RecyclerView项目未填满宽度 [英] RecyclerView items don't fill width
问题描述
我设计了一个带有地图片段和recyclerView的布局. 每个recyclerView项都是cardview(我已指定了xml布局).
I have designed a layout with map fragment and recyclerView. Each recyclerView item is cardview (I have specified give the xml layout).
问题是RecyclerView项目没有填满屏幕宽度. 在此处
The problem is RecyclerView item doesn't fill screen width. img here
我尝试将layout_width更改为fill_parent，match_parent ...，但无济于事
I tried to change layout_width to fill_parent, match_parent ... but it can't help
这是每个项目的布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:id="@+id/cardView">
<LinearLayout
android:id="@+id/locationItemView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="120px"
android:layout_height="120px"
android:id="@+id/imgIcon"
android:background="@drawable/image_bg"
android:layout_margin="5dp"
android:scaleType="fitCenter"
android:adjustViewBounds="true" />
<LinearLayout
android:id="@+id/layoutInfo"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView
android:id="@+id/txtName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Location Name"
android:textColor="#d5c645"
android:textStyle="bold"
android:textSize="20dp"
android:padding="3dp" />
<TextView
android:id="@+id/txtAddress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Location Address"
android:textSize="16dp"
android:padding="3dp" />
<TextView
android:id="@+id/txtDistance"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:text="Location Distance"
android:textSize="14dp"
android:textStyle="italic"
android:padding="2dp"
android:textAlignment="viewEnd" />
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
和 main_layout
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:map="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
android:layout_height="0px" android:id="@+id/map" tools:context=".Main"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_weight=".6"/>
<android.support.v7.widget.RecyclerView
android:id="@+id/locationList"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight=".4"
android:divider="#FEFFCC"
android:dividerHeight="1dp" />
</LinearLayout>
<ListView
android:id="@+id/navdrawer"
android:layout_width="250px"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="?attr/colorPrimaryDark"
android:choiceMode="singleChoice"
android:divider="@android:color/white"
android:dividerHeight="1dp"
android:drawSelectorOnTop="false"/>
</android.support.v4.widget.DrawerLayout>
希望任何人都可以帮助我.我坚持了三天. 谢谢.
Hope anyone can help me. I am stuck with it for 3 days. Thank you.
==================================== 编辑于19/11/15 我认为问题不是我的itemView布局，因为当我将其更改为GridLayout时，它仍然无法填充宽度. 这是我的RecyclerView的CustomAdapter
==================================== Edit on 19/11/15 I don't thing the problem is my itemView layout because when I change it to GridLayout it still doesn't fill the width. Here is my CustomAdapter for RecyclerView
public class LocationDetailsAdapter extends RecyclerView.Adapter<LocationDetailsViewHolder> {
Context _context;
ArrayList<LocationDetails> _data;
public LocationDetailsAdapter(Context _context, ArrayList<LocationDetails> _object) {
this._context = _context;
_data = _object;
}
@Override
public LocationDetailsViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View _v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_location,null );
LocationDetailsViewHolder _viewHolder = new LocationDetailsViewHolder(_v);
return _viewHolder;
}
@Override
public void onBindViewHolder(LocationDetailsViewHolder locationDetailsViewHolder, int i) {
LocationDetails _location = _data.get(i);
locationDetailsViewHolder._imgType.setImageResource(R.drawable.repair_img);
locationDetailsViewHolder._locationName.setText(_location.get_locationName());
locationDetailsViewHolder._locationAddress.setText(_location.get_locationAddress() + ", " + _location.get_district() + ", " + _location.get_province());
locationDetailsViewHolder._distance.setText(String.valueOf(_location.get_distance()) + " km");
locationDetailsViewHolder._locationName.setOnClickListener(clickListener);
locationDetailsViewHolder._imgType.setOnClickListener(clickListener);
locationDetailsViewHolder._locationAddress.setOnClickListener(clickListener);
locationDetailsViewHolder._locationName.setTag(locationDetailsViewHolder);
locationDetailsViewHolder._imgType.setTag(locationDetailsViewHolder);
locationDetailsViewHolder._locationAddress.setTag(locationDetailsViewHolder);
}
@Override
public int getItemCount() {
return (null != _data ? _data.size() : 0);
}
View.OnClickListener clickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
LocationDetailsViewHolder _holder = (LocationDetailsViewHolder)v.getTag();
int _pos = _holder.getPosition();
int _id = _data.get(_pos).get_id();
Intent _intent = new Intent(CommonFields._context, ItemView.class);
_intent.putExtra("LocationID",_id);
_intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
CommonFields._context.startActivity(_intent);
}
};
}
在这里我在主目录中获得RecylerView
and here I get RecylerView in main
_locationView = (RecyclerView)findViewById(R.id.locationList);
_locationView.setLayoutManager(new LinearLayoutManager(this));
_adapter = new LocationDetailsAdapter(Main.this, CommonFields._locationData);
_locationView.setAdapter(_adapter);
推荐答案
从LayoutInflater扩展View时，需要传递一个父参数才能使用layout_*属性.这是因为这些属性需要创建正确的LayoutParams类.这意味着您不能使用inflate(R.layout.*, null)，而必须为第二个参数传递ViewGroup.在大多数情况下，您还想使用该方法的三参数版本，并将false作为第三个参数传递.如果省略或true，则View会立即添加到父级，这会在onCreateViewHolder()之类的地方引起问题，因为该框架旨在稍后执行此操作.有关更多详细信息，请参见此答案.
When inflating a View from a LayoutInflater, you need to pass a parent parameter in order for layout_* attributes to be used. That's because these attributes need to create the correct LayoutParams class. That means that you can't use inflate(R.layout.*, null), but must instead pass a ViewGroup for the second parameter. In most cases, you also want to use the three-parameter version of the method and pass false as the third parameter. If this is omitted or true then the View is immediately added to the parent, which causes problems in places like onCreateViewHolder() because the framework is designed to perform this operation later instead. For more details, see this answer.
在您的情况下，您有一行
In your case, you have the line
View _v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_location,null );
您应该将其更改为
View _v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_location, viewGroup, false );
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