PullableView
marcorighini
21
Visit GitHub RepoPull To Refresh

PullableView

Enhanced Pull-To-Action layout

Demo

demo

Dependency

Add this in your root build.gradle file (not your module build.gradle file):

allprojects {
	repositories {
        maven { url "https://jitpack.io" }
    }
}

Then, add the library to your module build.gradle

dependencies {
    compile 'com.github.marcorighini:PullableView:latest.release.here'
}

Features

  • Pull gesture in UP, DOWN or BOTH directions
  • Scroll thresholding. Bound views are snapped to anchor position if scroll over threshold else are reset to default position
  • Bind views for animating (alpha and translation for now) them in respect to scroll

Usage

There is a sample provided which shows how to use the library. For completeness, here is all that is required to get PullableView working:

<com.marcorighini.lib.PullableView
    android:id="@+id/pullable_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    ....
</com.marcorighini.lib.PullableView>

Attributes

Attributes that may be added to PullableView xml tag or changed programmatically through PullableView properties:

  • anchorOffsetUp : integer corresponding to the anchor point for UP direction pull action. It's represented through the offset compared to the pullable_view top. It must be <= 0. Default: -pullable_view_top
  • anchorOffsetDown : integer corresponding to the anchor point for DOWN direction pull action. It's represented through the offset compared to the pullable_view bottom. It must be >= 0. Default: screen_height - pullable_view_bottom
  • scrollThresholdUp : integer corresponding to the threshold of the UP direction pull action. It must be <= 0. If scroll amount (negative) is below (greater in absolute value) this value bound views will animate to snap value (translation or alpha) else bound views will reset to default values. Default: anchorOffsetUp/2
  • scrollThresholdDown : integer corresponding to the threshold of the DOWN direction pull action. It must be >= 0. If scroll amount is above this value bound views will animate to snap value (translation or alpha) else bound views will reset to default values. Default: anchorOffsetBottom/2
  • direction : enum string value (UP,DOWN,BOTH) enabling pull directions. Default: BOTH

Bound Views and animations

PullableView has the property

var boundViews = listOf<BoundView>()

This represents the views that are animated accordingly to the scroll amount. For example you can change the alpha or translation of these bound views. Note that tipically you have to add pullable_view to this list to have pull-to-refresh like gesture over it.

Check the sample for usage.

Listener

Pullable View has the property

interface PullListener {
	fun onReset()
        fun onPullStart()
        fun onAnchor()
}
var listener: PullListener? = null

Ideally when bound views are snapped to anchor you want to perform some tasks. When tasks are finished you have to call

fun resetAnimated()
fun resetImmediate()

over pullable_view for resetting bound views to default positions

License

Copyright 2017 Marco Righini

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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