我试图在伴随对象中初始化一个imageView,因为我希望方法是静态的,但是我有一个错误,下面是否有其他方法是我的代码
companion object {
lateinit var bufferingAnimation : LoadingAnimation
var bufferingIndicator = findViewById(R.id.loading)
fun startBufferingAnimation() {
bufferingAnimation = LoadingAnimation(bufferingIndicator)
bufferingAnimation.startAnimation()
}
fun stopBufferingAnimation() {
bufferingAnimation.clearAnimation()
}
}
我无法初始化BufferingIndicator,是否有其他方法?
不建议进行静态视图,因为它可能会导致内存泄漏,但是如果仍然需要静态视图,则可以尝试以下操作: -
companion object {
lateinit var imageView: ImageView
}
override fun onCreate(savedInstanceState: Bundle?) {
imageView =findViewById<ImageView>(R.id.imageView)
}
如果要在运行时 initialise image view
: -
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_image_view_example)
val constraintLayout = findViewById(R.id.constraintLayout) as ConstraintLayout
val imageView = ImageView(this)
imageView.setImageResource(R.drawable.android_logo)
constraintLayout.addView(imageView)
}
如果您在XML中有image view
: -
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// get reference to ImageView
val imageView = findViewById(R.id.iv_click_me) as ImageView
}