name;
}
@Override
public int getCount() {
return animalNamesList.size();
}
@Override
public AnimalNames getItem(int position) {
return animalNamesList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.listview_item, null);
// Locate the TextViews in listview_item.xml
holder.name = (TextView) view.findViewById(R.id.name);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.name.setText(animalNamesList.get(position).getAnimalName());

return view;
}

// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
animalNamesList.clear();
if (charText.length() == 0) {
animalNamesList.addAll(arraylist);
} else {
for (AnimalNames wp : arraylist) {
if (wp.getAnimalName().toLowerCase(Locale.getDefault()).contains(charText)) {
animalNamesList.add(wp);
}
}
}
notifyDataSetChanged();
}

////Here My problem starts : 
public static SpannableString highlightKeyword(CharSequence text, Pattern p, int fgcolor, int bgcolor) {
SpannableString ss = new SpannableString(text);
ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE});
int start = 0;
int end;
Matcher m = p.matcher(text);
while (m.find(start)) {
start = m.start();
end = m.end();
BackgroundColorSpan bgspan = new BackgroundColorSpan(bgcolor);
ss.setSpan(bgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
ForegroundColorSpan fgspan = new ForegroundColorSpan(fgcolor);
ss.setSpan(fgspan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
start = end;
}
return ss;
}

////But even did not the result word highlighted. 

提前谢谢。

Answer 1

Alhamdulillah， 最后我在谷歌上找到了答案。getview()方法中的自定义适配器中的高额。如下：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
TextView text;
if (convertView == null) {
view = mInflater.inflate(R.layout.list_item, null);
} else {
view = convertView;
}
try {
if (mFieldId == 0) {
//  If no custom field is assigned, assume the whole resource is a TextView
text = (TextView) view;
} else {
//  Otherwise, find the TextView field within the layout
text = (TextView) view.findViewById(mFieldId);
}
} catch (ClassCastException e) {
Log.e("ArrayAdapter", "You must supply a resource ID for a TextView");
throw new IllegalStateException(
"ArrayAdapter requires the resource ID to be a TextView", e);
}
// HIGHLIGHT...

String fullText = getItem(position);
if (mSearchText != null && !mSearchText.isEmpty()) {
int startPos = fullText.toLowerCase(Locale.US).indexOf(mSearchText.toLowerCase(Locale.US));
int endPos = startPos + mSearchText.length();
if (startPos != -1) {
Spannable spannable = new SpannableString(fullText);
ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE});
TextAppearanceSpan highlightSpan = new TextAppearanceSpan(null, Typeface.BOLD, -1, blueColor, null);
spannable.setSpan(highlightSpan, startPos, endPos, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
text.setText(spannable);
} else {
text.setText(fullText);
}
} else {
text.setText(fullText);

}

return view;
}