无法在AlertDialog - Android中显示Spinner DropDown列表
我在AlertDialog中有两个微调器，微调器看起来很好，项目列表是正确的，它显示了每个列表的第一项。但是当我单击两个微调器中的任何一个时，下拉列表不会显示以选择其他一些项目。纺纱厂什么都不做。当我在AlertDialog之外的两个微调器时，这不会发生。
这是AlertDialog的代码：
private void mostrar_alertdialog_spinners() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
TextView title = new TextView(this);
title.setText("Selecciona un archivo:");
title.setPadding(10, 10, 10, 10);
title.setGravity(Gravity.CENTER);
title.setTextColor(Color.rgb(0, 153, 204));
title.setTextSize(23);
builder.setCustomTitle(title);
LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout_spinners = inflater.inflate(R.layout.layout_spinners,null);
sp_titulos_carpetas = (Spinner) layout_spinners.findViewById(R.id.spinner_titulo_carpetas);
sp_titulos_textos = (Spinner) layout_spinners.findViewById(R.id.spinner_textos_carpetas);
builder.setView(layout_spinners);
builder.setCancelable(false);
builder.show();
//configuracion de textos en memoria sd
String path = Environment.getExternalStorageDirectory().toString()+"/Textos/";
File f = new File(path);
String[] fileStr = f.list();
ArrayList<String> lista_lista_CARPETAS = new ArrayList<String>();
for (String lista_texto : fileStr) {
lista_lista_CARPETAS.add(lista_texto);
}
Collections.sort(lista_lista_CARPETAS, new AlphanumComparator());
String[] lista_k = f.list(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
File f = new File(dir, name);
return f.isDirectory();
}
});
FileFilter fileFilter = new FileFilter() {
public boolean accept(File file) {
return file.isDirectory();
}
};
File[] files = f.listFiles(fileFilter);
ArrayAdapter<String> carpetas = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, lista_k);
carpetas.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
sp_titulos_carpetas.setAdapter(carpetas);
//ARRAY CON TITULOS DE ARCHIVOS TXT
String camino = Environment.getExternalStorageDirectory().toString()+"/Textos/" + "Naxos"+ "/";
File t = new File(camino);
String[] lista_textos = t.list();
ArrayList<String> lista_lista_textos = new ArrayList<String>();
for (String lista_texto : lista_textos) {
if (lista_texto.toLowerCase().endsWith(".txt")) {
lista_lista_textos.add(lista_texto);
}
}
for (int index =0; index < lista_lista_textos.size(); index++){
lista_lista_textos.set(index, WordUtils.capitalizeFully(lista_textos[index].toLowerCase().replace(".txt", "")));
}
Collections.sort(lista_lista_textos, new AlphanumComparator());
ArrayAdapter<String> adaptador_textos = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, lista_lista_textos);
adaptador_textos.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
sp_titulos_textos.setAdapter(adaptador_textos);
sp_titulos_textos.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String nombre_texto = parent.getSelectedItem().toString();
File sdcard = new File( Environment.getExternalStorageDirectory().toString()+"/Textos/" + "Naxos/");
//Get the text file
File file = new File(sdcard, nombre_texto);
//Read text from file
StringBuilder text = new StringBuilder();
int BUFFER_SIZE = 8192;
try {
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file), "Cp1252"),BUFFER_SIZE);
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
}
catch (IOException e) {
//You'll need to add proper error handling here
}
String nuevoTexto = text.toString().replaceAll("\t", " ");
String nuevoTextoA = nuevoTexto.replaceAll("\n", " ");
Holmes1 = nuevoTextoA;
delimitadores = " ";
tokenHolmes1 = new StringTokenizer(Holmes1, " ");
arrayHolmes1 = Holmes1.split(delimitadores);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
旋转器的xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="100"
style="@style/spinner_rojo">
<Spinner
android:id="@+id/spinner_titulo_carpetas"
android:layout_width="0dp"
style="@style/spinner_rojo"
android:background="@drawable/spinner_background_holo_light"
android:layout_height="wrap_content"
android:layout_weight="50"></Spinner>
<Spinner
android:id="@+id/spinner_textos_carpetas"
android:layout_width="0dp"
style="@style/spinner_rojo"
android:background="@drawable/spinner_background_holo_light"
android:layout_height="wrap_content"
android:layout_weight="50"></Spinner>
</LinearLayout>
一张图片：
任何人都知道任何可能出现的下拉列表？
4 个答案:
答案 0 :(得分：2)
我刚刚复制了你的代码并编辑了ArrayList。它完全适合我。
private void mostrar_alertdialog_spinners() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
TextView title = new TextView(this);
title.setText("Selecciona un archivo:");
title.setPadding(10, 10, 10, 10);
title.setGravity(Gravity.CENTER);
title.setTextColor(Color.rgb(0, 153, 204));
title.setTextSize(23);
builder.setCustomTitle(title);
LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout_spinners = inflater.inflate(R.layout.spinner_layout,null);
Spinner sp_titulos_carpetas = (Spinner) layout_spinners.findViewById(R.id.spinner_titulo_carpetas);
Spinner sp_titulos_textos = (Spinner) layout_spinners.findViewById(R.id.spinner_textos_carpetas);
builder.setView(layout_spinners);
builder.setCancelable(false);
builder.show();
ArrayList<String> lista_k = new ArrayList<String>();
lista_k.add("Path A");
lista_k.add("Path B");
ArrayAdapter<String> carpetas = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, lista_k);
carpetas.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
sp_titulos_carpetas.setAdapter(carpetas);
ArrayList<String> lista_lista_textos = new ArrayList<String>();
lista_lista_textos.add("Path C");
lista_lista_textos.add("Path D");
ArrayAdapter<String> adaptador_textos = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, lista_lista_textos);
adaptador_textos.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
sp_titulos_textos.setAdapter(adaptador_textos);
sp_titulos_textos.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
答案 1 :(得分：0)
将其移至代码的末尾，因此您在设置完所有内容后执行此操作：
builder.show();
答案 2 :(得分：0)
为其创建自定义警报对话框。试试这个
Dialog new_dialog = new Dialog(getParent());
// new_dialog.setTitle("Book your appointment");
new_dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
new_dialog.setContentView(R.layout.customize_dialog_list_view);
new_dialog.setCancelable(false);
cuc = new CommanUtilityClass();
SharedPreferences sp = getSharedPreferences("provider",0);
String services = sp.getString("services", "");
TextView service = (TextView) new_dialog
.findViewById(R.id.cdlv_service_provider);
TextView hour = (TextView) new_dialog.findViewById(R.id.cdlv_working_hours);
TextView appointment_time = (TextView) new_dialog.findViewById(R.id.cdlv_appoint_time);
TextView appointment_date = (TextView) new_dialog.findViewById(R.id.cdlv_appoint_date);
//String[] ampm = myTiming[which].split(":");
/*String[] range = myTiming[which].split(":");
int startTimeInt = Integer.parseInt(range[0])
* 60 + Integer.parseInt(range[1]);
String finalvalue = "";
if(startTimeInt >= 720){
if(startTimeInt >= 780){
}else{
}
}else{
finalvalue = String.valueOf(range[0] + ":" + range[1] + " AM");
}
for (int i = 0; i < range.length; i++) {
String startTimeString = range[i].split("-")[0];
String endTimeString = range[i].split("-")[1];
Log.d("Minutes", "startTimeString = " + startTimeString);
Log.d("Minutes", "endTimeString = " + endTimeString);
int startTimeInt = Integer.parseInt(startTimeString.split(":")[0])
* 60 + Integer.parseInt(startTimeString.split(":")[1]);
int endTimeInt = Integer.parseInt(endTimeString.split(":")[0]) * 60
+ Integer.parseInt(endTimeString.split(":")[1]);
}*/
appointment_time.setText(Html.fromHtml("<b>Appointment time :</b>" + myTimingToShow[which].split("/")[0]));
appointment_date.setText(Html.fromHtml("<b>Appointment date :</b>" + selected));
service.setText(Html
.fromHtml("<b>Service provider :</b>"
+ cuc.toTheUpperCase(bsp_name)));
hour.setText(Html
.fromHtml("<b>Working hours :</b>"
+ cuc.toTheUpperCase(bsp_availability)));
try {
lv = (ListView) new_dialog
.findViewById(R.id.cdlv_list);
CustomDialogArrayAdapter cdaa = new CustomDialogArrayAdapter(
getApplicationContext(),
m_ArrayList);
lv.setAdapter(cdaa);
} catch (Exception e) {
e.printStackTrace();
}
new_dialog.show();
这里我刚刚将xml布局虚增为警告对话框。确保使用上下文对话框获取每个微调器。请参阅上面的代码。
希望它有所帮助。干杯！
答案 3 :(得分：0)
由于内存泄漏，发生这种情况，当你打开一个微调器时，它能够获得有效的上下文，但是当你第二次尝试检索另一个微调器时，它实际上正在获取{ {1}}作为上下文而不填充任何内容。但是当您在null中使用Activity中的微调器时，它实际上总是得到Alert-Dialog。因此，在那段时间内，您没有收到任何错误，并且填充正确。
因此，为避免内存泄漏，请使用valid context检索微调器ArrayAdapter的上下文
getApplicationContext()
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