本文介绍了在 Vertical ViewPager 中实现 ViewPager的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在显示数据集合的项目中使用了
I have used Vertical Viewpager in my project which displays a collection of data. And In single data(item), I have more images to display. So I tried with viewpager.
But when I scroll horizontally, it blocks vertical Viewpager(Parent) . That means, If I am scrolling horizontally in first item, I can see all the images but I can't move to next item in parent viewpager.
Then I tried with RecyclerView with PagerSnapHelper like
RecyclerView normalImageDisplay=layout.findViewById(R.id.recycler_view);
normalImageDisplay.setAdapter(new NewsSlidingFullImageAdapter(context,nhBean.getImageUrl()));
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(context,LinearLayoutManager.HORIZONTAL,false)
{
@Override
public boolean canScrollVertically() {
return false;
}
};
normalImageDisplay.setLayoutManager(mLayoutManager);
SnapHelper snapHelper = new PagerSnapHelper();
snapHelper.attachToRecyclerView(normalImageDisplay);
The same problem occurs. I searched a lot. I found some similar questions but there is no answer for it.
For more detail:
My scenario:
I need to display image with text and some buttons in each item . I have done it with Vertical Viewpager. But in some items, the image count is more than one. So I decided to use horizontal viewpager. It works but as I said in question, there is a problem in scrolling. It blocks the parent viewpager(Vertical Viewpager). It means, if i scroll vertically on the Image after some horizontal swipes, it blocks moving to next item.
Help me to get out of it. Thanks in advance!!!
解决方案
You can use Vertical
RecyclerViewwith Horizontal ViewPager
Here is the sample demo of your requirement with some bonus modification hope it helps you
MainActivity
public class MainActivity extends AppCompatActivity {
RecyclerView myRecyclerView;
private ArrayList<DataModel> arrayList = new ArrayList<>();
DataAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myRecyclerView = findViewById(R.id.myRecyclerView);
myRecyclerView.setHasFixedSize(true);
myRecyclerView.setLayoutManager(new LinearLayoutManager(this));
addData();
adapter = new DataAdapter(this, arrayList);
myRecyclerView.setAdapter(adapter);
}
private void addData() {
DataModel dataModel = new DataModel();
dataModel.setTitle("Image collection One");
ArrayList<Integer> list= new ArrayList<>();
for (int i = 0; i < 5; i++) {
list.add(R.drawable.kid);
}
dataModel.setArrayList(list);
arrayList.add(dataModel);
DataModel dataModel2 = new DataModel();
dataModel2.setTitle("Image collection Two");
ArrayList<Integer> list2= new ArrayList<>();
for (int i = 0; i < 5; i++) {
list2.add(R.drawable.nilesh);
}
dataModel2.setArrayList(list2);
arrayList.add(dataModel2);
DataModel dataModel3 = new DataModel();
dataModel3.setTitle("Image collection Three");
ArrayList<Integer> list3= new ArrayList<>();
for (int i = 0; i < 5; i++) {
list3.add(R.drawable.kid);
}
dataModel3.setArrayList(list3);
arrayList.add(dataModel3);
DataModel dataModel4 = new DataModel();
dataModel4.setTitle("Image collection Four");
ArrayList<Integer> list4= new ArrayList<>();
for (int i = 0; i < 5; i++) {
list4.add(R.drawable.nilesh);
}
dataModel4.setArrayList(list4);
arrayList.add(dataModel4);
}
}
R.layout.activity_main
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/myRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
DataAdapter
public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
private Context context;
private ArrayList<DataModel> arrayList;
public DataAdapter(Context context, ArrayList<DataModel> arrayList) {
this.context = context;
this.arrayList = arrayList;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.custom_layout, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
holder.tvTitle.setText(arrayList.get(position).getTitle());
ImageAdapter imageAdapter= new ImageAdapter(context,arrayList.get(position).getArrayList());
holder.myViewPager.setAdapter(imageAdapter);
holder.myTabLayout.setupWithViewPager(holder.myViewPager, true);
}
@Override
public int getItemCount() {
return arrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ViewPager myViewPager;
TextView tvTitle;
Button myButton;
TabLayout myTabLayout;
public ViewHolder(View itemView) {
super(itemView);
myViewPager=itemView.findViewById(R.id.myViewPager);
tvTitle=itemView.findViewById(R.id.tvTitle);
myButton=itemView.findViewById(R.id.myButton);
myTabLayout=itemView.findViewById(R.id.myTabLayout);
myButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, "clicked position : "+getAdapterPosition(), Toast.LENGTH_SHORT).show();
}
});
}
}
}
R.layout.custom_layout
<android.support.v7.widget.CardView 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:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardElevation="4dp"
app:cardUseCompatPadding="true"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#199bd2"
android:textSize="30sp"
android:textStyle="bold"
tools:text="Nilesh Rathod" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="250dp">
<android.support.v4.view.ViewPager
android:id="@+id/myViewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v4.view.ViewPager>
<android.support.design.widget.TabLayout
android:id="@+id/myTabLayout"
app:tabBackground="@drawable/tab_selector"
app:tabGravity="center"
android:layout_alignParentBottom="true"
app:tabIndicatorHeight="0dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
<Button
android:id="@+id/myButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Click Me" />
</LinearLayout>
</android.support.v7.widget.CardView>
ImageAdapter
public class ImageAdapter extends PagerAdapter {
ArrayList<Integer> arrayList= new ArrayList<>();
private LayoutInflater inflater;
private Context context;
public ImageAdapter( Context context,ArrayList<Integer>imageArray) {
this.arrayList = imageArray;
this.context = context;
inflater= LayoutInflater.from(context);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object instantiateItem(ViewGroup view, int position) {
View imageLayout = inflater.inflate(R.layout.pager_layout, view, false);
assert imageLayout != null;
final ImageView imageView = (ImageView) imageLayout
.findViewById(R.id.image);
imageView.setImageResource(arrayList.get(position));
view.addView(imageLayout, 0);
return imageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public Parcelable saveState() {
return null;
}
}
R.layout.pager_layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="1dip" >
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:layout_gravity="center"
android:src="@mipmap/ic_launcher"
android:scaleType="centerCrop" />
</LinearLayout>
DataModel
public class DataModel {
String title;
ArrayList<Integer> arrayList= new ArrayList<>();
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public ArrayList<Integer> getArrayList() {
return arrayList;
}
public void setArrayList(ArrayList<Integer> arrayList) {
this.arrayList = arrayList;
}
}
tab_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/selected_dot"
android:state_selected="true"/>
<item android:drawable="@drawable/default_dot"/>
</selector>
@drawable/selected_dot
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape
android:innerRadius="0dp"
android:shape="ring"
android:thickness="8dp"
android:useLevel="false">
<solid android:color="@color/colorAccent"/>
</shape>
</item>
</layer-list>
@drawable/default_dot
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape
android:innerRadius="0dp"
android:shape="ring"
android:thickness="8dp"
android:useLevel="false">
<solid android:color="@android:color/darker_gray"/>
</shape>
</item>
</layer-list>
OUTPUT
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