向上滚动布局高度应平行减小

Question

我正在设计一个布局，其中Row下面有一个recyclerView 布局，当我向上滚动行布局应平行减少并固定在某个位置。第一个图像在滚动之前，第二个图像在滚动之后。

Answer 1

您可以使用这些令人敬畏的图书馆来完成您的工作。

1-对于ListView

  

ParallaxListView

对于RecyclerView

  

Android Parallax Recycleview

回收商视图的实施

第1步。将JitPack存储库添加到构建文件

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

第2步。添加依赖项

dependencies {
    compile 'com.github.kanytu:android-parallax-recyclerview:v1.7'
}

<强> USAGE （示例项目 - https://github.com/kanytu/example-parallaxrecycler）

• 创建对象列表并将其传递给ParallaxRecyclerAdapter

  的构造函数

  List<String> myContent = new ArrayList<String>(); // or another object list
  ParallaxRecyclerAdapter<String> adapter = new ParallaxRecyclerAdapter<String>(content) {
      @Override
      public void onBindViewHolderImpl(RecyclerView.ViewHolder viewHolder, ParallaxRecyclerAdapter<String> adapter, int i) {
        // If you're using your custom handler (as you should of course) 
        // you need to cast viewHolder to it.
        ((MyCustomViewHolder) viewHolder).textView.setText(myContent.get(i)); // your bind holder routine.
      }
  
      @Override
      public RecyclerView.ViewHolder onCreateViewHolderImpl(ViewGroup viewGroup, final ParallaxRecyclerAdapter<String> adapter, int i) {
        // Here is where you inflate your row and pass it to the constructor of your ViewHolder
        return new MyCustomViewHolder(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.myRow, viewGroup, false));
      }
  
      @Override
      public int getItemCountImpl(ParallaxRecyclerAdapter<String> adapter) {
        // return the content of your array
        return myContent.size();
      }
  };`
  

• 现在我们设置视差标头。您还需要传递RecyclerView来实现滚动侦听器。

  myAdapter.setParallaxHeader(LayoutInflater.from(this).inflate(R.layout.myParallaxView, myRecycler, false), myRecyclerView);
  

您可以实施其他一些听众：

// Event triggered when you click on a item of the adapter.
void onClick(View v, int position); 

// Event triggered when the parallax is being scrolled.
void onParallaxScroll(float percentage, float offset, View parallax);