Question

这是我在stackoverflow中的第3个问题，因为我不知道如何使用stackoverflow。我的问题是我的论文项目。请帮我... 我有1个listview和1个SearchView。我想在我的Listview中添加搜索过滤器，我的问题是：

我在ListView中显示了一些项目
例如，在第一个列表中我有数据“Aisyah”，在下一个列表中我按名称输入数据“Farhan”，当我输入“FA”时ListView在ListView顶部显示“Farhan”。
但是当我点击时，选择“Aisyah”（ListView中的第一项）而不是“Farhan”

基本上，我们执行搜索后，列表视图中的数据位置不会刷新。但我不知道如何刷新ListView并获得正确的数据位置。

请帮助我...我坚持了好几天。这是我的代码..

public class DosenActivity extends AppCompatActivity implements ListView.OnItemClickListener, SearchView.OnQueryTextListener {
//root url dari webservice
public static final String ROOT_URL = "http://fyptes.esy.es/";
//deklarasi varibel untuk mengirim data ke activity lain
public static final String ID = "id";
public static final String NAMA = "nama";
public static final String SITUS = "situs";
public static final String EMAIL = "email";
public static final String TELEPON = "telepon";
public static final String KANTOR = "kantor";
public static final String JABATAN = "jabatan";
public static final String MATKUL = "matkul";
public static final String FOTO = "foto";
//listview untuk menampilkan data
private ListView listview;
//varibel books bertipe List dan List tersebut berdasarkan objek Listdosen
private List<Listdosen> dosens;
private ArrayAdapter adapter;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dosen);
    Toolbar toolbar=(Toolbar)findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);

    //inisialisasi listview
    listview = (ListView) findViewById(R.id.listViewDosen);

    //memanggil method untuk mengambil data dosen
    getDosen();

    //setting onItemClickListener untuk listview
    listview.setOnItemClickListener(this);


}

private void getDosen() {
    //Ketika Aplikasi mengambil data kita akan melihat progress dialog
    final ProgressDialog loading = ProgressDialog.show(this,"Mengambil Data","Mohon tunggu..",false,false);
    //Logging Interceptor
    HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
    //set Level Log
    logging.setLevel(HttpLoggingInterceptor.Level.BODY);
    OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
    httpClient.addInterceptor(logging);

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(ROOT_URL)
            .addConverterFactory(GsonConverterFactory.create())//GsonConverter untuk parsing json
            .client(httpClient.build())
            .build();

    RestAPI service = retrofit.create(RestAPI.class);

    Call<Model> call = service.loadListDosen();
    call.enqueue(new Callback<Model>() {  //Asyncronous Request
        @Override
        public void onResponse(Call<Model> call, Response<Model> response) {
            loading.dismiss();
            List<Listdosen> dosen = response.body().getListdosen();

            //memasukkan data dari varibel dosen ke dosens
            dosens = dosen;
            //memanggil method untuk menampilkan list
            showList();
        }

        @Override
        public void onFailure(Call<Model> call, Throwable t) {

        }
    });
}

private void showList() {
    //String array untuk menyimpan nama semua nama dosen
    String[] items = new String[dosens.size()];

    for (int i = 0; i < dosens.size(); i++) {
        items[i] = dosens.get(i).getNama();
    }
    //Membuat Array Adapter for listview
    ArrayAdapter adapter = new ArrayAdapter<String>(this, R.layout.activity_dosen_listview, items);

    //setting adapter untuk listview
    listview.setAdapter(adapter);
    listview.setTextFilterEnabled(true);
    adapter.setNotifyOnChange(true);
}

//method ini akan dieksekusi ketikan listitem diklik
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    //membuat intent
    Intent intent = new Intent(this, DosenDetailActivity.class);
    //mengambil dosen dari list
    Listdosen listdosen = dosens.get(position);
    //menambahkan detail dosen untuk intent
    intent.putExtra(ID, listdosen.getId());
    intent.putExtra(NAMA, listdosen.getNama());
    intent.putExtra(SITUS, listdosen.getSitus());
    intent.putExtra(EMAIL, listdosen.getEmail());
    intent.putExtra(TELEPON, listdosen.getTelepon());
    intent.putExtra(KANTOR, listdosen.getKantor());
    intent.putExtra(JABATAN, listdosen.getJabatan());
    intent.putExtra(MATKUL, listdosen.getMatkul());
    intent.putExtra(FOTO, listdosen.getFoto());

    //memulai activity lain untuk menampilkan detail dosen
    startActivity(intent);
}

public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    SearchManager searchManager = (SearchManager) getSystemService( Context.SEARCH_SERVICE );
    SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();

    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    searchView.setOnQueryTextListener(this);
    return super.onCreateOptionsMenu(menu);
}

public boolean onQueryTextChange(String newText) {
    // this is your adapter that will be filtered
    if (TextUtils.isEmpty(newText))
    {
        listview.clearTextFilter();
    }
    else
    {
        listview.setFilterText(newText.toString());
    }

    return true;
}

public boolean onQueryTextSubmit(String query) {
    // TODO Auto-generated method stub
    return false;
}
}

Answer 1

使用以下代码搜索名称，然后根据搜索查询再次填充列表视图。对我来说工作正常。

 edittext.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                textlength = edittext.getText().length();
                ArrayList<HashMap<String, String>> arrayList2 = new ArrayList<HashMap<String, String>>();
                //  arrayList2 = arraylist;

                for (int i = 0; i < arraylist.size(); i++) {

                    username[i] = arraylist.get(i).get("Username");
                    Log.d("unm", username[i]);
                }
                for (int i = 0; i < arraylist.size(); i++) {
                    if (textlength <= username[0].length()) {


                        if (username[i].toLowerCase().contains(
                                edittext.getText().toString().toLowerCase().trim())) {
                            arrayList2.add(arraylist.get(i));
                        }
                    }
                }
                adapter = new ListViewAdapter(getApplicationContext(), arrayList2);

                listview.setAdapter(adapter);


            }


            @Override
            public void afterTextChanged(Editable s) {

            }
        });

Listview过滤器无法使用SearchView，如何使用过滤器更新列表视图？

1 个答案: