问题
I need to know, when the user clicking on one item(or for example, whatsApp contacts) WhatsApp showing to the user one design with this picture example:
here is the recycle view items:
and i'm using :
http://code.tutsplus.com/tutorials/getting-started-with-recyclerview-and-cardview-on-android--cms-23465
Main-activity:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView rv = (RecyclerView)findViewById(R.id.rv);
rv.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(context);
rv.setLayoutManager(llm);
RVAdapter adapter = new RVAdapter(persons);
rv.setAdapter(adapter);
}
}
Mainactivity Xml layout:
<?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="match_parent"
android:padding="16dp"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cv"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/person_photo"
android:src="@mipmap/ic_launcher"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginRight="16dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/person_name"
android:layout_toRightOf="@+id/person_photo"
android:layout_alignParentTop="true"
android:textSize="30sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/person_age"
android:layout_toRightOf="@+id/person_photo"
android:layout_below="@+id/person_name"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rv"/>
</LinearLayout>
here is the Adaptor:
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder>{
@Override
public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.activity_main, viewGroup, false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
@Override
public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
personViewHolder.personName.setText(persons.get(i).name);
personViewHolder.personAge.setText(persons.get(i).age);
personViewHolder.personPhoto.setImageResource(persons.get(i).photoId);
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public int getItemCount() {
return persons.size();
}
List<Person> persons;
RVAdapter(List<Person> persons){
this.persons = persons;
}
public static class PersonViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView personName;
TextView personAge;
ImageView personPhoto;
PersonViewHolder(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
personName = (TextView)itemView.findViewById(R.id.person_name);
personAge = (TextView)itemView.findViewById(R.id.person_age);
personPhoto = (ImageView)itemView.findViewById(R.id.person_photo);
}
}
}
currently, there is an error in MainActivity Java codes:
cannot resolve symbol Contect and also for Person!
So, after this (i hope this fixed).
I need to when user clicked on the each item, It showing to us similar design, But, With names for each item.
Example: user clicked on item 2: Lavery Maiss
and then goto another activity or layout and show us this name.
and if user clicked on the item 1: Emma Wilson it show us in another activity same design for each item, But, with Emma Wilson name.
What should i do and what's wrong with my codes?
what we can do for showing this ?
Cheers!
回答1:
After researching about this, i found a good tutorial which is no one mention it. https://github.com/tarek360/Material-Animation-Samples
So, We need a Adaptor for doing this like below:
public class BlogRecyclerAdapter extends
RecyclerView.Adapter<BlogRecyclerAdapter.SimpleItemViewHolder> {
private List<Blog> items;
// Provide a reference to the views for each data item
// Provide access to all the views for a data item in a view holder
public final static class SimpleItemViewHolder extends RecyclerView.ViewHolder {
ImageView image;
TextView title;
TextView subTitle;
CardView cardView;
public SimpleItemViewHolder(View itemView) {
super(itemView);
image = (ImageView) itemView.findViewById(R.id.imageThumb);
title = (TextView) itemView.findViewById(R.id.title);
subTitle = (TextView) itemView.findViewById(R.id.subTitle);
cardView = (CardView) itemView.findViewById(R.id.cardView);
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public BlogRecyclerAdapter(List<Blog> items) {
this.items = items;
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return this.items.size();
}
// Create new items (invoked by the layout manager)
// Usually involves inflating a layout from XML and returning the holder
@Override
public SimpleItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.from(viewGroup.getContext()).
inflate(R.layout.blog_item, viewGroup, false);
return new SimpleItemViewHolder(itemView);
}
// Replace the contents of a view (invoked by the layout manager)
// Involves populating data into the item through holder
@Override
public void onBindViewHolder(SimpleItemViewHolder viewHolder, int position) {
viewHolder.image.setImageResource(items.get(position).getImageRes());
viewHolder.image.setTag(position);
viewHolder.title.setText(items.get(position).getTitle());
viewHolder.subTitle.setText(items.get(position).getSubTitle());
viewHolder.cardView.setCardBackgroundColor(items.get(position).getBackGroundColor());
}
}
Take a look at these codes:
// Replace the contents of a view (invoked by the layout manager)
// Involves populating data into the item through holder
@Override
public void onBindViewHolder(SimpleItemViewHolder viewHolder, int position) {
viewHolder.image.setImageResource(items.get(position).getImageRes());
viewHolder.image.setTag(position);
viewHolder.title.setText(items.get(position).getTitle());
viewHolder.subTitle.setText(items.get(position).getSubTitle());
viewHolder.cardView.setCardBackgroundColor(items.get(position).getBackGroundColor());
}
Here is a good example for doing this with Animation:
https://github.com/tarek360/Material-Animation-Samples/tree/master/app/src/main/java/com/tarek360/animationsamples
exactly what we need ;)
来源：https://stackoverflow.com/questions/30682580/implementing-an-recycleview-or-cardview-items-with-the-same-design-for-eachother