# Helper

Artifact: [androidx.constraintlayout:constraintlayout-core](https://developer.android.com/jetpack/androidx/releases/constraintlayout) [View Source](https://cs.android.com/search?q=file:androidx/constraintlayout/core/dsl/Helper.java+class:androidx.constraintlayout.core.dsl.Helper) Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

*** ** * ** ***


```
public class Helper
```

<br />

Known direct subclasses [Barrier](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Barrier), [Chain](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Chain), [Guideline](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Guideline)

|---|---|
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Barrier` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Chain` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Guideline` |   |

Known indirect subclasses [HChain](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/HChain), [VChain](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/VChain), [VGuideline](https://developer.android.com/reference/androidx/constraintlayout/core/dsl/VGuideline)

|---|---|
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/HChain` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/VChain` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/VGuideline` |   |

*** ** * ** ***

## Summary

| ### Nested types |
|---|
| `public final class https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.HelperType` |
| `public enum https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.Type` |

| ### Constants |
|---|---|
| `static final https://developer.android.com/reference/java/util/Map.html<https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Constraint.Side, https://developer.android.com/reference/java/lang/String.html>` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#sideMap()` |
| `static final https://developer.android.com/reference/java/util/Map.html<https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.Type, https://developer.android.com/reference/java/lang/String.html>` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#typeMap()` |

| ### Protected fields |
|---|---|
| `https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#config()` |
| `https://developer.android.com/reference/java/util/Map.html<https://developer.android.com/reference/java/lang/String.html, https://developer.android.com/reference/java/lang/String.html>` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#configMap()` |
| `final https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#name()` |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.HelperType` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#type()` |

| ### Public constructors |
|---|
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#Helper(java.lang.String,androidx.constraintlayout.core.dsl.Helper.HelperType)(https://developer.android.com/reference/java/lang/String.html name, https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.HelperType type)` |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#Helper(java.lang.String,androidx.constraintlayout.core.dsl.Helper.HelperType,java.lang.String)(https://developer.android.com/reference/java/lang/String.html name, https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.HelperType type, https://developer.android.com/reference/java/lang/String.html config)` |

| ### Public methods |
|---|---|
| `void` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#append(java.util.Map<java.lang.String,java.lang.String>,java.lang.StringBuilder)(https://developer.android.com/reference/java/util/Map.html<https://developer.android.com/reference/java/lang/String.html, https://developer.android.com/reference/java/lang/String.html> map, https://developer.android.com/reference/java/lang/StringBuilder.html ret)` |
| `https://developer.android.com/reference/java/util/Map.html<https://developer.android.com/reference/java/lang/String.html, https://developer.android.com/reference/java/lang/String.html>` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#convertConfigToMap()()` |
| `https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#getConfig()()` |
| `https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#getId()()` |
| `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper.HelperType` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#getType()()` |
| `static void` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#main(java.lang.String[])(String[] args)` |
| `https://developer.android.com/reference/java/lang/String.html` | `https://developer.android.com/reference/androidx/constraintlayout/core/dsl/Helper#toString()()` |

## Constants

### sideMap

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected static final Map<Constraint.Side, String> sideMap
```

### typeMap

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected static final Map<Helper.Type, String> typeMap
```

## Protected fields

### config

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected String config
```

### configMap

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected Map<String, String> configMap
```

### name

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected final String name
```

### type

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
protected Helper.HelperType type
```

## Public constructors

### Helper

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public Helper(String name, Helper.HelperType type)
```

### Helper

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public Helper(String name, Helper.HelperType type, String config)
```

## Public methods

### append

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public void append(Map<String, String> map, StringBuilder ret)
```

### convertConfigToMap

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public Map<String, String> convertConfigToMap()
```

### getConfig

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public String getConfig()
```

### getId

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public String getId()
```

### getType

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public Helper.HelperType getType()
```

### main

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
public static void main(String[] args)
```

### toString

```
public String toString()
```