java - Android CardView 填充错误

Question

---TLDR---

我正在学习一个教程，其中在 cardview 和 recyclerview 的帮助下，我应该能够像这样在彼此下面列出文本:它应该是什么样子(不需要图像)

实际情况如何

---问题---

正如标题和图片所示，似乎 2 个 cardview 项目之间有一个巨大的填充，这显然不是我想要的。我希望它们彼此靠近，如另一张照片所示。

请记住，我是一个 super 新手程序员 :D。提前感谢您的所有回答。

---代码---

cards_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:tag="cards main container">

        <android.support.v7.widget.CardView
            android:layout_width="300dp"
            android:layout_height="60dp"
            xmlns:card_view="http://schemas.android.com/apk/res-auto"
            card_view:cardElevation="5dp"
            card_view:cardUseCompatPadding="true"
            card_view:cardBackgroundColor="#FFF"
            android:id="@+id/card_view"
            android:layout_gravity="center_horizontal">
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="10dp"
                        android:text="Marketing Tip"
                        android:id="@+id/textviewName"
                        android:textColor="#000"/>

                </LinearLayout>

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

</LinearLayout>

HomeActivity.java

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import java.util.ArrayList;

public class HomeActivity extends AppCompatActivity {

    private static RecyclerView.Adapter adapter;
    private RecyclerView.LayoutManager layoutManager;
    private static RecyclerView recyclerView;
    private static ArrayList<DataModel> data;
    static View.OnClickListener myOnClickListener;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        setTitle("Home");


        myOnClickListener = new myOnClickListener(this);


        recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        recyclerView.setHasFixedSize(true);

        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setItemAnimator(new DefaultItemAnimator());

        data = new ArrayList<DataModel>();
        for (int i = 0; i < MyData.nameArray.length; i++) {
            data.add(new DataModel(
                    MyData.nameArray[i],
                    MyData.id_[i]
            ));

            adapter = new CustomAdapter(data);
            recyclerView.setAdapter(adapter);

        }

    }

        private static class myOnClickListener implements View.OnClickListener {

            private final Context context;

            private myOnClickListener(Context context) {
                this.context = context;
            }

            @Override
            public void onClick(View v) {
                //TODO WRITE THE CODE TO START AN ACTIVITY ONCE THE CARDVIEW IS CLICKED
            }
        }

}

CustomAdapter.java

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

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

    private ArrayList<DataModel> dataSet;

    public static class MyViewHolder extends RecyclerView.ViewHolder {

        TextView textviewName;


        public MyViewHolder(View itemView) {
            super(itemView);
            this.textviewName = (TextView)itemView.findViewById(R.id.textviewName);

        }
    }

    public CustomAdapter(ArrayList<DataModel> data){
        this.dataSet = data;

    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.cards_layout, parent, false);
        view.setOnClickListener(HomeActivity.myOnClickListener);

        MyViewHolder myViewHolder = new MyViewHolder(view);

        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int listPosition) {

        TextView textviewName = holder.textviewName;

        textviewName.setText(dataSet.get(listPosition).getName());


    }

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

DataModel.java

public class DataModel {
    String name;
    int id_;

    public DataModel(String name, int id_) {

        this.name = name;
        this.id_ = id_;
    }

    public String getName() {
        return name;
    }

    public int getId() {
        return id_;
    }
}

MyData.java

public class MyData {

    static String[] nameArray = {"Buzi", "Kocsog", "Fostalicska", "CiganyTibi"};

    static Integer[] id_ = {0, 1, 2, 3};
}

Answer 1

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:tag="cards main container">

        <android.support.v7.widget.CardView
            android:layout_width="300dp"
            android:layout_height="60dp"
            xmlns:card_view="http://schemas.android.com/apk/res-auto"
            card_view:cardElevation="5dp"
            card_view:cardUseCompatPadding="true"
            card_view:cardBackgroundColor="#FFF"
            android:id="@+id/card_view"
            android:layout_gravity="center_horizontal">
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">

                    <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginTop="10dp"
                        android:text="Marketing Tip"
                        android:id="@+id/textviewName"
                        android:textColor="#000"/>

                </LinearLayout>

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

</LinearLayout>

将其用作您的卡片 View 布局。您基本上将 match_parent 用于线性布局，导致 View 填满整个屏幕。将其更改为 wrap_content 应该可以完成这项工作。休息就好。