在Listview中搜索,并在Listview Android中突出显示搜索到的文本颜色
作者：互联网
我有一个arrayadapter的列表视图..我需要在我的音乐应用程序中实现它…帮助我
public class Search_Class extends Activity {
EditText searchedit;
ListView listview3;
SongsManager songManager;
Context context;
String[] abc;
ArrayList<String> names;
ArrayList<String> arrayList;
ArrayAdapter<String> ad;
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.my_search);
context = getBaseContext();
searchedit = (EditText) findViewById(R.id.searchedit);
listview3 = (ListView) findViewById(R.id.listview3);
songManager = new SongsManager();
songsList = songManager.getPlayList(context);
names = new ArrayList<String>();
arrayList = new ArrayList<String>();
for (int i = 0; i < songsList.size(); i++) {
HashMap<String, String> obj = songsList.get(i);
names.add(obj.get("songTitle"));
arrayList.add(obj.get("songTitle"));
}
abc = new String[names.size()];
abc = names.toArray(abc);
listview3.setTextFilterEnabled(true);
// ad = new ArrayAdapter<String>(MySearch.this,
// android.R.layout.simple_list_item_1, abc);
// listview3.setAdapter(ad);
listview3.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting listitem index
String[] abc1 = new String[arrayList.size()];
abc1 = arrayList.toArray(abc);
int songIndex;
for (int i = 0; i < abc1.length; i++) {
if (abc[position].equalsIgnoreCase(abc1[i])) {
songIndex = i;
Intent in = new Intent(Search_Class.this,
MainActivity.class);
// Sending songIndex to PlayerActivity
SharedPreferences sp;
sp = getSharedPreferences("lastplayed", MODE_PRIVATE);
Editor edit = sp.edit();
edit.putBoolean("searchSongIndex", true);
edit.commit();
in.putExtra("songIndex", songIndex);
in.putExtra("FLAG", true);
startActivity(in);
finish();
break;
}
}
}
});
// ad.notifyDataSetChanged();
searchedit.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
// MySearch.this.ad.getFilter().filter(arg0);
String text = arg0.toString().toLowerCase(Locale.getDefault());
filter(text);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
}
public void filter(String charText) {
System.out.println("Text---" + charText);
charText = charText.toLowerCase(Locale.getDefault());
names.clear();
if (charText.length() == 0) {
System.out.println("if---" + arrayList.size());
abc = new String[arrayList.size()];
abc = arrayList.toArray(abc);
// names.addAll(arrayList);
} else {
System.out.println("else");
for (int i = 0; i < abc.length; i++) {
System.out.println(abc[i] + "----" + charText);
if (abc[i].toLowerCase(Locale.getDefault()).contains(charText)) {
names.add(abc[i]);
}
}
abc = new String[names.size()];
abc = names.toArray(abc);
}
ad = new ArrayAdapter<String>(Search_Class.this,
android.R.layout.simple_list_item_1, abc);
listview3.setAdapter(ad);
ad.notifyDataSetChanged();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
return false;
}
}
Just Created A Custom `Listview` Using `ListActivity`
public class SearchingClass extends ListActivity {
EditText et;
ListView lv;
Context context;
ArrayList<String> AllSongs;
String[] AllSongsArray;
SongsManager songManager;
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
SearchClass_Adapter adapter;
int textlength = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_searching_class);
et = (EditText) findViewById(R.id.EditText01);
lv = (ListView) findViewById(android.R.id.list);
context = getBaseContext();
songManager = new SongsManager();
songsList = songManager.getPlayList(context);
AllSongs = new ArrayList<String>();
for (int i = 0; i < songsList.size(); i++) {
HashMap<String, String> obj = songsList.get(i);
AllSongs.add(obj.get("songTitle"));
}
AllSongsArray = new String[AllSongs.size()];
AllSongsArray = AllSongs.toArray(AllSongsArray);
setListAdapter(new bsAdapter(this));
et.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
// Abstract Method of TextWatcher Interface.
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// Abstract Method of TextWatcher Interface.
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
textlength = et.getText().length();
AllSongs.clear();
for (int i = 0; i < AllSongsArray.length; i++) {
if (textlength <= AllSongsArray[i].length()) {
/***
* If you want to highlight the countries which start
* with entered letters then choose this block. And
* comment the below If condition Block
*/
/*
* if(et.getText().toString().equalsIgnoreCase( (String)
* listview_names[i].subSequence(0, textlength))) {
* array_sort.add(listview_names[i]);
* image_sort.add(listview_images[i]); }
*/
/***
* If you choose the below block then it will act like a
* Like operator in the Mysql
*/
if (AllSongsArray[i].toLowerCase().contains(
et.getText().toString().toLowerCase().trim())) {
AllSongs.add(AllSongsArray[i]);
}
}
}
AppendList(AllSongs);
}
});
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), AllSongs.get(position),
Toast.LENGTH_SHORT).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.searching_class, menu);
return true;
}
public void AppendList(ArrayList<String> str) {
setListAdapter(new bsAdapter(this));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class bsAdapter extends BaseAdapter {
Activity cntx;
public bsAdapter(Activity context) {
// TODO Auto-generated constructor stub
this.cntx = context;
}
public int getCount() {
// TODO Auto-generated method stub
return AllSongs.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return AllSongs.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return AllSongs.size();
}
public View getView(final int position, View convertView,
ViewGroup parent) {
View row = null;
LayoutInflater inflater = cntx.getLayoutInflater();
row = inflater.inflate(R.layout.listview_item, null);
TextView tv = (TextView) row.findViewById(R.id.tv_artist_name);
tv.setText(AllSongs.get(position));
return row;
}
}
}
解决方法:
首先添加两个函数getData并将Data Search设置为baseadapter
public class bsAdapter extends BaseAdapter {
Activity cntx;
public bsAdapter(Activity context) {
// TODO Auto-generated constructor stub
this.cntx = context;
}
public int getCount() {
// TODO Auto-generated method stub
return AllSongs.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return AllSongs.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return AllSongs.size();
}
public void setDataSearch(String data) {
this.search = data;
}
public String getData() {
return this.search;
}
首先在Search_class中声明searchData
public String searchData;
private bsAdapter mAdapter;
并声明
mAdapter = new bsAdapter(this);
然后在文本观察器中添加条件
public void onTextChanged(CharSequence s, int start, int before,
int count) {
textlength = et.getText().length();
AllSongs.clear();
for (int i = 0; i < AllSongsArray.length; i++) {
if (textlength <= AllSongsArray[i].length()) {
if (AllSongsArray[i].toLowerCase().contains(
et.getText().toString().toLowerCase().trim())) {
AllSongs.add(AllSongsArray[i]);
}
}
if (textlength == 0) {
mAdapter.setDataSearch(null);
} else {
searchData = s.toString().toLowerCase();
mAdapter.setDataSearch(SearchData);
}
}
AppendList(AllSongs);
}
然后将此功能放在baseadapter中
public static CharSequence highlight(String search, String originalText) {
String normalizedText = Normalizer.normalize(originalText, Normalizer.Form.NFD).replaceAll("\\p{InCombiningDiacriticalMarks}+", "").toLowerCase();
int start = normalizedText.indexOf(search);
Spannable highlighted = new SpannableString(originalText);
if (start < 0) {
// not found, nothing to to
return originalText;
} else {
while (start >= 0) {
int spanStart = Math.min(start, originalText.length());
int spanEnd = Math.min(start + search.length(), originalText.length());
highlighted.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), spanStart, spanEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
highlighted.setSpan(new ForegroundColorSpan(cntx.getResources().getColor(R.color.text_color_white)), spanStart, spanEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
start = normalizedText.indexOf(search, spanEnd);
}
return highlighted;
}
}
并把这个
public View getView(final int position, View convertView,
ViewGroup parent) {
View row = null;
LayoutInflater inflater = cntx.getLayoutInflater();
row = inflater.inflate(R.layout.listview_item, null);
TextView tv = (TextView) row.findViewById(R.id.tv_artist_name);
if(search != null){
tv.setText(highlight(search,AllSongs.get(position));
}
else if (search == null){
tv.setText(AllSongs.get(position));
}
return row;
标签：android,listview,spannable 来源： https://codeday.me/bug/20191010/1883148.html