Android Viewpager 内外间距

Android使用Viewpager_内外边距


代码:

1、adapter:

java 复制代码
<?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="match_parent"
    android:background="@drawable/button_bg"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="20dp">

    <ImageView
        android:id="@+id/ivImg"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:scaleType="centerCrop" />

    <TextView
        android:id="@+id/tvName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:textSize="24dp"
        android:textStyle="bold" />

</LinearLayout>
java 复制代码
public class VpAdapter extends PagerAdapter {

    private Context mContext;
    private List<VpModel> mList;

    public VpAdapter(Context context, List<VpModel> list) {
        this.mContext = context;
        this.mList = list;
    }

    @Override
    public int getCount() {
        return mList == null ? 0 : mList.size();
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
        return view == object;
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        container.removeView((View) object);
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        View itemView = LayoutInflater.from(mContext).inflate(R.layout.item_vp, container, false);
        ImageView img = itemView.findViewById(R.id.ivImg);
        TextView name = itemView.findViewById(R.id.tvName);
        Glide.with(mContext).load(mList.get(position).getUrl()).into(img);
        name.setText(mList.get(position).getName());
        container.addView(itemView);
        return itemView;
    }
}

2、UI

java 复制代码
<?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="match_parent"
    android:clipChildren="false"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="50dp"
        android:text="VP Test"
        android:textSize="30dp" />

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="400dp"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="20dp"
        android:layout_marginRight="30dp"
        android:clipChildren="false" />

</LinearLayout>
java 复制代码
public class VpActivity extends ComponentActivity {

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

        List<VpModel> list = new ArrayList<>();
        list.add(new VpModel("https://st-gdx.dancf.com/gaodingx/1942/articles/0/20201117-160009-ff34.png","哦莫"));
        list.add(new VpModel("https://pic0.sucaisucai.com/11/50/11050520_2.jpg","伸手让世界闭嘴"));
        list.add(new VpModel("https://cdn.pixabay.com/photo/2015/03/18/11/02/sunset-679122_1280.jpg","街边的服务站"));
        ViewPager viewPager = findViewById(R.id.vp);
        viewPager.setOffscreenPageLimit(list.size());
        viewPager.setPageMargin(30);
        viewPager.setAdapter(new VpAdapter(this, list));
    }
}

3、数据类

java 复制代码
public class VpModel {

    private String url;
    private String name;

    public VpModel(String url, String name) {
        this.url = url;
        this.name = name;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
相关推荐
2501_929157682 小时前
Switch 20.5.0系统最新PSP模拟器懒人包
android·游戏·ios·pdf
用户093 小时前
Kotlin Flow的6个必知高阶技巧
android·面试·kotlin
用户093 小时前
Flutter插件与包的本质差异
android·flutter·面试
用户093 小时前
Jetpack Compose静态与动态CompositionLocal深度解析
android·面试·kotlin
聆风吟º6 小时前
【Spring Boot 报错已解决】别让端口配置卡壳!Spring Boot “Binding to target failed” 报错解决思路
android·java·spring boot
非专业程序员Ping14 小时前
HarfBuzz概览
android·ios·swift·font
Jeled15 小时前
「高级 Android 架构师成长路线」的第 1 阶段 —— 强化体系与架构思维(Clean Architecture 实战)
android·kotlin·android studio·1024程序员节
明道源码17 小时前
Kotlin 控制流、函数、Lambda、高阶函数
android·开发语言·kotlin
消失的旧时光-194319 小时前
Kotlin × Gson:为什么遍历 JsonObject 要用 entrySet()
android·kotlin·数据处理·1024程序员节
G果20 小时前
安卓APP页面之间传参(Android studio 开发)
android·java·android studio