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How to Create Custom Dilaog on Button Click

I am working on an application for my personal project.
I plan to have a table/chart in my application, and next to the application I plan to put a button which is what I need help with.
Could you please tell me what code I can use to create a button which when clicked:
Creates a new window(popup or not is fine) where there is a editText
for the users to input some text and when they are done the text is
inserted into a cell of the table?
Maybe useless information:
My application's "table" should be borderless and maybe instead of table is list with separators between the user's text
The application is essentially a to do list but when they click the button to insert a new task it is in a new window.

Create an AlertDialogBox
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext(), );
builder.setMessage("Message")
.setIcon(R.drawable.icon)
.setTitle("Title");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//Todo
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//Todo
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();

When you put a button in the XML code you need to fetch it by it's id in the activity (java class), then use
button.onClickListener( v -> {
//here you can have a code block that will be done once the button is clicked
//put Ashutosh Sagar code for the alert dialog
Keep in mind that you can make the dialog as you want by customizing it to your preferences. This usually requires another XML layout just for the look of the dialog and some more reading on Alert Dialog.
As it was said above by Aman, we can clearly post you the code but that way you won't learn anything. Happy coding.

java Android - two dialogs, prevent first dialog from closing after second one exits

Initially in my app I am creating an AlertDialog which has three buttons, in which the middle button opens up another AlertDialog. The problem is that when the second AlertDialog closes after a button is pressed, the first one closes with it. I think both AlertDialogs get closed after I press a button on the second AlertDialog.
What I want is for the first AlertDialog to open another AlertDialog that has its own buttons, and when second AlertDialog presses a button, it only closes itself and goes back to the first one. Is there any way to achieve this?
Here is the code for the button used to open the AlertDialog:
final ImageButton fabgroup = (ImageButton) findViewById(R.id.groupButton);
Here's the code for a button that opens an AlertDialog that contains another button that opens another AlertDialog using the middle button (create button) on itself, but closes them both when a button on the second one is pressed (either the yes or no button, which is not what I want as I only want the second one to close itself and go back to the first AlertDialog, and yea this sounds pretty confusing in theory so I can try to clarify if needed):
fabgroup.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
final AlertDialog.Builder helpBuilder = new AlertDialog.Builder(CreateNote.this);
helpBuilder.setTitle("Select a group");
helpBuilder.setMessage("Add to group?");
final TextView input = new TextView(mainactiv.this);
input.setSingleLine();
input.setText("");
helpBuilder.setView(input);
helpBuilder.setNegativeButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do nothing but close the dialog
Toast.makeText(CreateNote.this, "Page has been added to group", Toast.LENGTH_SHORT).show();
}
});
helpBuilder.setNeutralButton("Create", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//open another alertbox
AlertDialog.Builder helpBuilder2 = new AlertDialog.Builder(CreateNote.this);
helpBuilder2.setTitle("Assign a new group");
helpBuilder2.setMessage("Create group?");
final EditText input = new EditText(CreateNote.this);
input.setSingleLine();
input.setText("");
helpBuilder2.setView(input);
helpBuilder2.setNegativeButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Create Group
Toast.makeText(CreateNote.this, "Group has been created", Toast.LENGTH_SHORT).show();
}
});
helpBuilder2.setPositiveButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// Do nothing
}
});
// Remember, create doesn't show the dialog
AlertDialog helpDialog2 = helpBuilder2.create();
helpDialog2.show();
}
});
helpBuilder.setPositiveButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// Do nothing
}
});
// Remember, create doesn't show the dialog
AlertDialog helpDialog = helpBuilder.create();
helpDialog.show();
}
});
Help would be greatly appreciated.

I eventually managed to solve this problem by creating two separate functions to generate each dialog box, and when one closes it calls the function to create the other one, kinda like recycling (or maybe closer to looping functions). Although, I'm not entirely sure how performance heavy this is, but it seems to do the job without any issues from what I'm testing. If anyone would like to chime in on how this could be an issue, then I'm open to hearing what others have to say about the negative points of using alert dialog boxes this way.

You can show an activity as dialog. Put this in your manifest file.
<activity android:theme="#android:style/Theme.Dialog" android:excludeFromRecents="true"/>
From this answer: Android Activity as a dialog

Android Math quiz (Thread manipulation)

I need to make a math quiz. Here is workflow:
On button click(Start) i need to show a question e.g. 5+5, which stays on screen for 2 seconds after which a dialog i shown asking for result of previous operation. And i need to repeat that for e.g. 5 times. At the end I need to show to user number of correct answers.
I have Java experience but I'm new to Android. I have read various articles and examples regarding Android threading but haven't found solution to this workflow.
As far as I know I cannot block or pause main/UI thread, but the problem is that i should repeat questions for e.g. 5 times and after each one(after 2 sec.) I should pause activity to show Dialog and then go back to showing another question.
Thanks in advance!
EDIT:
Here is my code for now. The number is shown on screen and after 2 seconds alert dialog is shown asking to enter that number. But the problem is that the application doesn't wait for user input but continues to show new random number an opens new alert dialog every 2 seconds.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_questions);
tv = (TextView) findViewById(R.id.questionText);
handler = new Handler();
Runnable r = new Runnable() {
public void run() {
tv.setText(String.valueOf(rand.nextInt(50) + 1));
createDialog();
handler.postDelayed(this, 2000);
}
};
handler.postDelayed(r, 2000);
}
protected void createDialog() {
LayoutInflater li = LayoutInflater.from(context);
View promptsView = li.inflate(R.layout.activity_answer_dialog, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set prompts.xml to alertdialog builder
alertDialogBuilder.setView(promptsView);
final EditText userInput = (EditText) promptsView.findViewById(R.id.editTextDialogUserInput);
// set dialog message
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// get user input and set it to result
// edit text
result.setText(userInput.getText());
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
PS. Also I tried to create separate Activity for dialog and added this line to Manifest:
android:theme="#android:style/Theme.Dialog"
but the same thing happens.

You use event driven programming and timers. To show the dialog after 2 seconds, the easiest way is to post a runnable to a handler using postDelayed, which will call your runnable in N milliseconds. Then display the dialog box.
You don't need to pause the activity to show the dialog box, just show it. Any code that you want to run after the dialog is finished with should be put in the handler for the dialog's ok button. In other words, your code is called in response to the event of a button being pressed.

How to set font size for text of dialog buttons

I have an android app that uses some custom dialogs which are inflated from XML layouts. The contents of the dialog's view come from the XML layout, but the actual positive and negative buttons are added by calling the builder's setPositiveButton and setNegativeButton methods, so I have no control over (or at least don't know how to control) the styling of the buttons themselves.
See the onCreateDialog method below from my LoginConfirmationDialog.java file which extends DialogFragment. It basically pops a very simple dialog up that asks for confirmation of who is logging in (i.e. "Are you Joe Schmoe?", with Yes and No buttons).
The XML layout in this case has just a single TextView, and to make this easy (because the users will be construction workers with big knobby dirty fingers who need large text and large buttons), I made the font for the TextView pretty big. The two buttons though have much smaller font for their text, and since they aren't part of my layout and are added with the setPositiveButton and setNegativeButton methods, how do I control the font size?
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Bundle args = this.getArguments();
String empName = args.getString("empName");
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_login_confirmation, null);
TextView message = (TextView)view.findViewById(R.id.txtLoginConfirmationMessage);
message.setText("Are you " + empName + "?");
builder.setView(view);
builder.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
mListener.onEmpConfirmPositiveClick(LoginConfirmationDialog.this);
}
});
builder.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
mListener.onEmpConfirmNegativeClick(LoginConfirmationDialog.this);
}
});
// Create the AlertDialog object and return it
return builder.create();
}

Instead of returning builder.create(), try this.-
final AlertDialog alert = builder.create();
alert.setOnShowListener(new DialogInterface.OnShowListener() {
#Override
public void onShow(DialogInterface dialog) {
Button btnPositive = alert.getButton(Dialog.BUTTON_POSITIVE);
btnPositive.setTextSize(TEXT_SIZE);
Button btnNegative = alert.getButton(Dialog.BUTTON_NEGATIVE);
btnNegative.setTextSize(TEXT_SIZE);
}
});
return alert;

Took me a while, to integrate Asok's answer, since I used anonymous inner classes for buttons, so I needed to get a handle on the button references. This works. Make sure it goes after the messageDialog.show() line:
messageDialog.show();
messageDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextSize(TypedValue.COMPLEX_UNIT_SP, 25.0f);
messageDialog.getButton(AlertDialog.BUTTON_NEUTRAL).setTextSize(TypedValue.COMPLEX_UNIT_SP, 25.0f);
Note: It's recommended to use sp as a unit for text size. Unlike px, it is device density independent.

You can try this:
AlertDialog.Builder builder = new AlertDialog.Builder(CompQuestionsActivity.this);
builder.setMessage("Message");
builder.setPositiveButton("Yes", dialogClickListener);
builder.setNegativeButton("No", dialogClickListener);
AlertDialog alertDialog = builder.create();
alertDialog.show();
//For positive button:
Button button1 = alertDialog.findViewById(android.R.id.button1);
button1.setTextSize(25);
//For negative button:
Button button2 = alertDialog.findViewById(android.R.id.button2);
button2.setTextSize(25);

Since you are already using an xml file for the dialog why not just include the two buttons in the layout and set the onClick handlers in the dialog creation, something like this should work. I am using something similar.
Here is a quick example:
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_login_confirmation, null);
TextView message = (TextView)view.findViewById(R.id.txtLoginConfirmationMessage);
message.setText("Are you " + empName + "?");
Button positiveBtn = (Button) view.findViewById(R.id.dialogButtonPositive);
// Set size of button in relation to screen size
positiveBtn.setTextSize(TypedValue.COMPLEX_UNIT_PX, (float) 25);
positiveBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mListener.onEmpConfirmPositiveClick(LoginConfirmationDialog.this);
}
});
Button negativeBtn = (Button) view.findViewById(R.id.dialogButtonNeg);
// Set size of button in relation to screen size
negativeBtn.setTextSize(TypedValue.COMPLEX_UNIT_PX, (float) 25);
negativeBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mListener.onEmpConfirmNegativeClick(LoginConfirmationDialog.this);
}
});
builder.setView(view);
return builder.create();
I am also quite fond of using the following for setting text sizes, this allows for various screen sizes to get a different size of text (You can play with the float value to suit your needs):
.setTextSize(TypedValue.COMPLEX_UNIT_PX, (float) 25);

You should check out the following answer:
In Dialog.java (Android src) a ContextThemeWrapper is used. So you could copy the idea and do something
You just have to change the following line of code:
<item name="android:textSize">10sp</item> to your desired size.
And don't forget to check the comments of the answer also.
Best of luck.

I have tried many devices using setOnShowListener . But it did not work for all devices. In the end I come to a decision that the most easiest way is to using a Theme for your alertDialog.
Add this to the style file.
<style name="MyAlertDialogTheme" parent="Theme.AppCompat.Light.Dialog.Alert">
<item name="android:textSize">10sp</item>
</style>
Now Use this in your AlertDialog
val dialog = AlertDialog.Builder(requireActivity(),R.style.MyAlertDialogTheme)
Thats all.

My approach is to obtain the buttons in onResume() and configure them there
public class LoginConfirmationDialog extends DialogFragment {
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// your code here remains unchanged
}
#Override
public void onResume() {
super.onResume();
Button positiveButton = ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_POSITIVE);
positiveButton.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
Button negativeButton = ((AlertDialog) getDialog()).getButton(AlertDialog.BUTTON_NEGATIVE);
negativeButton.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
}
}

Android - AlertDialog.Builder crashes when launching it a second time

I am opening an AlertDialog to present the user a text input in order to name a new item. This works fine the first time it opens. But the second time I click the button that launches the dialog, the app crashes. I get this error:
12-02 16:01:04.205: E/AndroidRuntime(515): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
I'm not sure what this means or where I would call this removeView().
Here is my code:
public class ShoppingList extends Activity implements OnClickListener{
private AlertDialog.Builder m_alert;
private Context m_context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.shopping_list);
m_context = getApplicationContext();
LayoutInflater inflater = (LayoutInflater) m_context.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.add_shopping_list, (ViewGroup) findViewById(R.id.layout_root));
m_alert = new AlertDialog.Builder(ShoppingList.this);
//final EditText input = new EditText(this);
//m_alert.setView(input);
m_alert.setView(layout);
final EditText input = (EditText)layout.findViewById(R.id.new_sl_name);
m_alert.setPositiveButton(R.string.add_button, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String value = input.getText().toString().trim();
Toast.makeText(m_context, value,
Toast.LENGTH_SHORT).show();
m_alert.create();
}
});
m_alert.setNegativeButton(R.string.cancel_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
m_alert.create();
}
}
);
// Add Button. . .
Button addButton = (Button)findViewById(R.id.add_sl_button);
addButton.setOnClickListener(this);
}
public void onClick(View v) {
if(!this.isFinishing())
m_alert.show();
}
}

This is most likely because you are using m_alert.create(); in a wrong place.
Check this tutorial on dialogs: Dialogs.

m_alert.create() is called after clicking on the positive and negative buttons. What this does, is create the dialog again.
Use m_alert.dismiss() instead, so your dialog is dismissed, and you can use it again later

This might help someone. I build most of my apps on my laptop. I just got my office put back together and got my pc fired up. When I tried to load my projects from my cloud storage on my pc it seemed like there were a few build errors that happened. For AlertDialog.Builder Crash I notice that my pc on a fresh Android Studio install set my "import" to android.support.v7.app.AlertDialog instead of android.app.AlertDialog for some reason. I deleted the import and re selected the android.app.AlertDialog and everything worked like normal. I don't know if this is a bug or just how Android Studio installs files as a default. For similar errors might be worth while deleting all the import files and re selecting the ones you know apply. Good Luck!