Change title size of alertdialog in android?

Question

about text in the message there is not problem. I can't change (personalize) color, font, style of Title of alertdialog?

What's the way?

thanks!

Solution 1

About font size you can use this:

SpannableStringBuilder ssBuilser = new SpannableStringBuilder("Sample");
StyleSpan span = new StyleSpan(Typeface.ITALIC);
ScaleXSpan span1 = new ScaleXSpan(1);
ssBuilser.setSpan(span, 0, 5, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
ssBuilser.setSpan(span1, 0, 5, Spanned.SPAN_INCLUSIVE_INCLUSIVE);

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
   builder.setTitle(ssBuilser);
   builder.show();

or

AlertDialog dialog = new AlertDialog.Builder(this).setMessage("Hello world").show();
TextView textView = (TextView) dialog.findViewById(android.R.id.message);
textView.setTextSize(40);

Solution 2

Check out this link: Creating dialogs

This should help.

Or this Alert Dialog Builder

Solution 3

Here is an full example how i would do it. See the last line of code.

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(cntx);
alertDialogBuilder
.setMessage(Html.fromHtml(cntx.getString(R.string.UltimateDemoText)))
.setCancelable(false)
.setPositiveButton(cntx.getString(R.string.Ok), new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog,int id) { 
    dialog.cancel(); 
    }
 });
AlertDialog alertDialog = alertDialogBuilder.create();    
alertDialog.show();

((TextView)alertDialog.findViewById(android.R.id.title)).setTextSize(TypedValue.COMPLEX_UNIT_SP, 9);

Solution 4

There is another way to set a new custom view to a dialog title. We can define every custom view such as TextView and add it some custom properties and set it to the dialog title:

 AlertDialog.Builder builder = new AlertDialog.Builder(OrderItemsActivity.this);

TextView title_of_dialog = new TextView(getApplicationContext());
title_of_dialog.setHeight(50);
title_of_dialog.setBackgroundColor(Color.RED);
title_of_dialog.setText("Custom title");
title_of_dialog.setTextSize(TypedValue.COMPLEX_UNIT_SP, 15);
title_of_dialog.setTextColor(Color.WHITE);
title_of_dialog.setGravity(Gravity.CENTER);

builder.setCustomTitle(title_of_dialog);
builder.create().show();

Here, I define a dynamic TextView and set some properties to it. Finally, I set it to dialog title using setCustomTitle().

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Comments

[vishal]

Hi. Getting Null Pointer Exception java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setTextSize(int, float)' on a null object reference

[Primoz990]

@vishal I have not tested this code for all api leves. If you found a solution please let me know, so i can add it to my answer.