<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapp">

    <!-- 声明服务需要的权限 -->
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    
    <application>
        <!-- 服务声明 -->
        <service
            android:name=".MyService"
            android:permission="com.example.myapp.PERMISSION_TO_START_SERVICE"
            android:exported="true">
            
            <!-- 可以添加intent-filter -->
            <intent-filter>
                <action android:name="com.example.myapp.MyService" />
            </intent-filter>
        </service>
    </application>
</manifest>

public class MyService extends Service {
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // 检查调用者权限
        if (checkCallingOrSelfPermission("com.example.myapp.PERMISSION_TO_START_SERVICE") 
            != PackageManager.PERMISSION_GRANTED) {
            // 没有权限则停止服务
            stopSelf();
            return START_NOT_STICKY;
        }
        
        // 服务逻辑代码
        return START_STICKY;
    }
    
    // 其他服务方法...
}