# MarkerEdgeTreatment

[View Source](https://github.com/material-components/material-components-android/blob/1.14.0/lib/java/com/google/android/material/shape/MarkerEdgeTreatment.java)

*** ** * ** ***


```
public final class MarkerEdgeTreatment extends EdgeTreatment
```

<br />

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [com.google.android.material.shape.EdgeTreatment](https://developer.android.com/reference/com/google/android/material/shape/EdgeTreatment) ||
|   | ↳ | [com.google.android.material.shape.MarkerEdgeTreatment](https://developer.android.com/reference/com/google/android/material/shape/MarkerEdgeTreatment) |

*** ** * ** ***

Draws an arrow on the edge given the radius of a circle. The arrow is drawn as two perpendicular lines tangent to the circle. This allows the arrow to be drawn smoothly on a pill or circular shape.

If you just want a triangle of a specific size use `https://developer.android.com/reference/com/google/android/material/shape/TriangleEdgeTreatment` instead.

## Summary

| ### Public constructors |
|---|
| `https://developer.android.com/reference/com/google/android/material/shape/MarkerEdgeTreatment#MarkerEdgeTreatment(float)(float radius)` |

| ### Public methods |
|---|---|
| `void` | `https://developer.android.com/reference/com/google/android/material/shape/MarkerEdgeTreatment#getEdgePath(float,float,float,com.google.android.material.shape.ShapePath)( float length, float center, float interpolation, https://developer.android.com/reference/com/google/android/material/shape/ShapePath shapePath )` Generates a `https://developer.android.com/reference/com/google/android/material/shape/ShapePath` for this edge treatment. |

| ### Inherited methods |
|---|
| From [com.google.android.material.shape.EdgeTreatment](https://developer.android.com/reference/com/google/android/material/shape/EdgeTreatment) |---|---| | `void` | `[getEdgePath](https://developer.android.com/reference/com/google/android/material/shape/EdgeTreatment#getEdgePath(float,float,com.google.android.material.shape.ShapePath))(float length, float interpolation, https://developer.android.com/reference/com/google/android/material/shape/ShapePath shapePath)` **This method is deprecated.** Does not support interpolation. <br /> | |

## Public constructors

### MarkerEdgeTreatment

```
public MarkerEdgeTreatment(float radius)
```

## Public methods

### getEdgePath

```
public void getEdgePath(
    float length,
    float center,
    float interpolation,
    ShapePath shapePath
)
```

Generates a `https://developer.android.com/reference/com/google/android/material/shape/ShapePath` for this edge treatment.

EdgeTreatments have an origin of (0, 0) and a destination of (0, length) (i.e. they represent the top edge), and are automatically rotated and scaled as necessary when applied to other edges. Only the horizontal, top EdgeTreatment needs to be defined in order to apply it to all four edges.

| Parameters |
|---|---|
| `float length` | the length of the edge. |
| `float center` | the distance to the center of the edge. This takes into account any offset added by the proceeding corner. Drawing anything at (center, 0) will be center aligned with the shape. Normally you'll want to use this instead of length / 2. |
| `float interpolation` | the interpolation of the edge treatment. Ranges between 0 (none) and 1 (fully) interpolated. Custom edge treatments can implement interpolation to support shape transition between two arbitrary states. Typically, a value of 0 indicates that the custom edge treatment is not rendered (i.e. that it is a straight line), and a value of 1 indicates that the treatment is fully rendered. Animation between these two values can "heal" or "reveal" an edge treatment. |
| `https://developer.android.com/reference/com/google/android/material/shape/ShapePath shapePath` | the `https://developer.android.com/reference/com/google/android/material/shape/ShapePath` that this treatment should write to. |