Parallax Layer Layout


Source link: https://github.com/SchibstedSpain/parallax-layer-layout

Parallax Layer Layout

Let's you add layered parallax effect to your Android views or images based on things like device rotation.

We use it at InfoJobs for our error and empty states.



Usage | Download | How it works | Customize | Contribute

Usage

In your layout wrap your layers inside a ParallaxLayerLayout:

<com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout
  android:id="@+id/parallax"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
  <View

android:id="@+id/layer_3"

android:layout_width="180dp"

android:layout_height="180dp"

android:background="@color/colorPrimaryDark" />
  <View

android:id="@+id/layer_2"

android:layout_width="120dp"

android:layout_height="120dp"

android:background="@color/colorPrimary" />
  <View

android:id="@+id/layer_1"

android:layout_width="80dp"

android:layout_height="80dp"

android:background="@color/colorAccent" />

</com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout>

In your code create a TranslationUpdater and link it with the ParallaxLayerLayout:

sensorTranslationUpdater = new SensorTranslationUpdater(this);
 parallaxLayout.setTranslationUpdater(sensorTranslationUpdater);
  // onResume sensorTranslationUpdater.registerSensorManager();
  // onPause sensorTranslationUpdater.unregisterSensorManager();

Note: Just for the sensor updater you'll need to register and unregister it in your onResume/onPause.

# Download Grab the latest version from jCenter:

dependencies {

compile 'com.schibsted.spain:parallax-layer-layout:1.1.1' 
}

How it works

The layout applies a maximum offset to each of its views, starting with a base offset and adding one offset increment for each layer.

The higher view in the Z index is the closest one from the user perspective so it will only move with the base offset. The further the view from the user, the more it will move.

The parallax effect is applied based on an horizontal and vertical translations, ranging from -1.0 to 1.0. This translation is provided by an external TranslationUpdater. The library includes some:

  • SensorTranslationUpdater: Updates the translation based on the orientation sensors (roll and pitch).
  • AnimatedTranslationUpdater: Applies the translation automatically as a continuous animation.

Customize

Parallax offset

You can change the default offset for the effect within your xml with the attributes parallaxOffsetBase and parallaxOffsetIncrement:

<com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  app:parallaxOffsetBase="10dp"
  app:parallaxOffsetIncrement="5dp">

The defaul values are 10dp for the base and 5dp for the increment

Vertical and horizontal effect scale

Sometimes you might want to reduce or increase the effect for vertical or horizontal movement.

<com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

app:parallaxScaleVertical="0.25"

>

In this example the views will move vertically a 25% with respect to what they move horizontally.

Note: The parallax scale doesn't scale the views, but rather the parallax movement

Custom Z index

By default the parallax effect is applied in the views Z index. This means that the last view in the layout will be the one closer to the user, and so it will move less; and the first view will be the furthest and will move more.

If you need a different parallax order you can change this behavior by overriding the views index with the attribute layout_parallaxZIndex:

<com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent">

<View

android:id="@+id/layer_2"

android:layout_width="180dp"

android:layout_height="180dp"

android:background="@color/colorPrimaryDark"

app:layout_parallaxZIndex="1" />

<View

android:id="@+id/layer_3"

android:layout_width="120dp"

android:layout_height="120dp"

android:background="@color/colorPrimary"

app:layout_parallaxZIndex="2" />

<View

android:id="@+id/layer_1"

android:layout_width="80dp"

android:layout_height="80dp"

android:background="@color/colorAccent"

app:layout_parallaxZIndex="0" />  </com.schibsted.spain.parallaxlayerlayout.ParallaxLayerLayout>

Static layer

You can disable the parallax effect in any of the views to stop them from moving with the attribute layout_parallaxEnabled:

<View
  android:id="@+id/layer_static"
  android:layout_width="180dp"
  android:layout_height="180dp"
  android:background="@color/colorPrimaryDark"
  app:layout_parallaxEnabled="false" />

Contribute

For bugs, requests, questions and discussions please use Github Issues.

Attributions

This library was developed by Rafa Vázquez with the idea of moving images from Alex Bailón for the Infojobs' Android application.

Device requirements

This layout needs a gyroscope powered device. Sadly, there are some low-end phones that doesn't have it. In that case, the layered will appear like a static image.

License

Copyright 2016 Schibsted Classified Media Spain S.L.
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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