Summary: Methods | Inherited Methods | [Expand All]

# DataInteraction

`public class DataInteraction`
`extends Object` ``

java.lang.Object
↳ | android.support.test.espresso.DataInteraction

An interface to interact with data displayed in AdapterViews.

This interface builds on top of `ViewInteraction` and should be the preferred way to interact with elements displayed inside AdapterViews.

This is necessary because an AdapterView may not load all the data held by its Adapter into the view hierarchy until a user interaction makes it necessary. Also it is more fluent / less brittle to match upon the data object being rendered into the display then the rendering itself.

By default, a DataInteraction takes place against any AdapterView found within the current screen, if you have multiple AdapterView objects displayed, you will need to narrow the selection by using the inAdapterView method.

The check and perform method operate on the top level child of the adapter view, if you need to operate on a subview (eg: a Button within the list) use the onChildView method before calling perform or check.

## Summary

### Public methods
`DataInteraction` | `atPosition(Integer atPosition)` Selects the view which matches the nth position on the adapter based on the data matcher.
`ViewInteraction` | `check(ViewAssertion assertion)` Performs an assertion on the state of the view after we force the data to be loaded.
`DataInteraction` | `inAdapterView(Matcher<View> adapterMatcher)` Selects a particular adapter view to operate on, by default we operate on any adapter view on the screen.
`DataInteraction` | `inRoot(Matcher<Root> rootMatcher)` Causes this data interaction to work within the Root specified by the given root matcher.
`DataInteraction` | `onChildView(Matcher<View> childMatcher)` Causes perform and check methods to take place on a specific child view of the view returned by Adapter.getView()
`ViewInteraction` | `perform(ViewAction... actions)` Performs an action on the view after we force the data to be loaded.
`DataInteraction` | `usingAdapterViewProtocol(AdapterViewProtocol adapterViewProtocol)` Use a different AdapterViewProtocol if the Adapter implementation does not satisfy the AdapterView contract like (@code ExpandableListView)

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()`
`boolean` | `equals(Object arg0)`
`void` | `finalize()`
`final Class<?>` | `getClass()`
`int` | `hashCode()`
`final void` | `notify()`
`final void` | `notifyAll()`
`String` | `toString()`
`final void` | `wait(long arg0, int arg1)`
`final void` | `wait(long arg0)`
`final void` | `wait()`

## Public methods

### atPosition

    DataInteraction atPosition (Integer atPosition)

Selects the view which matches the nth position on the adapter based on the data matcher.

Parameters
`atPosition` | `Integer`

Returns
`DataInteraction` |

### check

    ViewInteraction check (ViewAssertion assertion)

Performs an assertion on the state of the view after we force the data to be loaded.

Parameters
`assertion` | `ViewAssertion`

Returns
`ViewInteraction` | an `ViewInteraction` for more assertions or actions.

### inAdapterView

    DataInteraction inAdapterView (Matcher<View> adapterMatcher)

Selects a particular adapter view to operate on, by default we operate on any adapter view on the screen.

Parameters
`adapterMatcher` | `Matcher`

Returns
`DataInteraction` |

### inRoot

    DataInteraction inRoot (Matcher<Root> rootMatcher)

Causes this data interaction to work within the Root specified by the given root matcher.

Parameters
`rootMatcher` | `Matcher`

Returns
`DataInteraction` |

### onChildView

    DataInteraction onChildView (Matcher<View> childMatcher)

Causes perform and check methods to take place on a specific child view of the view returned by Adapter.getView()

Parameters
`childMatcher` | `Matcher`

Returns
`DataInteraction` |

### perform

    ViewInteraction perform (ViewAction... actions)

Performs an action on the view after we force the data to be loaded.

Parameters
`actions` | `ViewAction`

Returns
`ViewInteraction` | an `ViewInteraction` for more assertions or actions.

### usingAdapterViewProtocol

    DataInteraction usingAdapterViewProtocol (AdapterViewProtocol adapterViewProtocol)

Use a different AdapterViewProtocol if the Adapter implementation does not satisfy the AdapterView contract like (@code ExpandableListView)

Parameters
`adapterViewProtocol` | `AdapterViewProtocol`

Returns
`DataInteraction` |

- ## Interfaces

  - BaseLayerComponent
  - EspressoException
  - FailureHandler
  - IdlingResource
  - IdlingResource.ResourceCallback
  - UiController
  - ViewAction
  - ViewAssertion
  - ViewFinder
  - ViewInteractionComponent

- ## Classes

  - AmbiguousViewMatcherException.Builder
  - DataInteraction
  - Espresso
  - GraphHolder
  - IdlingPolicies
  - IdlingPolicy
  - NoMatchingViewException.Builder
  - PerformException.Builder
  - Root
  - Root.Builder
  - ViewInteraction

- ## Exceptions

  - AmbiguousViewMatcherException
  - AppNotIdleException
  - IdlingResourceTimeoutException
  - InjectEventSecurityException
  - NoActivityResumedException
  - NoMatchingRootException
  - NoMatchingViewException
  - PerformException