GitHub - lumenghz/AlphaLayout: AlphaLayout

This project depends on another project called PullToRefresh written by me.

Preview

1. sample_ListView (with viewpager)

2. sample_RecyclerView

3. sample_ScrollView

Usage

Add jitpack repository to your root build file

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

Add the dependency

dependencies {
    compile 'com.github.lubeast:AlphaLayout:1.0.0'
}

Add AlphaLayout widget in your layout

<com.alhpalayout.AlphaLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/alpha_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:headerLayout="@layout/layout_header"
    app:transparent_distance="150dp"
    tools:context="com.alphalayout.activity.ListSampleActivity">

    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:divider="@null"
        android:dividerHeight="0dp" />

</com.alhpalayout.AlphaLayout>

implements AlphaLayout.OnRefreshListener in your Activity

    @Override
    public void onRefresh() {
        alphaLayout.postDelayed(new Runnable() {
            @Override
            public void run() {
                alphaLayout.setRefreshing(false);
            }
        }, REFRESH_DELAY);
    }

    @Override
    public void onScroll(int direction, float percent) {
        if (direction == AlphaLayout.DIRECTION_DOWN) {
            ViewCompat.setAlpha(alphaLayout.getHeaderLayout(), 1.0f - percent);
        } else {
            alphaLayout.getHeaderLayout().getBackground().setAlpha((int) (255 * percent));
            mTitleView.getBackground().mutate().setAlpha((int) (255 * (1 - percent)));
        }
    }

Attention

You should use AlphaScrollView which been provided instead of ScrollView.
I also provided AlphaHeaderLayout which can make good performance easily.

See sample project for detail

Download Sample apk

1. Fir.im

#### 2.download apk directly [release_1.0.0_github.apk](https://raw.githubusercontent.com/lubeast/alphalayout/master/art/alpha-release-1.0.0-github.apk)