TransparentToolBar

Introduction: TransparentToolBar 一个简单随着滚动控件滚动,不断改变颜色透明度的 ToolBar
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Tags:
View-ToolBar-透明度变化-

A simple transparent toolbar for Android

Screenshots

Transparent-Delegate-Toolbar use Delegate finish scroll change color to alpha

Gradle

Add it in your root build.gradle at the end of repositories:


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

Add the dependency:


    dependencies {
            compile 'com.github.ruzhan123:Transparent-Delegate-Toolbar:v1.0'
    }

Usage


    <zhan.transparent.widget.TransparentFrameLayout
        android:id="@+id/tool_bar"
        android:layout_width="match_parent"
        android:layout_height="48dp">

    mTransparentFrameLayout.setColorToBackGround(getResources().getColor(R.color.colorPrimary));
    mTransparentFrameLayout.setMaxOffset(getResources().getDimension(R.dimen.offset));

    mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
      @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        mDy += dy;
        mTransparentFrameLayout.updateTop(mDy);
      }
    });

Delegate

Implementing View

Custom


    public class TransparentToolBar extends Toolbar implements ITransparentDelegate {

    private TransparentDelegate mTransparentDelegate;

    public TransparentToolBar(Context context) {
    super(context);
    init();
    }

    public TransparentToolBar(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
    }

    public TransparentToolBar(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
    }

    private void init() {
    mTransparentDelegate = new TransparentDelegate(this);
    }

    @Override public void updateTop(float top) {
    mTransparentDelegate.updateTop(top);
    }

    @Override public void setMaxOffset(float offset) {
    mTransparentDelegate.setMaxOffset(offset);
    }

    @Override public void setColorToBackGround(int backGroundColor) {
    mTransparentDelegate.setColorToBackGround(backGroundColor);
    }

    ...

expand


    public interface OnTransparentListener {
      void onTransparentStart(float fraction);    //scroll to top, offset is 0

      void onTransparentEnd(float fraction);    //scroll to max offset

      void onTransparentUpdateFraction(float fraction);    //scrolling...
    }

Developed by

ruzhan - dev19921116@gmail.com

License

Copyright 2017 ruzhan

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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