I have the following method where I must confirm the user's password before he is allowed to access the Setup menu. To do so, I make him login again because Parse (my cloud storage) doesn't allow me to confirm passwords. So far so good. The problem is when I inflate the view to my AlertDialog to use a custom button and EditText. You can see in my code below that I have commented the Button section, because when I try to get the onClickListener it doesn't work. It just does nothing. So I'm currently using the alertDialogPositiveButton and it's ok. The second problem and the real one is that I cannot retrieve the data insert into the editText. The SUpassword3is always equals to blank, not null. Can someone please help?
method:
public void confirmPassword(){
final LayoutInflater inflateSetup = getLayoutInflater();
AlertDialog.Builder alertSetup = new AlertDialog.Builder(this);
alertSetup.setView(inflateSetup.inflate(R.layout.inflate_setup, null));
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
View viewInflate_setup = inflateSetup.inflate(R.layout.inflate_setup, null);
edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
SUpassword3 = edtPassword3.getText().toString();
final ParseUser beforeConfirmPassword = ParseUser.getCurrentUser();
ParseUser.logInInBackground(beforeConfirmPassword.getUsername(), SUpassword3, new LogInCallback() {
#Override
public void done(ParseUser parseUser, ParseException e) {
if(e==null){
//password confirmed, logout last user and go to next setup
System.out.println("Password [" +SUpassword3+ "] and user [" +beforeConfirmPassword.getUsername()+ "] confirmed, logout last user and go to setup");
beforeConfirmPassword.logOut();
}else{
//passwords don't match
System.out.println("Password don't match: [" +SUpassword3 + "] USER [" +beforeConfirmPassword.getUsername()+ "]");
}
}
});
}
});
final AlertDialog dialogSetup = alertSetup.create();
dialogSetup.show();
/**
btnConfirmPassowod = (Button)viewInflate_setup.findViewById(R.id.btnConfirm);
btnConfirmPassowod.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View v) {
System.out.println("User has clicked the [confirm] button");
final ParseUser beforeConfirmPassword = ParseUser.getCurrentUser();
ParseUser.logInInBackground(beforeConfirmPassword.getUsername(), SUpassword3, new LogInCallback() {
#Override
public void done(ParseUser parseUser, ParseException e) {
if(e==null){
//password confirmed, logout last user and go to next setup
System.out.println("Password confirmed, logout last user and go to setup");
beforeConfirmPassword.logOut();
}else{
//passwords don't match
dialogSetup.dismiss();
Snackbar.make(v, "Wrong password, try again.", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
}
});
}
}); */
}
inflate_setup.xml(the xml file I inflate on the alertDialog)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/edtPassword3"
android:layout_gravity="center_horizontal"
android:hint="#string/EN_txt.confirmPassword"
/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New Button"
android:id="#+id/btnConfirm"
android:layout_gravity="center_horizontal" />
</LinearLayout>
Final version(working):
public void confirmPassword(){
final LayoutInflater inflateSetup = getLayoutInflater();
final View viewInflate_setup = inflateSetup.inflate(R.layout.inflate_setup, null);
AlertDialog.Builder alertSetup = new AlertDialog.Builder(this);
alertSetup.setView(viewInflate_setup);
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
SUpassword3 = edtPassword3.getText().toString();
...
You inflate another view inside your onClickListener. That's why you actually check text of another edtPassword3, not that one which visible for user. It should be something like that:
View view = inflateSetup.inflate(R.layout.inflate_setup;
final EditText edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
alertSetup.setView(view, null));
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
SUpassword3 = edtPassword3.getText().toString();
....
Try to use: Dialog class
// custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.custom);
dialog.setTitle("Title...");
Get a reference of the inflated view:
View dialogView = inflateSetup.inflate(R.layout.inflate_setup, null);
In dialog use:
alertSetup.setView(dialogView);
Then, access button using:
Button myButton = (Button) dialogView.findViewById(R.id.btnConfirm);
Related
I've got an inputDialog, which allows for some text inputs. On clicking save, the inputDialog checks if the entered text is already available (to prevent double entries). If this is the case, a new AlertDialog is created, simply stating "The value you entered already exists", with just an "Ok" button to dismiss this AlertDialog. This all works.
I would like to have the inputDialog pop back up again, after dismissing the AlertDialog, with the values that were entered by the user before still in the editText fields.
I'm not expecting any problems on getting those values back in the editText fields (Store them in a variable on clicking save, if the double entry error occurs, set those variables on the editText's. If I'm doing this in a stupid way, please let me know).
I am however having trouble with getting the first (inputDialog) dialog to come back. The code you see below is the code for my inputDialog fragment (The code is simplified, so if something seems to be missing, it probably is. Let me know, so I can add it back in.)
So, to repeat myself: How can I return to the previous dialog after dismissing the second one?
StuffManagerInputDialogFragment.java:
public class StuffManagerInputDialogFragment extends DialogFragment {
EditText nameInputField;
EditText tagInputField;
DBHandler dbHandler;
StuffManagerFragment f = new StuffManagerFragment();
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
LayoutInflater inflater = getActivity().getLayoutInflater();
final View v_iew = inflater.inflate(R.layout.fragment_inputdialog, null);
nameInputField = (EditText) v_iew.findViewById(R.id.inputdialogname);
tagInputField = (EditText) v_iew.findViewById(R.id.inputdialogtag);
dbHandler = new DBHandler(getActivity(), null, null, 1);
final MainActivity ma = (MainActivity) getActivity();
final AlertDialog.Builder newLinkDialog = new AlertDialog.Builder(getActivity());
newLinkDialog.setView(v_iew)
.setTitle("New Link")
.setPositiveButton("Save", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
String nameInputFieldText = nameInputField.getText().toString();
String tagInputFieldText = tagInputField.getText().toString();
ArrayList<String> nameArray = dbHandler.nameArrayMethod();
ArrayList<String> tagArray = dbHandler.tagArrayMethod();
NavigationView navigationView = (NavigationView) getActivity().findViewById(R.id.nav_view);
Menu menu = navigationView.getMenu();
if (nameArray.contains(nameInputFieldText) || tagArray.contains(tagInputFieldText)) {
if (nameArray.contains(nameInputFieldText) && tagArray.contains(tagInputFieldText)) {
AlertDialog.Builder errorBoth = new AlertDialog.Builder(getActivity())
.setTitle("Error")
.setMessage("The name and tag you entered are already in use.")
.setIcon(R.drawable.ic_error_black)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//Return to previous dialog here
}
});
errorBoth.show();
}
} else {
dbHandler.addLink(nameInputFieldText, tagInputFieldText);
nameArray = dbHandler.nameArrayMethod();
int nameArraySize = (nameArray.size() - 1);
MenuItem item = menu.add(R.id.group1, nameArraySize, 1, nameArray.get(nameArraySize));
Toast.makeText(getContext(), "'" + nameInputFieldText + " - " + tagInputFieldText + "' link saved.", Toast.LENGTH_SHORT).show();
ma.addSMVFFragments();
f.hideDeleteAllButton = false;
getActivity().invalidateOptionsMenu();
}
}
})
.setNegativeButton("Cancel", null);
return newLinkDialog.create();
}
}
A better solution is to have a dialog fragment for your input layout, and that dialog fragment would display an AlertDialog on OK if the text validation fails. The input dialog fragment would not dismiss in this case, it will remain in the background so when you dismiss the alert dialog to tell the user the input is invalid, you return to the input dialog as it was.
To prevent the dialog fragment from dismissing on OK you would override onStart and get a reference to the OK button and set the listener there, like this:
#Override
public void onStart() {
super.onStart();
AlertDialog alertDialog = (AlertDialog) getDialog();
if (alertDialog != null) {
mOKButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
mOkButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (field OK) {
// save data
dismiss();
} else {
// show error dialog
}
}
});
}
}
Making a to-do list. Having 2 issues, The not so important issue is that for some reason I can't see the TextView's that I set up as "labels". The more important thing is that when I click the create new task button, my alert pops up, I can put values in my EditText boxes, but when I hit create, it crashes and I get a NullPointer exception saying I'm trying to call getText() on a null object reference. I can't figure out if I'm inflating incorrectly or if I'm not linking the EditTexts to the alert properly. The annoying thing is that my edittext alert box works just fine editing existing list items(that I hardcoded for testing). Here's my layout and activity, I commented the line in which it breaks. Sorry about all the Log.d's I'm really trying to visualize how all this works.
The Layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<EditText
android:layout_width="55dp"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="#+id/txtCreatePriority"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="25dp"
android:hint="1"
android:textAlignment="center" />
<EditText
android:layout_width="235dp"
android:layout_height="wrap_content"
android:id="#+id/txtCreateItemContent"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/txtCreatePriority"
android:layout_toEndOf="#+id/txtCreatePriority"
android:layout_marginLeft="15dp"
android:hint="Do Laundry"
android:textAlignment="center" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Priority"
android:id="#+id/lblPriority"
android:layout_above="#+id/txtCreatePriority"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="17dp"
android:textStyle="bold"
android:textSize="23dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Task to-do"
android:id="#+id/lblItemContent"
android:layout_above="#+id/txtCreateItemContent"
android:layout_toRightOf="#+id/lblPriority"
android:layout_toEndOf="#+id/lblPriority"
android:layout_marginLeft="65dp"
android:textStyle="bold"
android:textSize="23dp" />
</RelativeLayout>
The Activity
public class MainActivity extends AppCompatActivity {
private ListDataSource ds;
private ListView listViewToDo;
private Button btnAddNew;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Context context = this;
Log.d("MainActivity","Attempting to create data source");
try {
ds = new ListDataSource();
}
catch(Exception e)
{
e.printStackTrace();
Log.d("MainActivity","Failed to create data source");
}
btnAddNew = (Button)findViewById(R.id.btnAddNew);
Log.d("Main Activity","Attempting to link empty list view to on screen view");
listViewToDo = (ListView)findViewById(R.id.listOfLists);
Log.d("Main Activity", "Views linked, Attempting to set adapter to listView");
listViewToDo.setAdapter(new ListDataSourceAdapter(this, ds));
Log.d("Main Activity", "Successfully set Adapter");
btnAddNew.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("addItem", "Entered onclick, Attempting to create AlertDialog");
AlertDialog.Builder addItem = new AlertDialog.Builder(context);
Log.d("addItem", "AlertDialog Built, attempting to create inflater");
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
addItem.setView(inflater.inflate(R.layout.create_item_layout, null));
Log.d("addItem", "inflater built linking text boxes");
final TextView txtCreatePriority = (TextView)findViewById(R.id.txtCreatePriority);
final TextView txtCreateCellContent = (TextView)findViewById(R.id.txtCreateItemContent);
final TextView lblPriority = (TextView)findViewById(R.id.lblPriority);
final TextView lblItemContent = (TextView)findViewById(R.id.lblItemContent);
addItem.setTitle("Create new item");
addItem
.setCancelable(false)
.setPositiveButton("Create", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.d("editText onClick", "in onClick method, preparing to add entry");
// This is where the code breaks
ds.getList().add(Integer.valueOf(txtCreatePriority.getText().toString()), new CellContent(Integer.valueOf(txtCreatePriority.getText().toString()) + 1, txtCreateCellContent.getText().toString().trim()));
Log.d("editText onClick", "added new entry");
ListDataSourceAdapter adapter = new ListDataSourceAdapter(context, ds);
Log.d("editText onClick", "reestablished link to adapter");
listViewToDo.setAdapter(adapter);
Log.d("editText onClick", "adapter set");
adapter.notifyDataSetChanged();
Log.d("editText onClick", "DataSetChanged");
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = addItem.create();
alertDialog.show();
}
});
// add button listener
listViewToDo.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, final int position, long id)
{
AlertDialog.Builder editItem = new AlertDialog.Builder(context);
final EditText edittext = new EditText(context);
editItem.setTitle("Change item");
editItem
.setMessage("Set new todo item")
.setView(edittext)
.setCancelable(false)
.setPositiveButton("Submit", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
Log.d("editText onClick","in onClick method, preparing to remove previous entry");
ds.getList().remove(position);
Log.d("editText onClick", "removed previous entry");
ds.getList().add(position, new CellContent(position + 1, edittext.getText().toString().trim()));
Log.d("editText onClick", "added new entry");
ListDataSourceAdapter adapter = new ListDataSourceAdapter(context,ds);
Log.d("editText onClick","reestablished link to adapter");
listViewToDo.setAdapter(adapter);
Log.d("editText onClick", "adapter set");
adapter.notifyDataSetChanged();
Log.d("editText onClick", "DataSetChanged");
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = editItem.create();
alertDialog.show();
}
});
}
}
The Error
java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
You're calling "(EditText)v.findViewById" on the view v.
The view v is the view passed back in the onClickListener, which is the button itself.
Since that button does not contain the EditTexts within it, those views are null. And crash when you try to access them.
I'm a little uncertain where the layout with the edit texts is in this code. Is it in the same layout as the listview, or in create_item_layout?
If its create_item_layout, that needs to be inflated before getting the EditTexts. Use the view you inflate to findViewById.
I need to show an AlertDialog with "Don't Show Again" checkbox. I searched, but I couldn't find a working solution :/
final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
PackageManager pk = getPackageManager();
Drawable icon;
alertDialogBuilder
.setTitle(R.string.confirm)
.setPositiveButton(R.string.close, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
//Do something
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
If i'm not wrong then just Make one class extends with View.
public class DialogShow extends View {
SharedPreferences dialogPreferences;
String prefrencestring;
CheckBox nevershowagain;
Button closedialog;
Dialog dialog;
View view;
public DialogShow(final Context context) {
super(context);
dialog = new Dialog(context);
view = View.inflate(context, R.layout.startdialog, null);
dialog.setContentView(view);
nevershowagain = (CheckBox) view.findViewById(R.id.nevershowagain);
closedialog = (Button) view.findViewById(R.id.closedialog);
closedialog.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (nevershowagain.isChecked()) {
prefrencestring = "1";
dialogPreferences = PreferenceManager
.getDefaultSharedPreferences(context);
Editor editprefrences = dialogPreferences.edit();
editprefrences.putString("showdialog", prefrencestring);
editprefrences.commit();
}
dialog.dismiss();
}
});
dialogPreferences = PreferenceManager
.getDefaultSharedPreferences(context);
String check = dialogPreferences.getString("showdialog", "");
if (check.equals("1")) {
} else {
dialog.show();
}
}
}
Now call this class in your splash Activity on onCreate() method..
DialogShow d = new Dialog(this);
You can try this for AlertDialog :
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.myDialogLayout, null));
Dialog d = builder.create();
Edit: Please look into HERE FOR DETAILS EXPLANATION
Pass your view to the setView() method and it will set your view to the dialog body.
alertDialogBuilder.setView(your_view);
Since the accepted answer is not a good one in 2023 (IMO) and this post is the first one on google search, here is my solution:
private void showAlertWithCheck() {
boolean infoShowed = PreferenceManager.getDefaultSharedPreferences(this).
getBoolean(Const.PREF_KEY_INFO_SHOWN, false);
if (!infoShowed) {
View view = getLayoutInflater().inflate(R.layout.dialog_remember_check, null);
final CheckBox chk_drc_Remember = view.findViewById(R.id.chk_drc_Remember);
chk_drc_Remember.setText(R.string.dont_show_again);
chk_drc_Remember.setChecked(true);
new AlertDialog.Builder(MainActivity.this).
setIcon(android.R.drawable.ic_dialog_info).
setMessage(R.string.fixed_info).
setView(view).
setNeutralButton(R.string.caption_ok, null).
setOnDismissListener(dialog ->
PreferenceManager.getDefaultSharedPreferences(this).edit().
putBoolean(Const.PREF_KEY_INFO_SHOWN,
chk_drc_Remember.isChecked()).apply()).
show();
}
}
requied view XML:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
android:orientation="vertical"
android:padding="#dimen/dialog_padding"
tools:context=".dialogs.PrayTimeDetailDialog"
tools:ignore="RtlHardcoded">
<CheckBox
android:id="#+id/chk_drc_Remember"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:paddingLeft="#dimen/dialog_padding"
android:paddingRight="#dimen/dialog_padding"
android:text="#string/remember_method" />
So I am creating a custom AlertDialog using the Builder. I have a custom view I am inflating in the dialog with the following layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<EditText android:id="#+id/edit_username"
style="#style/EditPassword"
android:hint="#string/login_username_hint" />
<EditText android:id="#+id/edit_password"
style="#style/EditPassword"
android:hint="#string/login_password_hint" />
</LinearLayout>
The android:layout_height style for the EditText controls is set to "wrap_content". When I show the dialog with this custom view the dialog is stretched to fill the height of the entire screen. No matter what I set the layout_height on the LinearLayout to (including hardcoded pixel values), it still fills the entire screen on my emulator.
I'm hoping there's something simple that I'm missing here?
EDIT: I looked in the Hierarchy Viewer and the layout I included in this question is correctly defined, but it is wrapped within a FrameLayout within a FrameLayout, and the outermost FrameLayout is set to "wrap_content" but is rendering in the Viewer with a bunch of empty space below it.
EDIT 2: As requested, the code that inflates the layout.
protected Dialog onCreateDialog(int id) {
switch(id) {
case AUTHENTICATION_DIALOG:
LayoutInflater inflater = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
final View loginView = inflater.inflate(R.layout.login_dialog, null);
return new AlertDialog.Builder(HomeActivity.this)
.setTitle("Upload profile data")
.setView(loginView)
.setPositiveButton("Upload", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
EditText userName = (EditText)loginView.findViewById(R.id.edit_username);
EditText password = (EditText)loginView.findViewById(R.id.edit_password);
String userNameStr = StringUtils.convertToTrimmedString(userName.getText());
String passwordStr = StringUtils.convertToTrimmedString(password.getText());
if (userNameStr.equals("") || passwordStr.equals("")) {
new AlertDialog.Builder(HomeActivity.this)
.setTitle("Required fields missing")
.setMessage("You must enter a username and password")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
HomeActivity.this.showDialog(AUTHENTICATION_DIALOG);
dialog.dismiss();
}
}).show();
} else {
dialog.dismiss();
} // end if user entered username and password
} // end "Upload" onClick
}) // end setPositiveButton DialogInterface.OnClickListener()
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
} // end "Cancel" onClick
}).create();
default:
return null;
}
}
So I switched to using a RelativeLayout like so:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<EditText android:id="#+id/edit_username"
style="#style/EditPassword"
android:hint="#string/login_username_hint" />
<EditText android:id="#+id/edit_password"
style="#style/EditPassword"
android:layout_below="#+id/edit_username"
android:hint="#string/login_password_hint" />
</RelativeLayout>
and it works fine. I switched back to Linear to test and it exhibited the old broken behavior when I switched back to the LinearLayout. I'm going to leave this answer unmarked in the hopes that someone can tell me why it's freaking out over LinearLayout vs Relative.
I have this .xml file with countries and their countrycodes in them. This is how it looks like:
<?xml version="1.0" encoding="UTF-8"?>
<landen>
<land>
<naam>Afghanistan</naam>
<code>AF</code>
</land>
<land>
<naam>Albani�</naam>
<code>AL</code>
</land>
<land>
<naam>Algerije</naam>
<code>DZ</code>
</land>
<land>
</landen>
Now I want people to choose one country out of an list. I though an AlertDialog would be nice to display everything.
The way i get the values out of my xml-file is like this:
protected ArrayList<Land> getLanden() {
ArrayList<Land> lijst = new ArrayList<Land>();
try {
DocumentBuilder builder =DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(getAssets().open("landenlijst.xml"));
NodeList nl = doc.getElementsByTagName("land");
for (int i=0;i<nl.getLength();i++) {
Node node = nl.item(i);
Land land = new Land();
land.land = Xml.innerHtml(Xml.getChildByTagName(node, "naam"));
land.landcode = Xml.innerHtml(Xml.getChildByTagName(node, "code"));
lijst.add(land);
}
Log.d("Gabug","Klaar met parsen");
Log.d("Gabug","Landen: " + lijst);
} catch (Exception e) {
e.printStackTrace();
}
return lijst;
}
And I use this to make my AlertDialog:
public void KiesLandMenu(){
ArrayList<Land> alleLanden = getLanden();
final CharSequence[] items = alleLanden.toArray(new CharSequence[alleLanden.size()]);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Kies land");
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
switch (item){
case 0:
break;
case 1:
break;
case 2:
break;
}
}
});
AlertDialog alert = builder.create();
alert.show();
}
I don't know if this works as DDMS returns some bytecode or something when i Log it. And after that it Force Closes because of ArrayStoreException..
Now my question is; is this the best way to do this? if yes, how can I fix the ArrayStoreException? If no, what are better ways to let my user choose a country (a whole new view maybe)?
Furthermore, how can I register what country someone tapped?
EDIT:
I slightly changed the sample code below and I get an NullPointerException now..
public void KiesLandMenu(){
ArrayAdapter<Land> arrAdapter;
ArrayList<Land> alleLanden = getLanden();
arrAdapter = new ArrayAdapter<Land>(this, android.R.layout.simple_list_item_single_choice, alleLanden);
ListView list = (ListView)findViewById(R.layout.lijstview);
list.setAdapter(arrAdapter);
list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> list, View view, int position,
long id) {
Log.e("item clicked", String.valueOf(position));
}
});
}
The NullPointerException is at list.setAdapter(arrAdapter);
Make a layout with a ListView, then set that layout in your onCreate. To make the list, you can do something like:
public class RunTestProject extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main); //whatever you want your layout to be
}
// getLanden() implementation goes here
public void KiesLandMenu(){
ArrayList<Land> alleLanden = getLanden();
arrAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice, alleLanden);
Dialog dialog = new Dialog(this);
dialog.setTitle("Kies land");
dialog.setContentView(R.layout.withList); // The dialog layout
ListView list = (ListView) dialog.findViewById(android.R.id.list); //note that it's not simply findViewById
list.setAdapter(arrAdapter);
list.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> list, View view, int position,
long id) {
Log.e("item clicked", String.valueOf(position));
}
});
dialog.show();
}
}
When the user chooses on an item, you can see in the log that the item's position in the array is shown.
Your layout file can be something like:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
/>
</LinearLayout>
You could probably extend AlertDialog and give it a ListView as a view. Then bind the ListView to an ListAdapter which uses your ArrayList.
Edit:
ListView lv = new ListView(context);
ArrayAdapter aa = new ListAdapter(context, viewid, lijst);
lv.setAdapter(aa);
AlertDialog ad = new AlertDialog(context);
ad.setView(lv);
There is a bit more work than that though. You need to specify viewid which is the View representing each item in the ListView.
The sdk reference is very good you know.
new AlertDialog.Builder(this)
.setIcon(R.drawable.alert_dialog_icon)
.setTitle(R.string.alert_dialog_single_choice)
.setSingleChoiceItems(<ListAdapter> or CharaSequnce[] , 0, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked on a radio button do some stuff */
}
})
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked Yes so do some stuff */
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked No so do some stuff */
}
})
.create();
Note :
Please see This link to Api for Bold text mentioned below
.setSingleChoiceItems(CharacterSequnce[] , 0, new DialogInterface.OnClickListener()....
Hope this helps . Thanks :)