
我正在尝试在Kotlin中实现Mike Penz的NavigationDrawer(https://github.com/mikepenz/MaterialDrawer)的某些部分.从那以后,我只遇到了几个问题,主要是关于 *** 作符的.这是实例化抽屉本身的代码的一部分.除了在int和Long变量上使用==运算符的地方,AndroID Studio不会引发任何错误:
// Create the Drawer result = DrawerBuilder() .withSlIDerBackgroundcolor(ContextCompat.getcolor(applicationContext, R.color.top_header)) .withActivity(this) .withToolbar(toolbar) .withHasStableIDs(true) .withItemAnimator(AlphaCrossFadeAnimator()) .withAccountheader(headerResult!!) .addDrawerItems( PrimaryDrawerItem().withname(R.string.drawer_item_profile).withIcon(FontAwesome.Icon.faw_user).withIDentifIEr(1).withSelectable(false).withIconcolor(ContextCompat.getcolor(applicationContext, R.color.icon_grey)).withTextcolor(ContextCompat.getcolor(applicationContext, R.color.stroke)), PrimaryDrawerItem().withname(R.string.drawer_item_create).withIcon(FontAwesome.Icon.faw_paint_brush).withIDentifIEr(2).withSelectable(false).withIconcolor(ContextCompat.getcolor(applicationContext, R.color.icon_grey)).withTextcolor(ContextCompat.getcolor(applicationContext, R.color.stroke)), PrimaryDrawerItem().withname(R.string.drawer_item_yaanich_news).withIcon(FontAwesome.Icon.faw_newspaper_o).withIDentifIEr(3).withSelectable(false).withIconcolor(ContextCompat.getcolor(applicationContext, R.color.icon_grey)).withTextcolor(ContextCompat.getcolor(applicationContext, R.color.stroke)), PrimaryDrawerItem().withname(R.string.drawer_item_my_groups).withIcon(FontAwesome.Icon.faw_users).withIDentifIEr(4).withSelectable(false).withIconcolor(ContextCompat.getcolor(applicationContext, R.color.icon_grey)).withTextcolor(ContextCompat.getcolor(applicationContext, R.color.stroke)), PrimaryDrawerItem().withname(R.string.drawer_item_settings).withIcon(FontAwesome.Icon.faw_cog).withIDentifIEr(5).withSelectable(false).withIconcolor(ContextCompat.getcolor(applicationContext, R.color.icon_grey)).withTextcolor(ContextCompat.getcolor(applicationContext, R.color.stroke)) ) .withOnDrawerItemClickListener { vIEw, position, drawerItem -> if (drawerItem != null) { var intent: Intent? = null if (drawerItem.IDentifIEr == (1) { intent = Intent(this, UserProfileActivity::class.java) } else if (drawerItem.IDentifIEr == 2) { intent = Intent(this, YeetActivity::class.java) } else if (drawerItem.IDentifIEr == 3) { intent = Intent(this, RSSActivity::class.java) } else if (drawerItem.IDentifIEr == 4) { intent = Intent(this, GroupsActivity::class.java) } else if (drawerItem.IDentifIEr == 5) { intent = Intent(this, UserSettingsActivity::class.java) } if (intent != null) { this.startActivity(intent) } } false } .withSavedInstance(savedInstanceState) .withShowDrawerOnFirstLaunch(true) .build() RecyclerVIEwCacheUtil<IDrawerItem<*, *>>().withCacheSize(2).apply(result!!.recyclerVIEw, result!!.drawerItems) if (savedInstanceState == null) { result!!.setSelection(21, false) headerResult!!.activeProfile = profile } }错误:
如果(drawerItem.IDentifIEr ==(1)
如果(drawerItem.IDentifIEr == 2)
运算符==不能应用于’Long and”Int’
@R_419_6120@:
只需在右侧长时间使用
if (drawerItem.IDentifIEr == 1L)编辑:之所以需要这样做,是因为Kotlin不会将Ints提升为Longs(或更普遍的是,不会扩展类型);左边是Long,右边是Int,这会导致错误.明确指出右侧是Long可以修复错误.
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