Java 如何为ListAdapter实现方法getFilter
我想在一个名为medical-u的移动应用程序中实现一个搜索功能，这是一个医学应用程序，具有搜索医院和全科医生（印度尼西亚语为puskesmas）的搜索功能。我想在ListView上使用EditText添加搜索功能。 在internet上的教程和文档中，使用的适配器是Java 如何为ListAdapter实现方法getFilter,java,android,Java,Android,我想在一个名为medical-u的移动应用程序中实现一个搜索功能，这是一个医学应用程序，具有搜索医院和全科医生（印度尼西亚语为puskesmas）的搜索功能。我想在ListView上使用EditText添加搜索功能。 在internet上的教程和文档中，使用的适配器是ArrayAdapter，而在我的项目中，我使用ListAdapter，搜索列表从雅加达URL API检索数据。 文档中的getFilter仅适用于所有教程和免费文档中的ArrayAdapter，而我在这里使用的是ListAdapt
ArrayAdapterListAdaptergetFilterArrayAdapterListAdapterpublic class RumahSakitMain extends AppCompatActivity {
ProgressBar pbMain;
ArrayList<HashMap<String, String>> listrs;
//ori "http://api.jakarta.go.id/v1/rumahsakitumum/"
//cadangan "https://api.jakarta.go.id/v1/rumahsakitumum/1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30?format=geojson"
String url = "http://api.jakarta.go.id/v1/rumahsakitumum/";
SearchView svs;
// Edit Search Text
private EditText searchText;
ListAdapter ladapter ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rumah_sakit_main);
// date
TextView tanggal = (TextView) findViewById(R.id.tanggal);
SimpleDateFormat formattgl = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss z");
String currentDateandTime = formattgl.format(new Date());
tanggal.setText("Penarikan Data Terakhir :\n"+currentDateandTime);
// hospital search text
searchText = (EditText)findViewById(R.id.edtSearch);
// hospital list
listrs = new ArrayList<>();
final ListView lv = (ListView) findViewById(R.id.listViewDaftar);
pbMain = (ProgressBar) findViewById(R.id.loadingBar);
pbMain.setVisibility(View.VISIBLE);
final AlertDialog.Builder dialog = new AlertDialog.Builder(RumahSakitMain.this);
dialog.setCancelable(false);
// refresh button
Button btnRefreshRS = (Button)findViewById(R.id.btnRefreshRS);
btnRefreshRS.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent refresh = new Intent(getApplicationContext(), tungguRS.class);
startActivity(refresh);
RumahSakitMain.this.finish();
}
});
View footerView = ((LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.footer_layout, null, false);
lv.addFooterView(footerView, null, false);
//Volley, untuk penarikan data dari API, week 11
RequestQueue q = Volley.newRequestQueue(RumahSakitMain.this);
StringRequest sr = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
// get JSON data, week 11
try {
// String judul = "Rumah Sakit";
JSONObject obj = new JSONObject(response);
JSONArray data = obj.getJSONArray("data");
for (int i = 0 ; i < data.length(); i++) {
JSONObject a = data.getJSONObject(i);
String judul = a.getString("jenis_rsu");
String namars = a.getString("nama_rsu");
String id = a.getString("id");
String kode_pos = a.getString("kode_pos");
String email = a.getString("email");
String website = a.getString("website");
JSONObject b = a.getJSONObject("location");
String alamatrs = b.getString("alamat");
JSONArray c = a.getJSONArray("telepon");
String telepon = (String) c.get(0);
// Week 11
HashMap<String, String> map = new HashMap<>();
map.put("id", id);
map.put("namaRS", namars);
map.put("jenis", judul);
map.put("alamatRS", alamatrs);
map.put("kodepos", kode_pos);
map.put("email", email);
map.put("website", website);
map.put("telepon", telepon);
map.put("id", id);
listrs.add(map);
}
pbMain.setVisibility(View.INVISIBLE);
ladapter = new SimpleAdapter(RumahSakitMain.this, listrs, R.layout.layoutdaftar, new String[]{"jenis", "namaRS", "alamatRS", "telepon"}, new int[]{R.id.judulnya, R.id.txtNama, R.id.txtAlamat, R.id.txtTelepon});
lv.setAdapter(ladapter);
Toast.makeText(RumahSakitMain.this, "Penarikan Data Berhasil!", Toast.LENGTH_LONG).show();
} catch (Exception e) {
Log.e("Traffic API padat ", e.toString());
pbMain.setVisibility(View.INVISIBLE);
RumahSakitMain.this.finish();
Intent traffic = new Intent(getApplicationContext(), trafficRS.class);
startActivity(traffic);
/*
dialog.setTitle("Kendala Teknis!");
dialog.setMessage("Penarikan data dari server pusat gagal!");
dialog.setPositiveButton("Refresh", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//finish();
//System.exit(0);
Intent refresh = new Intent(getApplicationContext(), RumahSakitMain.class);
startActivity(refresh);
}
});
dialog.setNegativeButton("Kembali ke Menu Utama", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent utama = new Intent(getApplicationContext(), MainActivity.class);
startActivity(utama);
}
});
dialog.show();
*/
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("Internet tidak aktif", error.toString());
RumahSakitMain.this.finish();
Intent internet = new Intent(getApplicationContext(), internetRS.class);
startActivity(internet);
/*
dialog.setTitle("Gagal Terhubung!");
dialog.setMessage("Cek Koneksi Internet Anda!");
dialog.setPositiveButton("Refresh", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//finish();
//System.exit(0);
Intent refresh = new Intent(getApplicationContext(), RumahSakitMain.class);
startActivity(refresh);
}
});
dialog.setNegativeButton("Kembali ke Menu Utama", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent utama = new Intent(getApplicationContext(), MainActivity.class);
startActivity(utama);
}
});
dialog.show();
*/
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("Content-Type", "application/geojson");
params.put("Authorization", "Jii+apzvYMt2DWzwEYUvLM4ClHAH1JbE5ro/9eQYpOyvVoaykaOGzwHrU2s/Xyr8\n");
return params;
}
};
q.add(sr);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String nama = listrs.get(position).get("namaRS");
String alamat = listrs.get(position).get("alamatRS");
String telp = listrs.get(position).get("telepon");
String web = listrs.get(position).get("website");
String email = listrs.get(position).get("email");
String judul = listrs.get(position).get("jenis");
//detail fraga = new detail();
//Bundle args = new Bundle();
//args.putString("nama",nama);
//args.putString("alamat",alamat);
//args.putString("telp",telp);
//args.putString("web",web);
//args.putString("email",email);
//fraga.setArguments(args);
Intent keDetail = new Intent(RumahSakitMain.this, RumahSakitDetail.class);
keDetail.putExtra("jenis", judul);
keDetail.putExtra("nama", nama);
keDetail.putExtra("alamat", alamat);
keDetail.putExtra("telp", telp);
keDetail.putExtra("web", web);
keDetail.putExtra("email", email);
startActivity(keDetail);
// FragmentManager fm = getSupportFragmentManager();
// FragmentTransaction ft = fm.beginTransaction();
// ft.replace(R.id.frame,fraga);
//ft.addToBackStack(null);
//ft.commit();
//Intent intent = new Intent(RumahSakitMain.this, RumahSakitDetail.class);
//intent.putExtra("data", json.toString());
//startActivity(intent);
}
});
您需要使用自定义适配器。创建一个扩展ListAdapter的适配器并自己实现getFilter（）。那么，如何为列表适配器创建自定义适配器？如果您只需要此适配器来过滤在
列表视图中显示的内容，您可以使用ArrayAdapter
的源代码作为指南：。最后是ArrayFilter
类和getFilter（）
方法。如果这只是在您的代码中使用，那么这两件事情就是您真正需要的，但是如果您将适配器
与某些框架API一起使用，那么您可能也必须实现可过滤的
，这就是getFilter（）
方法。
searchText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
// the error is on getFilter(), because it's red colored
// it show "cannot resolve method getFilter"
RumahSakitMain.this.ladapter.getFilter().filter(charSequence);
}
@Override
public void afterTextChanged(Editable editable) {
}
});
}
@Override
public void onBackPressed() {
final AlertDialog.Builder dialog = new AlertDialog.Builder(RumahSakitMain.this);
dialog.setTitle("Menu ");
dialog.setMessage("Apa yang ingin Anda lakukan?");
dialog.setPositiveButton("Refresh", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//finish();
//System.exit(0);
Intent refresh = new Intent(getApplicationContext(), tungguRS.class);
startActivity(refresh);
Toast.makeText(RumahSakitMain.this, "Refresh", Toast.LENGTH_LONG).show();
RumahSakitMain.this.finish();
}
});
dialog.setNegativeButton("Kembali ke Menu Utama", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent utama = new Intent(getApplicationContext(), MainActivity.class);
startActivity(utama);
RumahSakitMain.this.finish();
}
});
dialog.setNeutralButton("Batal", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(RumahSakitMain.this, "Batal", Toast.LENGTH_LONG).show();
}
}).show();
}
}