banner实现完后,接下来,是五个图标,带文字。
由于是一排,首先想到的是用LinearLayoutManager并且横向排列。
但是这5个item是平分整个布局,所以可以直接用GridLayoutManager
先add数据:
CommonModelListBean localList = new CommonModelListBean();
localList.setCommonModelListBean(model.getlocalNavList());
localList.setViewType(LOCAL_TYPE);
datas.add(localList);
添加布局:local.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="58dp"
android:orientation="horizontal"
android:background="@drawable/shape_radius"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="4dp">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/local_recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
添加item布局:local_item.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.li.gohome.util.CircleImageView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:id="@+id/local_image"
android:src="@mipmap/ic_launcher"
android:layout_width="30dp"
android:layout_height="30dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/local_text"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/local_image"
android:textSize="12dp"
android:text="ff"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
item布局记得父布局宽度为match_parent。
然后就是设置holder
public class LocalHolder extends RecyclerView.ViewHolder {
RecyclerView localRecycler;
public LocalHolder(@NonNull View itemView) {
super(itemView);
localRecycler = itemView.findViewById(R.id.local_recycler);
}
}
else if (viewType == LOCAL_TYPE) {
return new LocalHolder(LayoutInflater.from(parent.getContext())
.inflate(R.layout.local, parent, false));
}
接着在onBindViewHolder里绑定数据:
else if (holder instanceof LocalHolder) {
CommonModelListBean localBean = (CommonModelListBean) datas.get(position);
RecyclerView recyclerView = ((LocalHolder) holder).localRecycler;
recyclerView.setLayoutManager(new GridLayoutManager(context, 5, RecyclerView.VERTICAL, false));
recyclerView.setAdapter(new LocalAdapter(localBean.getCommonModelListBean(),1));
}
这里布局设置为VERTICAL,并且spanCount设置为5.
再看看LocalAdapter实现。
首先重写一个方法:
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
if (layoutManager instanceof GridLayoutManager) {
GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
return 1;
}
});
}
}
这里的SpanSize返回1,和上面的spancount结合,代表着一个iten占1/5的位置。
接着就是将HomePageAdapter传来的数据,绑定到item上面。
public class LocalItemHolder extends RecyclerView.ViewHolder {
CircleImageView image;
TextView textView;
public LocalItemHolder(@NonNull View itemView) {
super(itemView);
image = itemView.findViewById(R.id.local_image);
textView = itemView.findViewById(R.id.local_text);
}
}
if(itemType == 1) {
return new LocalItemHolder(LayoutInflater.from(parent.getContext())
.inflate(R.layout.local_item, parent, false));
}
if (holder instanceof LocalItemHolder) {
((LocalItemHolder) holder).image.setImageURL(localList.get(position).getIcon());
((LocalItemHolder) holder).textView.setText(localList.get(position).getTitle());
}
这里为什么有个itemtype呢。。
是因为在主界面,第4个布局,和这个第2个布局,情况很类似,如上图
所以和第二个布局,公用了一个adapter.
这2个布局的区别只有图片不设置圆形,以及有2排。
sub_item.xml:
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.li.gohome.util.MyImageView
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:id="@+id/sub_image"
android:src="@mipmap/ic_launcher"
android:layout_width="18dp"
android:layout_height="18dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/sub_text"
android:layout_marginTop="3dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/sub_image"
android:textSize="12dp"
android:text="ff"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
注意,父布局android:layout_height="wrap_content",因为有2排,不可以设置为match_parent。
另外自定义了一个imageview用来设置网络图片。
所以其他的都是一样的,只是在初始化adapter的时候,加一个itemtype.
还有就是加了一个分割线设置recyclerView.addItemDecoration(new ItemDecoration());
因为第一排和第二排,中间有一个距离20dp。
public class ItemDecoration extends RecyclerView.ItemDecoration{
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
outRect.set(0, 0, 0, 20);
}
}
所以将每个item的bottom距离设置为20.
这样就会导致两排都会距离下面20dp。
如果想最后一排不要这个距离,可以将父布局sub的总高度设置小一点,让这个最后一排的高度没有空间。
再来看第三个布局,第三个布局,分3块。所以可以设置一个公用的xml。
grid_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="88dp"
android:orientation="horizontal"
android:layout_marginLeft="7dp"
android:layout_marginRight="7dp"
android:layout_marginTop="4dp"
android:id="@+id/grid_item_layout">
<RelativeLayout
android:layout_width="121dp"
android:layout_height="88dp"
>
<TextView
android:id="@+id/main_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="8dp"
android:text="kkkk" />
<ImageView
android:id="@+id/main_image"
android:layout_width="121dp"
android:layout_height="50dp"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
<LinearLayout
android:layout_width="1dp"
android:layout_height="88dp"
android:background="@android:color/white"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="88dp"
android:layout_weight="1"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
<TextView
android:id="@+id/item1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="jjj" />
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/white"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<TextView
android:id="@+id/item2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="hhh" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="1dp"
android:layout_height="88dp"
android:background="@android:color/white"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="88dp"
android:layout_weight="1"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
<TextView
android:id="@+id/item3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="jjj" />
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/white"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<TextView
android:id="@+id/item4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="hhh" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
由于这三个布局的数据,都是GridNav.GridNavItem。
设置一个通用的bean:
public class GridItemBean extends ExampleBaseBean {
private GridNav.GridNavItem gridItemBean;
public GridNav.GridNavItem getGridItemBean() {
return gridItemBean;
}
public void setGridItemBean(GridNav.GridNavItem gridItemBean) {
this.gridItemBean = gridItemBean;
}
}
添加数据:
//grad_hotel
GridItemBean gradHotel = new GridItemBean();
gradHotel.setGridItemBean(model.getGridnav().getHotel());
gradHotel.setViewType(HOTEL_TYPE);
datas.add(gradHotel);
//grad_flight
GridItemBean gradFlight = new GridItemBean();
gradFlight.setGridItemBean(model.getGridnav().getFlight());
gradFlight.setViewType(FLIGHT_TYPE);
datas.add(gradFlight);
//grad_travel
GridItemBean gradTravel = new GridItemBean();
gradTravel.setGridItemBean(model.getGridnav().getTravel());
gradTravel.setViewType(TRAVEL_TYPE);
datas.add(gradTravel);
设置一个通用的holder
public class GridItemHolder extends RecyclerView.ViewHolder {
private LinearLayout gridLayout;
private ImageView mainImage;
private TextView mainText, Item1, Item2, Item3, Item4;
public GridItemHolder(@NonNull View itemView) {
super(itemView);
gridLayout = itemView.findViewById(R.id.grid_item_layout);
mainImage = itemView.findViewById(R.id.main_image);
mainText = itemView.findViewById(R.id.main_item);
Item1 = itemView.findViewById(R.id.item1);
Item2 = itemView.findViewById(R.id.item2);
Item3 = itemView.findViewById(R.id.item3);
Item4 = itemView.findViewById(R.id.item4);
}
}
三种type下,都用这个holder.
else if (viewType == HOTEL_TYPE || viewType == FLIGHT_TYPE || viewType == TRAVEL_TYPE) {
return new GridItemHolder(LayoutInflater.from(parent.getContext())
.inflate(R.layout.grid_item, parent, false));
}
接下来绑定数据,这个要考虑通用性:
else if (holder instanceof GridItemHolder) {
GridItemBean gridItemBean = (GridItemBean) datas.get(position);
setGridLayoutBG(((GridItemHolder) holder).gridLayout, gridItemBean.getGridItemBean());
mainItem(((GridItemHolder) holder).mainImage, ((GridItemHolder) holder).mainText, gridItemBean.getGridItemBean().getMainItem());
gridItem(((GridItemHolder) holder).Item1, ((GridItemHolder) holder).Item2, ((GridItemHolder) holder).Item3,
((GridItemHolder) holder).Item4, gridItemBean.getGridItemBean());
}
这里设置了三个方法,第一个setGridLayoutBG是设置整个item的背景色,
private void setGridLayoutBG(LinearLayout layout, GridNav.GridNavItem gridNavItem) {
Log.v("mm", gridNavItem.getStartColor());
GradientDrawable linearDrawableTop = getGrad(Color.parseColor("#" + gridNavItem.getStartColor()), Color.parseColor("#" + gridNavItem.getEndColor()));
layout.setBackground(linearDrawableTop);
}
public GradientDrawable getGrad(int startColor, int endColor) {
int[] colors = new int[]{startColor, endColor};
GradientDrawable linearDrawable = new GradientDrawable();
linearDrawable.setOrientation(GradientDrawable.Orientation.LEFT_RIGHT);
linearDrawable.setColors(colors);
linearDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
return linearDrawable;
}
第二个方法,设置左边那个大方块:
private void mainItem(ImageView imageView, TextView textView, CommonModel model) {
Glide.with(context).load(model.getIcon()).into(imageView);
textView.setText(model.getTitle());
}
第三个方法,设置右边四个小方块:
private void gridItem(TextView item1, TextView item2, TextView item3, TextView item4, GridNav.GridNavItem gridNavItem) {
item1.setText(gridNavItem.getItem1().getTitle());
item2.setText(gridNavItem.getItem2().getTitle());
item3.setText(gridNavItem.getItem3().getTitle());
item4.setText(gridNavItem.getItem4().getTitle());
}
具体代码如下:
https://github.com/doudousang/recyclerview_items.git
参考网址:
RecyclerView添加分割线最易懂解析
GridLayoutManager setSpanSizeLookup()方法
Android shape gradient背景渐变
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