安卓 - 如何用正确的姿势监听 Android 屏幕旋转，flutter 修改 textfield 内容
val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as
WindowManager
val rotation = windowManager.defaultDisplay?.rotation
//rotation 为常量 0、1、2、3，分别表示屏幕的四个?向
通过这样的判断基本上能将屏幕旋转事件监听准确了，onOrientationChanged 这个回调很灵敏，? 机屏幕稍微动?下就会回调。那我希望模拟正常的屏幕旋转事件来修改悬浮球的位置，总不能很频繁 的刷新吧。这?做?下控制就好，全部代码如下：
object ScreenOrientationHelper {
val ORIENTATION_TYPE_0 = 0
val ORIENTATION_TYPE_90 = 90
val ORIENTATION_TYPE_180 = 180
val ORIENTATION_TYPE_270 = 270
private var mOrientationEventListener: OrientationEventListener? = null
private var mScreenOrientationChangeListener:
ScreenOrientationChangeListener? = null
private var currentType = ORIENTATION_TYPE_0
fun init(context: Context, listener: ScreenOrientationChangeListener) {
mScreenOrientationChangeListener = listener
mOrientationEventListener = object :
OrientationEventListener(context) {
override fun onOrientationChanged(orientation: Int) {
if (mScreenOrientationChangeListener == null) {
return
}
if (orientation > 340 || orientation < 20) {
//0
if (currentType == 0) {
return
}
if (getScreenRotation(context) == Surface.ROTATION_0) {
mScreenOrientationChangeListener!!.onChange(ORIENTATION_TYPE_0)
currentType = ORIENTATION_TYPE_0
}
} else if (orientation in 71..109) {
//90
if (currentType == 90) {
return
}
val angle = getScreenRotation(context)
if (angle == Surface.ROTATION_270) {
mScreenOrientationChangeListener!!.onChange(ORIENTATION_TYPE_90)
currentType = ORIENTATION_TYPE_90
}
} else if (orientation in 161..199) {
//180
if (currentType == 180) {
return
}
val angle = getSc
reenRotation(context)
if (angle == Surface.ROTATION_180) {
mScreenOrientationChangeListener!!.onChange(ORIENTATION_TYPE_180)
currentType = ORIENTATION_TYPE_180
}
} else if (orientation in 251..289) {
//270
if (currentType == 270) {
return
}
val angle = getScreenRotation(context)
if (angle == Surface.ROTATION_90) {
mScreenOrientationChangeListener!!.onChange(ORIENTATION_TYPE_270)
currentType = ORIENTATION_TYPE_270
}
}
}
}
register()
}
private fun getScreenRotation(context: Context): Int {
val windowManager =
context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
return windowManager.defaultDisplay?.rotation ?: 0
}
fun register() {
if (mOrientationEventListener != null) {
mOrientationEventListener!!.enable()
}
}
fun unRegister() {
if (mOrientationEventListener != null) {
mOrientationEventListener!!.disable()
}
}
interface ScreenOrientationChangeListener {
/**
@param orientation
*/
fun onChange(orientation: Int)
}
}
使?的话，直接这样：
ScreenOrientationHelper.init(this, object :
ScreenOrientationHelper.ScreenOrientationChangeListener {
override fun onChange(orientation: Int) {
when(orientation) {
ScreenOrientationHelper.ORIENTATION_TYPE_0 -> {}
ScreenOrientationHelper.ORIENTATION_TYPE_90 -> {}
ScreenOrientationHelper.ORIENTATION_TYPE_180 -> {}
ScreenOrientationHelper.ORIENTATION_TYPE_270 -> {}
}
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