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AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Title"); builder.setItems(items, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show(); } }); AlertDialog alert = builder.create();

I am using the above code to display an Alert Dialog. By default, it fills the screen in width and wrap_content in height.
How can I control the width and height of default alert dialog ?
I tried:

alert.getWindow().setLayout(100,100); // It didn't work.

How to get the layout params on the alert window and manually set the width and height?

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11 Answers 11

Reset to default
229

Only a slight change in Sat Code, set the layout after show() method of AlertDialog.

AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setView(layout); builder.setTitle("Title"); alertDialog = builder.create(); alertDialog.show(); alertDialog.getWindow().setLayout(600, 400); //Controlling width and height.

Or you can do it in my way.

alertDialog.show(); WindowManager.LayoutParams lp = new WindowManager.LayoutParams(); lp.copyFrom(alertDialog.getWindow().getAttributes()); lp.width = 150; lp.height = 500; lp.x=-170; lp.y=100; alertDialog.getWindow().setAttributes(lp);
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15 Comments

@ingo: yes you can, Create an xml belong to Dialog box and in that xml design your text like dialog.setContentView(R.layout.dialog); and in xml you can do anything with the text.
@PiyushMishra How to set height and width which support to all Device.
+1 for after show()... Been at this for 2 hours and couldn't get it working until that.
@PratikButani it just a sample, for dynamic height you need to write certain algo like first calculate the height and width of the screen and then according to it you can sub divide the height and width of the dialog and its placement also.
it's important to change the size AFTER the method show is called. It took me too long to realize that.
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31

Ok , I can control the width and height using Builder class. I used 

AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setView(layout); builder.setTitle("Title"); AlertDialog alertDialog = builder.create(); alertDialog.getWindow().setLayout(600, 400); //Controlling width and height. alertDialog.show();
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4 Comments

Excellent catch. After create() is WAY better than after show(), espectially if using DialogFragments!
You are not using the builder class to change the width/height, just the alertDialog object
it didn't work for me between the create and the show, but only after the show.
Should set the window width in an on show listener.
24

For those who will find this thread like me, here is IMO better solution (note the 70% which sets min width of the dialog in percent of screen width):

<style name="my_dialog" parent="Theme.AppCompat.Dialog.Alert"> <item name="windowMinWidthMajor">70%</item> <item name="windowMinWidthMinor">70%</item> </style>

And then apply this style to dialog:

AlertDialog.Builder builder = new AlertDialog.Builder(context, R.style.my_dialog);
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4 Comments

Using of percentage with style is much more easier than making it programmatically
Not working. same width even after this Style.
This can (if at all) only control the minimum width, not the actual or the maximum width.
crazy I know but I had to use BOTH windowMinWidthMinor and android:windowMinWidthMinor variations for this to work across different android versions...
21

Before trying to adjust the size post-layout, first check what style your dialog is using. Make sure that nothing in the style tree sets

<item name="windowMinWidthMajor">...</item> <item name="windowMinWidthMinor">...</item>

If that's happening, it's just as simple as supplying your own style to the [builder constructor that takes in a themeResId](http://developer.android.com/reference/android/app/AlertDialog.Builder.html#AlertDialog.Builder(android.content.Context, int)) available API 11+

<style name="WrapEverythingDialog" parent=[whatever you were previously using]> <item name="windowMinWidthMajor">0dp</item> <item name="windowMinWidthMinor">0dp</item> </style>
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2 Comments

How can I find the theme used by a dialog? I can just guess.
crazy I know but I had to use BOTH windowMinWidthMinor and android:windowMinWidthMinor variations for this to work across different android versions...
15

If you wanna add dynamic width and height based on your device frame, you can do these calculations and assign the height and width.

 AlertDialog.Builder builderSingle = new AlertDialog.Builder(getActivity()); builderSingle.setTitle("Title"); final AlertDialog alertDialog = builderSingle.create(); alertDialog.show(); Rect displayRectangle = new Rect(); Window window = getActivity().getWindow(); window.getDecorView().getWindowVisibleDisplayFrame(displayRectangle); alertDialog.getWindow().setLayout((int)(displayRectangle.width() * 0.8f), (int)(displayRectangle.height() * 0.8f));

P.S : Show the dialog first and then try to modify the window's layout attributes

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2 Comments

What if I dont want to change height?
"P.S : Show the dialog first and then try to modify the window's layout attributes" work like charm!
13

This works as well by adding .getWindow().setLayout(width, height) after show()

alertDialogBuilder .setMessage("Click yes to exit!") .setCancelable(false) .setPositiveButton("Yes",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog,int id) { // if this button is clicked, close // current activity MainActivity.this.finish(); } }) .setNegativeButton("No",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog,int id) { // if this button is clicked, just close // the dialog box and do nothing dialog.cancel(); } }).show().getWindow().setLayout(600,500);
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2 Comments

exactly AFTER show()! I tried before show() and failed
no longer valid, the method show returns void
7

Appreciate answered by Sid because its dynamic but I want to add something.

What if you want to change width only, height will be as it is.

I have done like following:

 // All process of AlertDialog AlertDialog alert = builder.create(); alert.show(); // Creating Dynamic Rect displayRectangle = new Rect(); Window window = getActivity().getWindow(); window.getDecorView().getWindowVisibleDisplayFrame(displayRectangle); alert.getWindow().setLayout((int) (displayRectangle.width() * 0.8f), alert.getWindow().getAttributes().height);

Here I used alert.getWindow().getAttributes().height to keep height as it is of AlertDialog and Width will be changed as per screen resolution.

Hope it will helps. Thanks.

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4

I dont know whether you can change the default height/width of AlertDialog but if you wanted to do this, I think you can do it by creating your own custom dialog. You just have to give android:theme="@android:style/Theme.Dialog" in the android manifest.xml for your activity and can write the whole layout as per your requirement. you can set the height and width of your custom dialog from the Android Resource XML.

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3 Comments

It might work , but I did not want to add another activity. I posted the solution which I used. Thank you.
Yep , the above method too works for showing items in popup style or say alert dialog style. Just tried it out in one of the projects.
Just compared 2 ways , 1. With AlertDialog.builder and another 2. actvity with theme Dialog, second one is better solution , only drawback being if one has to send some results back to the background view , have to use startActivityForResult , since elements(views) in background activity are not available.
4

I think tir38's answer is the cleanest solution. Have in mind that if you are using android.app.AlerDialog and holo themes your style should look like this 

<style name="WrapEverythingDialog" parent=[holo theme ex. android:Theme.Holo.Dialog]> <item name="windowMinWidthMajor">0dp</item> <item name="windowMinWidthMinor">0dp</item> </style>

And if using support.v7.app.AlertDialog or androidx.appcompat.app.AlertDialog with AppCompat theme your style should look like this 

<style name="WrapEverythingDialog" parent=[Appcompat theme ex. Theme.AppCompat.Light.Dialog.Alert]> <item name="android:windowMinWidthMajor">0dp</item> <item name="android:windowMinWidthMinor">0dp</item> </style>
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1 Comment

you just copied tir38's answer
3 
longButton.setOnClickListener { show( "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n" + "1234567890-12345678901234567890123456789012345678901234567890" ) } shortButton.setOnClickListener { show( "1234567890\n" + "1234567890-12345678901234567890123456789012345678901234567890" ) } 
private fun show(msg: String) { val builder = AlertDialog.Builder(this).apply { setPositiveButton(android.R.string.ok, null) setNegativeButton(android.R.string.cancel, null) } val dialog = builder.create().apply { setMessage(msg) } dialog.show() dialog.window?.decorView?.addOnLayoutChangeListener { v, _, _, _, _, _, _, _, _ -> val displayRectangle = Rect() val window = dialog.window v.getWindowVisibleDisplayFrame(displayRectangle) val maxHeight = displayRectangle.height() * 0.6f // 60% if (v.height > maxHeight) { window?.setLayout(window.attributes.width, maxHeight.toInt()) } } }

short message

long message

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0

It took me a long time to get this working how I wanted it to. This code made it so that almost the whole screen width is filled with the dialog which is what I wanted...

public class GenericDialogFragment extends DialogFragment { ... public void show() { super.show(fragmentManager, null); // Wait for the dialog to be created before resizing // Source: https://stackoverflow.com/questions/8456143/dialogfragment-getdialog-returns-null fragmentManager.executePendingTransactions(); // Creating dynamic size // Source: https://stackoverflow.com/questions/4406804/how-to-control-the-width-and-height-of-the-default-alert-dialog-in-android Rect displayRectangle = new Rect(); Window window = mActivity.getWindow(); window.getDecorView().getWindowVisibleDisplayFrame(displayRectangle); if (getDialog() != null) { getDialog().getWindow().setLayout( (int) (displayRectangle.width() * 1.0f), getDialog().getWindow().getAttributes().height); } } }
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