React Native android 按钮的波纹效果

TouchableNativeFeedback 

A wrapper for making views respond properly to touches (Android only). On Android this component uses native state drawable to display touch feedback. At the moment it only supports having a single View instance as a child node, as it's implemented by replacing
that View with another instance of RCTView node with some additional properties set.

Background drawable of native feedback touchable can be customized with 

background

property.

Example:

renderButton:

function()
{

return
( <TouchableNativeFeedback onPress={this._onPressButton}
background={TouchableNativeFeedback.SelectableBackground()}>
<View style={{width:

150, height:

100, backgroundColor:

'red'}}>
<Text style={{margin:

30}}>Button</Text>
</View> </TouchableNativeFeedback>
);},

Props 

TouchableWithoutFeedback
props... 

background backgroundPropType 

Determines the type of background drawable that's going to be used to display feedback. It takes an object with 

type

 property and extra data depending on the 

type

.
It's recommended to use one of the static methods to generate that dictionary.

Methods 

static SelectableBackground(0) 

Creates an object that represents android theme's default background for selectable elements (?android:attr/selectableItemBackground).

static SelectableBackgroundBorderless(0) 

Creates an object that represent android theme's default background for borderless selectable elements (?android:attr/selectableItemBackgroundBorderless). Available on android API level 21+.

static Ripple(color,
borderless) 

Creates an object that represents ripple drawable with specified color (as a string). If property 

borderless

 evaluates to true the ripple will render outside of the view bounds
(see native actionbar buttons as an example of that behavior). This background type is available on Android API level 21+.

Parameters:

Name and Type	Description
color string	The ripple color
borderless boolean	If the ripple can render outside it's bounds

<Button
background={ (Platform.OS === 'android') ? TouchableNativeFeedback.Ripple('#f39c12', true) : null }
style={ styles.buttonStyle }
textStyle={ styles.textStyle }
onPress={ () => {
console.log('world!')
} }>
Hello
</Button>

检测平台如果是Android平台，就设置波纹效果

background={ (Platform.OS === 'android') ? TouchableNativeFeedback.Ripple('#f39c12', true) : null }