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Problem with blurred background on AlertDialog

I'm tried to blur background using this post:
https://stackoverflow.com/a/21278278/10837992.
It's work good but i have a little problem with the size of the dialog.
I'm created custom layout :
I'm changed the realization of the method.
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = this.getLayoutInflater();
View dialogView = inflater.inflate(R.layout.alert_dialog_layout, null);
builder.setView(dialogView);
TextView title = dialogView.findViewById(R.id.Title);
TextView desc = dialogView.findViewById(R.id.Desc);
title.setText("Title");
desc.setText("Desc");
AlertDialog alert = builder.create();
Bitmap map = new BlurUtils().takeScreenShot(getActivity());
Bitmap fast = new BlurUtils().fastblur(map, 50);
final Drawable drawable = new BitmapDrawable(getResources(), fast);
alert.getWindow().setBackgroundDrawable(drawable);
alert.show();
While running this method, the size of the Dialog is cropped:
Screenshoot:

Ok , I find a solution:
Just added Theme to AlertDialog.Builder.
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(),android.R.style.Theme_DeviceDefault_Light_NoActionBar_Fullscreen);

I am creating a alert box in android studio

I am trying to build a alert box in android studio, i have 2 xml and 1 activity class where on click of a button i want to show the other layout.
I am getting a error, here is my code of MainActivity
cancelBookingButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
LayoutInflater inflater = getLayoutInflater();
View alertLayout = inflater.inflate(R.layout.alert_cancel_confirm, null);
final TextView disAgree = (TextView) alertLayout.findViewById(R.id.TextDisagree);
final TextView Agree = (TextView) alertLayout.findViewById(R.id.TextAgree);
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Current Booking");
// This will set the view from XML inside ALertDialog
alert.setView(alertLayout);
// disabling cancel of AlertDialog on click of back button and outside touch
alert.setCancelable(false);
AlertDialog dialog = alert.create();
dialog.show();
}
});
In this line i am getting error
AlertDialog.Builder alert = new AlertDialog.Builder(this);
In Builder cannot be applied
Any idea why i am getting this.

AlertDialog.Builder alert = new AlertDialog.Builder(YourActivity.this);
alert.setTitle("Current Booking");
// This will set the view from XML inside ALertDialog
alert.setView(alertLayout);
// disabling cancel of AlertDialog on click of back button and outside touch
alert.setCancelable(false);
AlertDialog dialog = alert.create();
dialog.show();

how to get text from edittext inside a dialog [duplicate]

This question already has answers here:
Android Alert Dialog unable to find view
(4 answers)
Android can't get EditText getText().toString() in a Dialog
(1 answer)
Closed 8 years ago.
Like the title said how can I get text out of EditText which is found inside a custom dialog?
This is the onCreateDialog method from my dialogfragment:
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
final SharedPreferences.Editor editor = sharedPref.edit();
builder.setView(inflater.inflate(R.layout.name_dialog, null))
.setPositiveButton(R.string.name_ok, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
EditText nameEditText = (EditText) getActivity().findViewById(R.id.name_text_view);
editor.putString(getString(R.string.name_key), nameEditText.getText().toString());
editor.commit();
}
})
.setNegativeButton(R.string.name_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
NameDialogFragment.this.getDialog().cancel();
}
});
return builder.create();
}
I can't get it to work.. I write something in the edittext then i press OK and it just crashes and gives me a null pointer error on this line :
editor.putString(getString(R.string.name_key), nameEditText.getText().toString());

You are looking for the EditText at the wrong View. Its not part of the Activity, its part of the dialog. So check the dialog for the view:
Dialog dialogView = dialog.getDialog();
EditText paymentEt = (EditText) dialogView.findViewById(R.id.edittext_payment);

Instead of using
EditText nameEditText = (EditText) getActivity().findViewById(R.id.name_text_view);
try using this
Dialog dialg = (Dialog) dialog;
EditText et = (EditText) dialg.findViewById(R.id.search_input_text);
val = et.getText().toString();

Update result to TextView of AlertDialog Android

When I tried to set the result of my program to a textView in a dialog box , the app force closed. I made the dialog box by linking an xml which has a textview and it is this textview that I tried to update.
AlertDialog.Builder alert = new AlertDialog.Builder(this);
LayoutInflater factory = LayoutInflater.from(this);
resultOne=(TextView)findViewById(R.id.resultOne); //resultone is a textview in xml dialog
resultOne.setText("hello"); //this code is making the app close
final View textEntryView = factory.inflate(R.layout.dialog, null);
alert.setView(textEntryView);
alert.show();

Change the order so that you acess the View's children after inflating it. You will also need to use textEntryView to find the id, like so:
LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.dialog, null);
resultOne=(TextView)textEntryView.findViewById(R.id.resultOne); //resultone is a textview in xml dialog
resultOne.setText("hello");
alert.setView(textEntryView);
alert.show();

Center message in android dialog box

I want the message text within my dialog box to be center aligned.

Of course, you can always set the gravity of the original text view. This allows you to not have to worry about formatting and padding.
For example
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Title");
builder.setMessage("Message");
builder.setPositiveButton("OK", null);
AlertDialog dialog = builder.show();
// Must call show() prior to fetching text view
TextView messageView = (TextView)dialog.findViewById(android.R.id.message);
messageView.setGravity(Gravity.CENTER);

Create your own TextView object and then supply it to popup builder as View:
AlertDialog.Builder popupBuilder = new AlertDialog.Builder(this);
TextView myMsg = new TextView(this);
myMsg.setText("Central");
myMsg.setGravity(Gravity.CENTER_HORIZONTAL);
popupBuilder.setView(myMsg);
You can control all other text parameters (style, color, size ...). To control margins you may programatically create LinearLayout, set LayoutParams, and then put TextView into it.

Building off of Chase's answer, here's how to also center the title. I think this is the easiest way. Why android doesn't center by default or make it a simple constructor param is beyond me.
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("My Title");
builder.setMessage("My message");
builder.setPositiveButton("OK", listener);
AlertDialog dialog = builder.show();
// Must call show() prior to fetching views
TextView messageView = (TextView)dialog.findViewById(android.R.id.message);
messageView.setGravity(Gravity.CENTER);
TextView titleView = (TextView)dialog.findViewById(context.getResources().getIdentifier("alertTitle", "id", "android"));
if (titleView != null) {
titleView.setGravity(Gravity.CENTER);
}

we can use as like.
public static void showAlert(Activity activity, String message) {
TextView title = new TextView(activity);
title.setText("Your Title Here");
title.setPadding(10, 10, 10, 10);
title.setGravity(Gravity.CENTER);
title.setTextColor(Color.WHITE);
title.setTextSize(20);
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setCustomTitle(title);
builder.setMessage(message);
builder.setCancelable(false);
builder.setNegativeButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.show();
TextView messageText = (TextView)alert.findViewById(android.R.id.message);
messageText.setGravity(Gravity.CENTER);
messageText.setTextColor(Color.RED);
}

you can try this code
public void Info(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Info Aplication");
builder.setIcon(R.drawable.info_adp);
builder.setMessage("Jakarta Hospital");
builder.setCancelable(false);
builder.setPositiveButton("Exit", null);
AlertDialog dialog = builder.show();
TextView messageView = (TextView)dialog.findViewById(android.R.id.message);
messageView.setGravity(Gravity.CENTER);
}

without using textview.
worked for me.
styles.xml
<style name="CustomAlertDialog" parent="Theme.AppCompat.Light.Dialog.Alert">
<item name="android:gravity">center</item>
</style>
Alertdialog
final AlertDialog builder = new AlertDialog.Builder(activity,
R.style.CustomAlertDialog)

try this in your TextView:
android:gravity = "center_vertical|center"