我已经花了3个小时试图解决这个问题，但似乎我无法解决。
我的问题是我无法点击ListView中的项目。我在其他活动中使用完全相同的代码，我确实可以点击它们。我无法弄清楚发生了什么。
这是我的代码：
ListViewXML
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="razvitrance.ownnavdrawertest.PantallaAdministrarMedicamentos"
android:id="@+id/drawerLayout">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="15dp"
android:gravity="center|top">
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Añadir Cita"
android:id="@+id/aniadirCitaAdministrarButton"
android:focusable="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Citas pendientes"
android:id="@+id/textView10"
android:textSize="24dp" />
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/citasPendientes" />
</LinearLayout>
<ListView
android:background="@color/appBackground"
android:id="@+id/navDrawerList"
android:layout_width="300dp"
android:layout_height="fill_parent"
android:layout_gravity="start">
</ListView>
</android.support.v4.widget.DrawerLayout>
我用于在ListView中显示的项目：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageButton
android:layout_width="71dp"
android:layout_height="71dp"
android:id="@+id/imageButton"
android:background="@drawable/ic_calendario" />
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="@+id/mostrarLugarCitaListView"
android:textStyle="italic" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="@+id/mostrarFechaCitaListView" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="@+id/mostrarHoraCitasListView" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
最后是我完全设置的课程。我通过httpPost访问数据库，这就是我使用线程的原因。
package razvitrance.ownnavdrawertest;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Environment;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class PantallaAdministrarCitas extends NavDrawerSetup implements View.OnClickListener {
private Button añadirCitas;
private ListView citasPendietesList;
private ArrayList<HashMap<String, String>> listaCitas;
private ArrayList<String> indiceCitas, arrayNombreCitas;
private final String TAG_SUCCESS = "success", TAG_CITAS = "citas", TAG_INDICE = "CitasID", TAG_DNI = "DNI", TAG_LUGAR = "lugar", TAG_FECHA = "Fecha", TAG_HORA = "hora";
private Long lastSelectedId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pantalla_administrar_citas);
super.onCreateDrawer();
citasPendietesList = (ListView) findViewById(R.id.citasPendientes);
registerForContextMenu(citasPendietesList);
new CargarCitas().execute();
añadirCitas = (Button) findViewById(R.id.aniadirCitaAdministrarButton);
añadirCitas.setOnClickListener(this) ;
}
@Override
public void onCreateContextMenu (ContextMenu menu, View v, ContextMenu.ContextMenuInfo
menuInfo){
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;
lastSelectedId = info.id;
menu.add("BORRAR");
}
@Override
public boolean onContextItemSelected (MenuItem item){
if (item.getTitle() == "BORRAR") {
//Le pasamosal thread el parámetro como argumento de su método doInBackground. Estará en params[0]
new BorrarCita().execute(indiceCitas.get(lastSelectedId.intValue()), arrayNombreCitas.get(lastSelectedId.intValue()));
Toast.makeText(this, "Cita borrado.", Toast.LENGTH_SHORT).show();
finish();
//todo || no sé si esta es la mejor forma de refrescar la listView, por el momento no me funciona otra.
Intent refrescarPantalla = new Intent(getApplicationContext(), PantallaAdministrarMedicamentos.class);
startActivity(refrescarPantalla);
}
return (super.onOptionsItemSelected(item));
}
@Override
public void onClick (View v){
switch (v.getId()) {
case R.id.aniadirCitaAdministrarButton:
finish();
Intent aniadirCitas = new Intent(getApplicationContext(),PantallaAniadirCitas.class);
startActivity(aniadirCitas);
break;
}
}
@Override
public boolean onCreateOptionsMenu (Menu menu){
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_pantalla_administrar_citas, menu);
return true;
}
@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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class CargarCitas extends AsyncTask<String, String, String> {
protected String doInBackground(String... args) {
//Hay que añadirle las comillas "DNI" para hacer la búsqueda SELECT *FROM historial WHERE DNI = "DNI"
String dni = PantallaMenuPrincipal.dniUsuario;
listaCitas = new ArrayList<>();
indiceCitas = new ArrayList<>();
arrayNombreCitas = new ArrayList<>();
JSONParser jsonParser = new JSONParser();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair(TAG_DNI, dni));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(VariablesDeConexion.ObtenerCitasURL,
"POST", params);
// check log cat for response
Log.e("MEDICAMENTOS", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
//Toast.makeText(PantallaNuevoUsuario.this, "Usuario añadido correctamente.", Toast.LENGTH_SHORT).show();
JSONArray medicamentos = json.getJSONArray(TAG_CITAS);
// looping through All Products
for (int i = 0; i < medicamentos.length(); i++) {
JSONObject c = medicamentos.getJSONObject(i);
// Storing each json item in variable
String lugar = "Cita en: " + c.getString(TAG_LUGAR);
String hora = "Hora: " + c.getString(TAG_HORA);
String fecha = "El día: " + c.getString(TAG_FECHA);
String indice = c.getString(TAG_INDICE);
String nombre = (c.getString(TAG_DNI) + c.getString(TAG_HORA).replace(":", "-")).trim();
Log.e("NOMBRE CREADO PARA COMPARACIÓN", nombre);
indiceCitas.add(indice);
arrayNombreCitas.add(nombre);
// creating new HashMap
HashMap<String, String> map = new HashMap<>();
// adding each child node to HashMap key => value
map.put(TAG_LUGAR, lugar);
map.put(TAG_HORA, hora);
map.put(TAG_FECHA, fecha);
// adding HashList to ArrayList
listaCitas.add(map);
}
} else {
// failed to create product
//Toast.makeText(PantallaNuevoUsuario.this, "Error al añadir usuario.", Toast.LENGTH_SHORT).show();
finish();
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
SimpleAdapter adapter = new SimpleAdapter(
PantallaAdministrarCitas.this, listaCitas,
R.layout.list_items_mostrarcitas, new String[]{TAG_LUGAR,
TAG_HORA, TAG_FECHA},
new int[]{R.id.mostrarLugarCitaListView, R.id.mostrarHoraCitasListView, R.id.mostrarFechaCitaListView});
// updating listview
citasPendietesList.setAdapter(adapter);
}
}
class BorrarCita extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
borrarCita(params[1]);
//En params[0] estará el MedId que quiero borrar ya que se ha pasado como parámetro.
JSONParser jsonParser = new JSONParser();
// Obtener los parámetros
List<NameValuePair> parameters = new ArrayList<NameValuePair>();
parameters.add(new BasicNameValuePair(TAG_INDICE, params[0]));
Log.e("ESTO ES LO QUE SE LA PASA TAL CUAL AL MÉTODO POST", TAG_INDICE + params[0]);
//JSONObject json = jsonParser.getJSONFromUrl(loginURL, params);
//String loginURL = "http://192.168.0.13//android/IndexLogin.php";
JSONObject json = jsonParser.makeHttpRequest(VariablesDeConexion.BorrarCitaURL, "POST", parameters);
Log.d("Create Response Razvi -> Esto es lo que se recibe :", json.toString());
return null;
}
private void borrarCita(String Name) {
File f = new File(Environment.getExternalStorageDirectory().getPath() + "/Med/" + extractorLastUser() + "/Citas/" + Name);
if (f.exists()) {
f.delete();
}
}
private String extractorLastUser() {
try {
File f;
FileReader lectorArchivo;
f = new File(Environment.getExternalStorageDirectory().getPath() + "/Med/last_user");
f.setReadable(true);
lectorArchivo = new FileReader(f);
BufferedReader br = new BufferedReader(lectorArchivo);
String l = "";
String aux = "";/*variable auxiliar*/
while (true) {
aux = br.readLine();
if (aux != null) {
l = l + aux + "";
} else {
br.close();
lectorArchivo.close();
return l;
}
}
} catch (IOException e) {
System.out.println("Error:" + e.getMessage());
return null;
}
}
}
}
如果有人发现错误我非常感谢。
答案 0 :(得分：0)
您必须比较您的menuItem标题：
if(item.getTitle().toString().equals("BORRAR"))
如果您需要比较字符串或文本，则只能将其与equals（）
进行比较答案 1 :(得分：0)
我终于找到了解决方案。
问题是ImageView。我不知道为什么，但这个imageview打破了整个列表视图。它已正确显示，但无法单击任何项目。我只是删除了imageview，没有给出任何问题。