请给我一个Android 13 开发动态壁纸的完整示例的代码demo

在Android 13中动态壁纸功能相对复杂，因为API有一些变化，并且需要处理系统的权限请求。以下是一个简单的动态壁纸Service示例代码，用于创建一个基本的壁纸服务：

import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.service.wallpaper.WallpaperService;
import android.view.animation.Animation;

public class DynamicWallpaperService extends WallpaperService {

    private static final String ACTION_START_ANIMATION = "com.example.START_ANIMATION";
    private Animation mAnimation;

    @Override
    public void onCreate() {
        super.onCreate();
        // 初始化动画
        mAnimation = new MyAnimation(); // 自定义动画类
    }

    @Override
    public Engine onCreateEngine() {
        return new Engine(this);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mAnimation != null) {
            mAnimation.cancel();
        }
    }

    // 实现Engine接口，处理壁纸绘制
    class Engine extends WallpaperService.Engine {

        @Override
        public void onSurfaceCreated(SurfaceHolder holder) {
            super.onSurfaceCreated(holder);
            startAnimationIfNotRunning();
        }

        @Override
        public void onVisibilityChanged(SurfaceHolder holder, int visibility) {
            super.onVisibilityChanged(holder, visibility);
            if (visibility == SurfaceHolder.VISIBLE) {
                startAnimationIfNotRunning();
            } else {
                stopAnimation();
            }
        }

        @Override
        public void onSurfaceDestroyed(SurfaceHolder holder) {
            super.onSurfaceDestroyed(holder);
            stopAnimation();
        }

        private void startAnimationIfNotRunning() {
            if (!mAnimation.isRunning()) {
                mAnimation.start();
            }
        }

        private void stopAnimation() {
            mAnimation.stop();
        }

        @Override
        public void onDraw(Canvas canvas) {
            // 在这里绘制你的动态内容，例如：
            mAnimation.draw(canvas);
            // 更新屏幕
            canvas.save();
            canvas.restore();
        }

        // 处理启动动画的意图
        @Override
        public void onCommand(String action) {
            if (ACTION_START_ANIMATION.equals(action)) {
                startAnimationIfNotRunning();
            }
        }
    }

    // 定义动画类，这里仅做示例，你需要自定义动画逻辑
    class MyAnimation extends Animation {
        // ... 动画实现

        // 省略了动画的具体实现，包括start(), draw(), 和cancel()等方法
    }

    // 启动动画的广播接收者
    public static class WidgetReceiver extends AppWidgetProvider {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(ACTION_START_ANIMATION)) {
                ComponentName componentName = new ComponentName(context, DynamicWallpaperService.class);
                context.startService(new Intent(context, DynamicWallpaperService.class)
                        .setComponent(componentName));
            }
        }
    }