How to use MaterialAlertDialogBuilder fine?

Question

When i use dialog.builder the font size is correct but when i use MaterialAlertDialogBuilder the font size of body text is smaller. its ok?

implementation 'com.google.android.material:material:1.1.0-alpha06'

Im use this theme

<style name="AppTheme" parent="Theme.MaterialComponents.Light">

MaterialComponent code

MaterialAlertDialogBuilder(this)
    .setMessage("This is a test of MaterialAlertDialogBuilder")
    .setPositiveButton("Ok", null)
    .show()

AlertDialog.Builder

AlertDialog.Builder(this)
            .setMessage("This is a test of AlertDialog.Builder")
            .setPositiveButton("Ok", null)
            .show()

Where is the problem?

Answer 1

It is intentional. They are using different styles.

You can change it using something like:

  <style name="Body_ThemeOverlay.MaterialComponents.MaterialAlertDialog" parent="@style/ThemeOverlay.MaterialComponents.MaterialAlertDialog">
    <item name="materialAlertDialogBodyTextStyle">@style/BodyMaterialAlertDialog.MaterialComponents.Body.Text</item>
  </style>
  <style name="BodyMaterialAlertDialog.MaterialComponents.Body.Text" parent="MaterialAlertDialog.MaterialComponents.Body.Text">
    <item name="android:textColor">@color/colorAccent</item>
    <item name="android:textAllCaps">true</item>
    <item name="android:textSize">16sp</item>
    <item name="android:textStyle">bold</item>
  </style>

and then:

 new MaterialAlertDialogBuilder(this,
      R.style.Body_ThemeOverlay_MaterialComponents_MaterialAlertDialog)
            .setTitle("Title")
            .setMessage("Message......")
            ...
            .show();

Answer 2

You can solve like this:

<item name="materialAlertDialogTheme">@style/ThemeOverlay.MyApp.Dialog</item>

<style name="ThemeOverlay.MyApp.Dialog" parent="@style/ThemeOverlay.MaterialComponents.Dialog">
    <item name="android:dialogCornerRadius" tools:targetApi="p">@dimen/dp_4</item>
    <item name="android:paddingBottom">@dimen/dp_2</item>
    ...
</style>

Answer 3

You need to use MaterialAlertDialogBuilder instead of AlertDialog.Builder.

MaterialAlertDialogBuilder(this)
            .setMessage("This is a test of AlertDialog.Builder")
            .setPositiveButton("Ok", null)
            .show()