android - 我如何为行 recyclerview 设置重力

Question

我想在我的 recyclerview 中将重力设置为正确，我为所有布局设置了正确的重力，但是当水平回收 View 只有一行时，它没有将重力设置为正确看图了解我picture

我希望图片中的红色圆圈设置重力向右。

我的 CityDetailACT Activity :

package safarkon.com.safarkon.cityDetail;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import java.util.ArrayList;
import safarkon.com.safarkon.R;

public class CityDetailACT extends AppCompatActivity {
    private RecyclerViewDataAdapter rAdapterBazar;
    ArrayList<SectionDataModelRecyclerModel> allSampleData;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.city_detail_act);

        allSampleData = new ArrayList<SectionDataModelRecyclerModel>();
        rvListBazar.setHasFixedSize(true);
        rvListBazar.setNestedScrollingEnabled(false);
        rAdapterBazar = new RecyclerViewDataAdapter(CityDetailACT.this, allSampleData);
        rvListBazar.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
        rvListBazar.setAdapter(rAdapterBazar);

        createDummyData();

    }

    public void createDummyData() {
        for (int i = 2; i <= 8; i++) {
            SectionDataModelRecyclerModel dm = new SectionDataModelRecyclerModel();

            String cat = null;
            if (i == 1){
                //cat = "بدانید";
                dm.setHeaderTitle("هر آنچه درمورد "+city+" باید بدانید");

            }else if (i == 2){
                cat = "بازار";
                dm.setHeaderTitle("بازارهای "+city);
            }else if (i == 3){
                cat = "دیدنی";
                dm.setHeaderTitle("معرفی مکانهای گردشگری "+city);
            }else if (i == 4){
                cat = "تاریخی";
                dm.setHeaderTitle("دیدنی های تاریخی "+city);
            }else if (i == 5){
                cat = "پارک";
                dm.setHeaderTitle("پارک های "+city);
            }else if (i == 6){
                cat = "مسجد";
                dm.setHeaderTitle("مسجدها و امام زاده های "+city);
            }else if (i == 7){
                cat = "موزه";
                dm.setHeaderTitle("موزه های "+city);
            }else if (i == 8){
                cat = "مدرسه";
                dm.setHeaderTitle("مدرسه های "+city);
            }
            ArrayList<RecyclerModel> singleItem = new ArrayList<RecyclerModel>();

            LoadData.firstLoadData(this,rAdapterBazar,singleItem,rvListBazar);

            dm.setAllItemsInSection(singleItem);
            allSampleData.add(dm);
        }
    }

}

RecyclerViewDataAdapter:

package safarkon.com.safarkon.cityDetail;
    import android.content.Context;
    import android.support.v7.widget.LinearLayoutManager;
    import android.support.v7.widget.RecyclerView;
    import android.support.v7.widget.StaggeredGridLayoutManager;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.TextView;

    import java.util.ArrayList;
    import safarkon.com.safarkon.R;
    public class RecyclerViewDataAdapter extends RecyclerView.Adapter<RecyclerViewDataAdapter.ItemRowHolder> {

        private ArrayList<SectionDataModelRecyclerModel> dataList;
        private Context mContext;

        public RecyclerViewDataAdapter(Context context, ArrayList<SectionDataModelRecyclerModel> dataList) {
            this.dataList = dataList;
            this.mContext = context;
        }

        @Override
        public ItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
            View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item_row_nested_list, null);
            ItemRowHolder mh = new ItemRowHolder(v);
            return mh;
        }

        @Override
        public void onBindViewHolder(ItemRowHolder itemRowHolder, int i) {

            final String sectionName = dataList.get(i).getHeaderTitle();

            ArrayList singleSectionItems = dataList.get(i).getAllItemsInSection();

            itemRowHolder.itemTitle.setText(sectionName);

            RecyclerAdapter itemListDataAdapter = new RecyclerAdapter(singleSectionItems,"a",mContext);

            itemRowHolder.recycler_view_list.setHasFixedSize(true);
            itemRowHolder.recycler_view_list.setItemViewCacheSize(20);
            itemRowHolder.recycler_view_list.setDrawingCacheEnabled(true);
            itemRowHolder.recycler_view_list.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
            itemRowHolder.recycler_view_list.setNestedScrollingEnabled(false);
            itemRowHolder.recycler_view_list.setLayoutManager(new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.HORIZONTAL));
            itemRowHolder.recycler_view_list.setAdapter(itemListDataAdapter);
            itemRowHolder.recycler_view_list.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, true));

        }

        @Override
        public int getItemCount() {
            return (null != dataList ? dataList.size() : 0);
        }

        public class ItemRowHolder extends RecyclerView.ViewHolder {

            protected TextView itemTitle;

            protected RecyclerView recycler_view_list;

            protected TextView txMore;



            public ItemRowHolder(View view) {
                super(view);

                this.itemTitle =  view.findViewById(R.id.itemTitle);
                this.recycler_view_list =view.findViewById(R.id.recycler_view_list);
                this.txMore=  view.findViewById(R.id.txMore);


            }

        }

    }

回收器适配器:

package safarkon.com.safarkon.cityDetail;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.iarcuschin.simpleratingbar.SimpleRatingBar;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import safarkon.com.safarkon.R;

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> {

    private ArrayList<RecyclerModel> recyclerModels; // this data structure carries our title and description
    Context c;
    String rowLayoutType;
    int width;
    public RecyclerAdapter(ArrayList<RecyclerModel> recyclerModels,String rowLayoutType, Context c) {
        this.recyclerModels = recyclerModels;
        this.rowLayoutType = rowLayoutType;
        this.c = c;
    }

    public RecyclerAdapter(ArrayList<RecyclerModel> recyclerModels,String rowLayoutType, Context c,int width) {
        this.recyclerModels = recyclerModels;
        this.rowLayoutType = rowLayoutType;
        this.c = c;
        this.width = width;
    }

    @Override
    public RecyclerAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        return new MyViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.row_city_detail, parent, false));

    }
    @Override
    public void onBindViewHolder(final RecyclerAdapter.MyViewHolder holder,final int position) {

            Picasso.with(c)
                    .load(recyclerModels.get(position).getPicture())
                    .resize(width,0)
                    .into(holder.imageView);
            holder.tx_onvan.setText(recyclerModels.get(position).getOnvan());
            holder.tx_position.setText(recyclerModels.get(position).getPosition());
            holder.ratingBar.setRating((float)recyclerModels.get(position).getRate());
            holder.txCountRateAndComment.setText("( "+recyclerModels.get(position).getCountRateAndComment() + " نظر" + " )");

    }

    @Override
    public int getItemCount() {
        return recyclerModels.size();
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView txCountRateAndComment;;
        TextView tx_onvan;
        TextView tx_position;
        ImageView imageView;
        SimpleRatingBar ratingBar;
        MyViewHolder(View view) {
            super(view);

            tx_onvan=  itemView.findViewById(R.id.nameTxt);
            tx_position=  itemView.findViewById(R.id.txPostion);
            imageView = itemView.findViewById(R.id.imageView2);
            ratingBar=  itemView.findViewById(R.id.simpleRatingBar);
            txCountRateAndComment = itemView.findViewById(R.id.txCountRateAndComment);

        }
    }
}

city_detail_act:

    <?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"
    android:gravity="top"

    >
    <android.support.v7.widget.Toolbar
        android:id="@+id/tolbar_story"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#66cc66"
        android:minHeight="?attr/actionBarSize"
        android:theme="?attr/actionBarTheme"
        app:contentInsetLeft="0dp"
        app:contentInsetStart="0dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:gravity="center"

            android:orientation="horizontal"
            tools:layout_editor_absoluteX="16dp">

            <ImageView
                android:id="@+id/imgTooTitlelbarMainActf"
                android:layout_width="40dp"
                android:layout_height="40dp"


                android:layout_marginStart="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginTop="8dp"
                android:layout_marginBottom="8dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:srcCompat="@drawable/adamak" />

            <ImageView
                android:id="@+id/imgTooTitlelbarMainAct"
                android:layout_width="50dp"
                android:layout_height="50dp"

                android:layout_marginStart="180dp"
                android:layout_marginLeft="180dp"
                android:layout_marginTop="3dp"
                android:layout_marginEnd="181dp"
                android:layout_marginRight="181dp"
                android:layout_marginBottom="3dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:srcCompat="@drawable/title" />

            <ImageView
                android:id="@+id/imgNavigationView"
                android:layout_width="wrap_content"
                android:layout_height="30dp"

                android:layout_marginTop="8dp"
                android:layout_marginEnd="16dp"
                android:layout_marginRight="16dp"
                android:layout_marginBottom="8dp"
                android:adjustViewBounds="false"
                android:scaleType="centerInside"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:srcCompat="@drawable/dot" />


        </android.support.constraint.ConstraintLayout>


    </android.support.v7.widget.Toolbar>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="26dp"
                android:layout_marginLeft="13dp"
                android:layout_marginRight="13dp"
                android:layout_marginBottom="12dp"
                android:gravity="right"
                android:orientation="horizontal">


                <TextView
                    android:id="@+id/txMore"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:fontFamily="@font/adobearabicbold"
                    android:text="مشاهده همه..."
                    android:textSize="12sp"

                    />


                <TextView
                    android:id="@+id/txYHinCityDetail"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="3dp"
                    android:fontFamily="@font/adobearabicbold"
                    android:text="هر آنچه درمورد قم باید بدانید"
                    android:textSize="24sp" />


            </LinearLayout>


            <android.support.v7.widget.RecyclerView
                android:id="@+id/rvListBazar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />


        </LinearLayout>
    </android.support.v4.widget.NestedScrollView>

</LinearLayout>

当水平回收 View 只有一行时，我想将重力设置为右边，因为当水平 recyclerview 有更多一行时，它的重力设置为正确,我该怎么做？

Answer 1

在您的 RecyclerViewDataAdapter 中，将 setLayotManager 的最后一个参数设置为 false，如果这不起作用，请将 LinearLayoutManager.setStatckFromEnd 属性设置为 true