Develop Reference

Change values of predefined Items in Multichoice AlertDialog

I have been trying to implement a multichoice alertdialog and for the most part everything is clear and understandable but the alertdialog gets the state of the items from a boolean array and all the items are set as true. I can't quite work out how I could change the state of an item in the array if it is checked in the alertdialog.
private void showCategorySelectionDialog() {
// Prepare the dialog by setting up a Builder.
final String selectionTitle = "Show on map: ";
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(selectionTitle);
final String[] categories = new String[]{"Camping grounds","Abandoned places","Nature areas","Lookout Points"};
// Find the current map type to pre-check the item representing the current state.
boolean[] checkedItems = new boolean[]{
true,
true,
true,
true
};
// Add an OnClickListener to the dialog, so that the selection will be handled.
builder.setMultiChoiceItems(
categories,
checkedItems,
new DialogInterface.OnMultiChoiceClickListener() {
#Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
//check which item is clicked and if it was true then set it as false.
if (isChecked && checkedItems[which] == true){
checkedItems[which]= false;
}else{
//If item was clicked and the value was false then set it as true.
checkedItems[which] = true;
}
}
}
);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
// Build the dialog and show it.
AlertDialog categoryDialog = builder.create();
categoryDialog.setCanceledOnTouchOutside(true);
categoryDialog.show();
}
This current solution does not change values and my assumptions are that I am handling the Array in an incorrect way but I am not sure how the right way would be.

Since you want to change the value for an element in the array when it was checked then you can try to set the value to be equal with the isChecked variable that is passed through onClick() method.
Check the code below:
// Add an OnClickListener to the dialog, so that the selection will be handled.
builder.setMultiChoiceItems(
categories,
checkedItems,
new DialogInterface.OnMultiChoiceClickListener() {
#Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
checkedItems[which] = isChecked;
}
}
);

java android getResources().getIdentifier() of elment at alertdialog with LayoutInflater

I try to get dynamically an identifier of some checkbox in a AlertDialog.
But I do not find the right code for this.
Every time I get return 0.
I have a test to get id of alert title ("android:id/alertTitle")
And this works fine. But I'am not able to reach my inflater-ID's
For me it seems like the context is wrong?
AlertDialog.Builder builder = new AlertDialog.Builder(Claim.this);
builder.setView(optionmenu);
final CheckBox[] myCheckBox = new CheckBox[checkedItems.length];
builder.setTitle("Select pages for claim");
builder.setNegativeButton("Close", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
for(int i=0; i<checkedItems.length; i++) {
String checkboxID = "android:id/optionspage"+i+"CheckBox";
int resID = builder.getContext().getResources().getIdentifier(checkboxID, null, null);
myCheckBox[i] = ((CheckBox) findViewById(resID));
myCheckBox[i].setChecked(checkedItems[i]);
}
What am I doing wrong here? Thanks.

Change font style using shared preferences

Code
Button mButton1;
String mDefaultFont1;
SharedPreferences mSharedPreferences1;
SharedPreferences.Editor editor1;
mButton1 = (Button)findViewById(R.id.buttontextfontsent);
mSharedPreferences1 = PreferenceManager.getDefaultSharedPreferences(this);
mDefaultFont1 = mSharedPreferences1.getString("Default_Font1","Normal");
mButton1.setTypeface(mButton1.getTypeface(),Typeface.NORMAL);
mButton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String[] list = new String[]{"Normal", "Bold", "Italic", "Bold ITalic"};
AlertDialog.Builder builder = new AlertDialog.Builder(CustomizeFont.this);
builder.setTitle("Make your selection");
builder.setItems(list, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
if (item==0) mButton1.setTypeface(mButton1.getTypeface(),Typeface.NORMAL);
if (item==1) mButton1.setTypeface(mButton1.getTypeface(),Typeface.BOLD);
if (item==2) mButton1.setTypeface(mButton1.getTypeface(),Typeface.ITALIC);
if (item==3) mButton1.setTypeface(mButton1.getTypeface(),Typeface.BOLD_ITALIC);
editor1 = PreferenceManager.getDefaultSharedPreferences(CustomizeFont.this).edit();
editor1.putString("Default_Font1", String.valueOf(item));
editor1.apply();
}
});
builder.show();
}
});
I can change the font but when i restart the activity it goes back to the original normal font... the problem is because of this line mButton1.setTypeface(mButton1.getTypeface(),Typeface.NORMAL);
I need to set the TypeFace.NORMAL to Default_Font1 But not accepting... what should I do?

I need to set the textview to Default_Font1 But not accepting... what should I do?
You need to setTypeface in your button based on you values getting from SharedPreferences
SAMPLE CODE
mDefaultFont1 = mSharedPreferences1.getString("Default_Font1","0");
if (mDefaultFont1.equals("0")) {
mButton1.setTypeface(mButton1.getTypeface(), Typeface.NORMAL);
} else if (mDefaultFont1.equals("1")) {
mButton1.setTypeface(mButton1.getTypeface(), Typeface.BOLD);
} else if (mDefaultFont1.equals("2")) {
mButton1.setTypeface(mButton1.getTypeface(), Typeface.ITALIC);
} else if (mDefaultFont1.equals("3")) {
mButton1.setTypeface(mButton1.getTypeface(), Typeface.BOLD_ITALIC);
}
mButton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String[] list = new String[]{"Normal", "Bold", "Italic", "Bold ITalic"};
AlertDialog.Builder builder = new AlertDialog.Builder(CustomizeFont.this);
builder.setTitle("Make your selection");
builder.setItems(list, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
if (item==0) mButton1.setTypeface(null);
if (item==1) mButton1.setTypeface(mButton1.getTypeface(),Typeface.BOLD);
if (item==2) mButton1.setTypeface(mButton1.getTypeface(),Typeface.ITALIC);
if (item==3) mButton1.setTypeface(mButton1.getTypeface(),Typeface.BOLD_ITALIC);
editor1 = PreferenceManager.getDefaultSharedPreferences(CustomizeFont.this).edit();
editor1.putString("Default_Font1", String.valueOf(item));
editor1.apply();
}
});
builder.show();
}
});

try this .
editor.putInt("fontCode",mButton1.getTypeFace().getStyle());
and then use it as normal shared prefrence

mDefaultFont1 = mSharedPreferences1.getString("Default_Font1","Normal");
mButton1.setTypeface(mButton1.getTypeface(),Typeface.NORMAL);
This logic is completely wrong, keep in mind that you're saving int values in preferences (0, 1, 2, 3), but first you load it as if it was string with default value "normal".
In the second line you're setting the typeface for the button, but taking current typeface from same button, so what you get? No change.
Instead of that, I suggest something like this:
mDefaultFont1 = mSharedPreferences1.getInt("Default_Font1",0);
mButton1.setTypeface(mDefaultFont1);
And save the preference like this:
public void onClick(DialogInterface dialog, int item) {
int defaultTypeface = 0;
if (item==0) defaultTypeface = Typeface.NORMAL;
if (item==1) defaultTypeface = Typeface.BOLD;
if (item==2) defaultTypeface = Typeface.ITALIC;
if (item==3) defaultTypeface = Typeface.BOLD_ITALIC;
mButton1.setTypeface(defaultTypeface);
editor1 = PreferenceManager.getDefaultSharedPreferences(CustomizeFont.this).edit();
editor1.putInt("Default_Font1", defaultTypeface);
editor1.apply();
}
Note, my code might be bit wrong, since I did write it from memory and didn't check if it's really fine.

Android Linkify text in dialog

Hi I've gone through all of the different linkify tutorials I could find but none of them work here is my current code:
final SpannableString s = new SpannableString("Please send any questions to email#fake.com");
Linkify.addLinks(s, Linkify.EMAIL_ADDRESSES);
AlertDialog.Builder builder = new AlertDialog.Builder(Activity.this);
builder.setTitle("Warning!")
.setMessage(s)
.setCancelable(false)
.setPositiveButton("Accept", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("Decline", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Activity.this.finish();
}
}).show();
However when I actually run the app it shows the text like blue and underlined as if it were linked but selecting the text doesn't prompt to open the email app. I've also tried with urls and the browser doesn't work is there something that's missing?
Thanks for any help.

In order to have a clickable area on dialog you need to use TextView (View) and set autoLink=all in layout file or invoke setAutoLinkMask() method from within the code.
final SpannableString s = new SpannableString("Please send any questions to email#fake.com");
//added a TextView
final TextView tx1=new TextView(this);
tx1.setText(s);
tx1.setAutoLinkMask(RESULT_OK);
tx1.setMovementMethod(LinkMovementMethod.getInstance());
Linkify.addLinks(s, Linkify.EMAIL_ADDRESSES);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Warning!")
.setCancelable(false)
.setPositiveButton("Accept", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("Decline", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
})
.setView(tx1)
.show();

Here's Kotlin in case it's helpful:
val s = SpannableString(getString(R.string.actions_list_info_button_body))
val tx1 = TextView(context!!)
tx1.text = s
tx1.autoLinkMask = RESULT_OK
tx1.movementMethod = LinkMovementMethod.getInstance()
The rest is the same.
The result likely will not look great so you probably will want to add some padding as well:
// Adjust Padding to dp
val scale: Float = resources.displayMetrics.density
val dpAsPixels: Int = (25 * scale + 0.5f).toInt()
text.setPadding(dpAsPixels,20,dpAsPixels,0)

Alternatively, you can reuse the TextView created.
AlertDialog.Builder builder;
builder.setMessage(R.string.yourMessage);
Dialog dialog = builder.create();
dialog.setOnShowListener(d -> {
TextView text = dialog.getWindow().findViewById(android.R.id.message);
text.setAutoLinkMask(Linkify.ALL);
text.setMovementMethod(LinkMovementMethod.getInstance());
});

Parse XML and display it in an AlertDialog in Android

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 :)