基于Android Studio 3.1.2
第一步:app/build.gradle 文件中添加依赖 版本号跟android-support-v7包一致
implementation 'com.android.support:recyclerview-v7:27.1.1'
//Glide图片加载库
implementation 'com.github.bumptech.glide:glide:4.2.0'
第二步:在activity_main.xml中添加布局
<?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"
tools:context=".MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
第三步:在layout文件下新建item_main.xml作为每个item的布局 暂时只放一个imageview
<?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="wrap_content">
<ImageView
android:id="@+id/imageview"
android:layout_width="wrap_content"
android:layout_height="250dp" />
</LinearLayout>
第四步:新建adapter文件夹 建立recyclerview对应adapter文件
public class MainRecyclerViewAdapter extends RecyclerView.Adapter<MainRecyclerViewAdapter.ViewHolder>{
private List<String> list;
private Context context;
//自定义ViewHolder,包含item的所有界面元素
public static class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
public ViewHolder(View view) {
super(view);
imageView = (ImageView) view.findViewById(R.id.imageview);
}
}
public MainRecyclerViewAdapter(Context context, List<String> list){
this.context = context;
this.list = list;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
String url = list.get(position);
if (url != null){
Glide.with(context).load(url).into(holder.imageView);
}
}
@Override
public int getItemCount() {
return list.size();
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_main, parent, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
}
第五步:在MainActivity中初始化recyclerview
public class MainActivity extends AppCompatActivity {
private List<String> list = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initList();
RecyclerView recyclerView = findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(new MainRecyclerViewAdapter(this.getApplicationContext(), list));
}
private void initList(){
for (int i = 1; i < 9; i++) {
//天堂图片网站图片
list.add("http://img.ivsky.com/img/bizhi/pre/201808/24/haianshang_de_dengta-00"+i+".jpg");
}
}
}
第六步:申请网络权限
<uses-permission android:name="android.permission.INTERNET" />
运行效果