如何在Android中使用Material Design在EditText和TextView中应用shapeAppreanace

问题描述

我想设计一个带有圆角的 TextView 和 EditText .

对此有一个简单的解决方案.使用

您可以使用 EditText 实现相同的行为(但在这种情况下，也可以使用 TextInputLayout ):

在您的布局中定义:

 < EditTextandroid:id ="@ + id/edittext"android:paddingLeft ="4dp"android:drawableLeft ="@ drawable/ic_add_24px"android:drawableTint ="@ color/..."android:hint ="@ string/...."..> 

然后应用 MaterialShapeDrawable :

  EditText editText = findViewById(R.id.edittext);//应用圆角ShapeAppearanceModel shapeAppearanceModel = new ShapeAppearanceModel().toBuilder().setAllCorners(CornerFamily.ROUNDED，radius).建造();MaterialShapeDrawable shapeDrawable =新的MaterialShapeDrawable(shapeAppearanceModel);//填充背景色shapeDrawable.setFillColor(ContextCompat.getColorStateList(this，R.color ....));//您也可以应用笔触shapeDrawable.setStroke(2.0f，ContextCompat.getColor(this，R.color ....));//将shapeDrawable应用于背景.ViewCompat.setBackground(editText，shapeDrawable); 

如果您想使用在样式中定义的 ShapeAppareace ，则可以使用不同的 ShapeAppearanceModel 构造函数.例如:

  ShapeAppearanceModel shapeAppearanceModel =ShapeAppearanceModel.builder(this，R.style.ShapeAppearance_MaterialComponents_MediumComponent，R.style.ShapeOverlay).build(); 

具有:

 < style name ="ShapeOverlay">< item name ="cornerSize"> 16dp</item></style> 

I want to design a TextView and EditText with round corner.

There is one straight forward solution for this. Using custom shape background.But since material design 1.1.0 introduces shapeAppearance theme attribute to apply a different shape to the corner which works fine for all Material components like MaterialButton, BottomSheet, MaterialCardView, etc.But it does not work for EditText and TextView. I tried using MaterialTextView as well but it did not work. This how I am setting up style for EditText which is similar to TextView also.

<style name="ThemeOverlay.Chat" parent="AppTheme">
        <item name="editTextStyle">@style/Overlay.Chat.EditText</item>
    </style>


    <style name="Overlay.Chat.EditText" parent="Widget.AppCompat.EditText">
        <item name="shapeAppearanceOverlay">@style/ShapeAppearance.Overlay.FullRound</item>
    </style>

    <style name="ShapeAppearance.Overlay.FullRound" parent="ShapeAppearance.MaterialComponents.LargeComponent">
        <item name="cornerSize">50dp</item>
    </style>

解决方案

You can apply the MaterialShapeDrawable introduced by the Material Components Library also to a TextView or EditText.
In this case you can't use the shapeAppearanceOverlay attribute in your layout or style because these components don't have a MaterialShapeDrawable defined by default as the MaterialButton, MaterialCardView.
But you apply the same ShapeAppearence programmatically.

For example:

<TextView
    android:id="@+id/textview"
    android:backgroundTint="@color/secondaryColor"
    ../>

Programmatically you can use something like:

float radius = getResources().getDimension(R.dimen.default_corner_radius);
TextView textView = findViewById(R.id.textview);

Define the ShapeAppearanceModel with rounded corners:

ShapeAppearanceModel shapeAppearanceModel = new ShapeAppearanceModel()
        .toBuilder()
        .setAllCorners(CornerFamily.ROUNDED,radius)
        .build();

Create a MaterialShapeDrawable with this ShapeAppearanceModel:

MaterialShapeDrawable shapeDrawable = new MaterialShapeDrawable(shapeAppearanceModel);

Apply this background to your view:

ViewCompat.setBackground(textView,shapeDrawable);

You can achieve the same behavior with an EditText (but you can also use a TextInputLayout in this case):

Define in your layout:

    <EditText
        android:id="@+id/edittext"
        android:paddingLeft="4dp"
        android:drawableLeft="@drawable/ic_add_24px"
        android:drawableTint="@color/..."
        android:hint="@string/...."
        ..>

Then apply the MaterialShapeDrawable:

EditText editText = findViewById(R.id.edittext);
//Apply the rounded corners
ShapeAppearanceModel shapeAppearanceModel = new ShapeAppearanceModel()
                .toBuilder()
                .setAllCorners(CornerFamily.ROUNDED,radius)
                .build();

MaterialShapeDrawable shapeDrawable =
            new MaterialShapeDrawable(shapeAppearanceModel);
//Fill the background color
shapeDrawable.setFillColor(ContextCompat.getColorStateList(this,R.color....));
//You can also apply a stroke
shapeDrawable.setStroke(2.0f, ContextCompat.getColor(this,R.color....));

//Apply the shapeDrawable to the background.
ViewCompat.setBackground(editText,shapeDrawable);

If you would like to use ShapeAppareace defined in the styles you can usethe different ShapeAppearanceModel constructors. For example:

ShapeAppearanceModel shapeAppearanceModel =
            ShapeAppearanceModel.builder( this,
                    R.style.ShapeAppearance_MaterialComponents_MediumComponent,
                    R.style.ShapeOverlay).build();

with:

<style name="ShapeOverlay">
    <item name="cornerSize">16dp</item>
</style>

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