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法学如何在Android中创建水平ListView？
此示例演示了如何在Android中创建水平ListView。
步骤1 − 在Android Studio中创建一个新项目，转到文件 ⇒ 新建项目，并填写所有必需的详细信息以创建新项目。
步骤2 − 将以下代码添加到res/layout/activity_main.xml。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/rlMain" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="16dp" android:orientation="vertical"> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
步骤3 − 将以下代码添加到src/MainActivity.java
package app.com.sample;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private List<MovieModel> movieList = new ArrayList<>();
private MoviesAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = findViewById(R.id.recyclerView);
mAdapter = new MoviesAdapter(movieList);
LinearLayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
mLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareMovieData();
}
private void prepareMovieData() {
MovieModel movie = new MovieModel("Mad Max: Fury Road", "Action & Adventure", "2015");
movieList.add(movie);
movie = new MovieModel("Inside Out", "Animation, Kids & Family", "2015");
movieList.add(movie);
movie = new MovieModel("Star Wars: Episode VII - The Force Awakens", "Action", "2015");
movieList.add(movie);
movie = new MovieModel("Shaun the Sheep", "Animation", "2015");
movieList.add(movie);
movie = new MovieModel("The Martian", "Science Fiction & Fantasy", "2015");
movieList.add(movie);
movie = new MovieModel("Mission: Impossible Rogue Nation", "Action", "2015");
movieList.add(movie);
movie = new MovieModel("Up", "Animation", "2009");
movieList.add(movie);
movie = new MovieModel("Star Trek", "Science Fiction", "2009");
movieList.add(movie);
movie = new MovieModel("The LEGO MovieModel", "Animation", "2014");
movieList.add(movie);
movie = new MovieModel("Iron Man", "Action & Adventure", "2008");
movieList.add(movie);
movie = new MovieModel("Aliens", "Science Fiction", "1986");
movieList.add(movie);
movie = new MovieModel("Chicken Run", "Animation", "2000");
movieList.add(movie);
movie = new MovieModel("Back to the Future", "Science Fiction", "1985");
movieList.add(movie);
movie = new MovieModel("Raiders of the Lost Ark", "Action & Adventure", "1981");
movieList.add(movie);
movie = new MovieModel("Goldfinger", "Action & Adventure", "1965");
movieList.add(movie);
movie = new MovieModel("Guardians of the Galaxy", "Science Fiction & Fantasy", "2014");
movieList.add(movie);
mAdapter.notifyDataSetChanged();
}
}步骤7 − 将以下代码添加到src/MovieModel.java
package app.com.sample;
public class MovieModel {
private String title, genre, year;
public MovieModel() {
}
public MovieModel(String title, String genre, String year) {
this.title = title;
this.genre = genre;
this.year = year;
}
public String getTitle() {
return title;
}
public void setTitle(String name) {
this.title = name;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public String getGenre() {
return genre;
}
public void setGenre(String genre) {
this.genre = genre;
}
}步骤5 − 将以下代码添加到res/layout/movies_list.xml。
<?xml version="1.0" encoding="utf-8"?> <androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="250dp" android:layout_height="100dp" android:layout_margin="8dp"> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:padding="8dp"> <TextView android:id="@+id/title" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_toStartOf="@+id/year" android:textColor="#222222" android:textSize="16sp" android:textStyle="bold" /> <TextView android:id="@+id/year" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:textColor="#999999" /> <TextView android:id="@+id/genre" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" /> </RelativeLayout> </androidx.cardview.widget.CardView>
步骤6 − 将以下代码添加到src/MoviesAdapter.java
package app.com.sample;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class MoviesAdapter extends RecyclerView.Adapter<MoviesAdapter.MyViewHolder> {
private List<MovieModel> moviesList;
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title, year, genre;
MyViewHolder(View view) {
super(view);
title = view.findViewById(R.id.title);
genre = view.findViewById(R.id.genre);
year = view.findViewById(R.id.year);
}
}
public MoviesAdapter(List<MovieModel> moviesList) {
this.moviesList = moviesList;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.movie_list, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
MovieModel movie = moviesList.get(position);
holder.title.setText(movie.getTitle());
holder.genre.setText(movie.getGenre());
holder.year.setText(movie.getYear());
}
@Override
public int getItemCount() {
return moviesList.size();
}
}步骤7 − 将以下代码添加到androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
让我们尝试运行您的应用程序。我假设您已将实际的Android移动设备连接到您的计算机。要从Android Studio运行应用程序，请打开项目的某个活动文件，然后单击运行 
工具栏中的图标。选择您的移动设备作为选项，然后检查您的移动设备，它将显示您的默认屏幕 –
点击 这里 下载项目代码。
更新于：2020年7月3日
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