问题
Hi I am try to create a page as below,
I have a drawer layout and in the home screen I want to display notifications as in the screen shot. I am trying to do it by CardView but I didn't got any tutorial explaining how I can achieve this in CardView. I got tutorials for Cardview in the listView but not for my requirement. Can anybody tell me how I can achieve this?. What all the possible options I have for this in android?
回答1:
Search for RecyclerView in android, and Cardview. The below example is just a purpose to show how to create like the pic you added. To add n numbers of CardView read "How to use RecyclerView in android".
<HorizontalScrollView
android:layout_width="your_size"
android:layout_height="your_size"
android:id="@+id/horizontalScrollView"
android:layout_below="@+id/your_id"
android:scrollbars="none">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="2dp">
<android.support.v7.widget.CardView
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_marginStart="2dp"
android:padding="2dp"
android:id="@+id/cardThree"
android:layout_toEndOf="@+id/cardTwo"
android:background="@color/card_color">
//your view here like a Layout including textView.
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="250dp"
android:layout_height="match_parent"
android:padding="2dp"
android:id="@+id/cardOne"
android:background="@color/card_color">
<//your view here like a Layout including textView.
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_marginStart="2dp"
android:padding="2dp"
android:id="@+id/cardTwo"
android:layout_toEndOf="@+id/cardOne"
android:background="@color/card_color">
//your view here like a Layout including textView.
</android.support.v7.widget.CardView>
</RelativeLayout>
</HorizontalScrollView>
回答2:
custom_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="200dp"
android:layout_height="120dp">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.CardView>
<ImageView
android:id="@+id/imageView"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:contentDescription="@string/imageview"
android:src="@android:drawable/ic_menu_add" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_toEndOf="@+id/imageView"
android:layout_toRightOf="@+id/imageView"
android:contentDescription="@string/imageview2"
android:src="@android:drawable/ic_delete" />
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/imageView2"
android:layout_alignStart="@+id/imageView2"
android:layout_below="@+id/imageView2" />
<TextView
android:id="@+id/textview2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/textview"
android:layout_margin="16dp"
android:gravity="center" />
activity_recycler_main.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="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">
<android.support.v7.widget.RecyclerView
android:id="@+id/rv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
Information_Object.java
public class InformationObject {
private String post, time;
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getPost() {
return post;
}
public void setPost(String post) {
this.post = post;
}
}
RecyclerAdapter.java
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyRecyclerHolder> {
private LayoutInflater inflater;
private List<InformationObject> list;
RecyclerAdapter(Context context, List<InformationObject> list) {
inflater=LayoutInflater.from(context);
this.list = list;
}
@Override
public MyRecyclerHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new MyRecyclerHolder(inflater.inflate(R.layout.custom_layout, parent, false));
}
@Override
public void onBindViewHolder(MyRecyclerHolder holder, int position) {
holder.time.setText(list.get(position).getTime());
holder.post.setText(list.get(position).getPost());
}
@Override
public int getItemCount() {
return list.size();
}
public class MyRecyclerHolder extends RecyclerView.ViewHolder {
private ImageView imageview, imageview2;
private TextView post, time;
public MyRecyclerHolder(View itemView) {
super(itemView);
post = (TextView) itemView.findViewById(R.id.textview);
time = (TextView) itemView.findViewById(R.id.textview2);
imageview = (ImageView) itemView.findViewById(R.id.imageView);
imageview2 = (ImageView) itemView.findViewById(R.id.imageView2);
}
}
}
MainActivity.java
public class RecyclerMain extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recycler_main);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rv);
RecyclerAdapter recyclerAdapter = new RecyclerAdapter(this, getData());
recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));
recyclerView.setAdapter(recyclerAdapter);
}
private List<InformationObject> getData() {
//add information each of cardview
//load imageView by picasso
return null;
}
}
回答3:
studviewseat = findViewById(R.id.seats);
studviewseat.setNestedScrollingEnabled(true);
GridLayoutManager layoutManager = new GridLayoutManager(this,10
,GridLayoutManager.HORIZONTAL, false);
studviewseat.setLayoutManager(layoutManager);
int spanCount = 10;
int spacing = 50;
boolean includeEdge = true;
studviewseat.addItemDecoration(new Gridspcae(spanCount, spacing, includeEdge));
studviewseat.setItemAnimator(new DefaultItemAnimator());
list = new ArrayList<>();
if(studviewseat.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT){
studviewseat.setLayoutManager(new GridLayoutManager(this, 3));
}
else if (studviewseat.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE){
studviewseat.setLayoutManager(new GridLayoutManager(this, 5));
}
来源：https://stackoverflow.com/questions/39560767/how-to-create-horizontal-scroll-able-cardview