从手机顶部划入，短暂停留后，再从顶部划出。
首先需要明确的是：
1、这个弹窗的弹出逻辑不一定是当前界面编写的，比如用户上传文件，用户可能继续浏览其他页面的内容，但是监听文件是否上传完成还是在原来的Activity,但是Dialog的弹出是需要当前页面的上下文Context的。
2、Dialog弹窗必须支持手势,用户在Dialog上向上滑时,Dialog需要退出,点击时可能需要处理点击事件。
一、Dialog的编写
/**
* 通知的自定义Dialog
*/
class NotificationDialog(context: Context, var title: String, var content: String) :
Dialog(context, R.style.dialog_notifacation_top) {
private var mListener: OnNotificationClick? = null
private var mStartY: Float = 0F
private var mView: View? = null
private var mHeight: Int? = 0
init {
mView = LayoutInflater.from(context).inflate(R.layout.common_layout_notifacation, null)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(mView!!)
window?.setGravity(Gravity.TOP)
val layoutParams = window?.attributes
layoutParams?.width = ViewGroup.LayoutParams.MATCH_PARENT
layoutParams?.height = ViewGroup.LayoutParams.WRAP_CONTENT
layoutParams?.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
window?.attributes = layoutParams
window?.setWindowAnimations(R.style.dialog_animation)
//按空白处不能取消
setCanceledOnTouchOutside(false)
//初始化界面数据
initData()
}
private fun initData() {
val tvTitle = findViewById(R.id.tv_title)
val tvContent = findViewById(R.id.tv_content)
if (title.isNotEmpty()) {
tvTitle.text = title
}
if (content.isNotEmpty()) {
tvContent.text = content
}
}
override fun onTouchEvent(event: MotionEvent): Boolean {
when (event.action) {
MotionEvent.ACTION_DOWN -> {
if (isOutOfBounds(event)) {
mStartY = event.y
}
}
MotionEvent.ACTION_UP -> {
if (mStartY > 0 && isOutOfBounds(event)) {
val moveY = event.y
if (abs(mStartY - moveY) >= 20) { //滑动超过20认定为滑动事件
//Dialog消失
} else { //认定为点击事件
//Dialog的点击事件
mListener?.onClick()
}
dismiss()
}
}
}
return false
}
/**
* 点击是否在范围外
*/
private fun isOutOfBounds(event: MotionEvent): Boolean {
val yValue = event.y
if (yValue > 0 && yValue <= (mHeight ?: (0 + 40))) {
return true
}
return false
}
private fun setDialogSize() {
mView?.addOnLayoutChangeListener { v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
mHeight = v?.height
}
}
/**
* 显示Dialog但是不会自动退出
*/
fun showDialog() {
if (!isShowing) {
show()
setDialogSize()
}
}
/**
* 显示Dialog,3000毫秒后自动退出
*/
fun showDialogAutoDismiss() {
if (!isShowing) {
show()
setDialogSize()
//延迟3000毫秒后自动消失
Handler(Looper.getMainLooper()).postDelayed({
if (isShowing) {
dismiss()
}
}, 3000L)
}
}
//处理通知的点击事件
fun setOnNotificationClickListener(listener: OnNotificationClick) {
mListener = listener
}
interface OnNotificationClick {
fun onClick()
}
}
Dialog的主题
Dialog的动画
Dialog的布局，CardView包裹一下就有立体阴影的效果
二、获取当前显示的Activity的弱引用
/**
* 前台Activity管理类
*/
class ForegroundActivityManager {
private var currentActivityWeakRef: WeakReference? = null
companion object {
val TAG = "ForegroundActivityManager"
private val instance = ForegroundActivityManager()
@JvmStatic
fun getInstance(): ForegroundActivityManager {
return instance
}
}
fun getCurrentActivity(): Activity? {
var currentActivity: Activity? = null
if (currentActivityWeakRef != null) {
currentActivity = currentActivityWeakRef?.get()
}
return currentActivity
}
fun setCurrentActivity(activity: Activity) {
currentActivityWeakRef = WeakReference(activity)
}
}
监听所有Activity的生命周期
class AppLifecycleCallback:Application.ActivityLifecycleCallbacks {
companion object{
val TAG = "AppLifecycleCallback"
}
override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
//获取Activity弱引用
ForegroundActivityManager.getInstance().setCurrentActivity(activity)
}
override fun onActivityStarted(activity: Activity) {
}
override fun onActivityResumed(activity: Activity) {
//获取Activity弱引用
ForegroundActivityManager.getInstance().setCurrentActivity(activity)
}
override fun onActivityPaused(activity: Activity) {
}
override fun onActivityStopped(activity: Activity) {
}
override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
}
override fun onActivityDestroyed(activity: Activity) {
}
}
在Application中注册
//注册Activity生命周期
registerActivityLifecycleCallbacks(AppLifecycleCallback())
三、封装和使用
/**
* 通知的管理类
* example:
* //发系统通知
* NotificationControlManager.getInstance()?.notify("文件上传完成", "文件上传完成,请点击查看详情")
* //发应用内通知
* NotificationControlManager.getInstance()?.showNotificationDialog("文件上传完成","文件上传完成,请点击查看详情",
* object : NotificationControlManager.OnNotificationCallback {
* override fun onCallback() {
* Toast.makeText(this@MainActivity, "被点击了", Toast.LENGTH_SHORT).show()
* }
* })
*/
class NotificationControlManager {
private var autoIncreament = AtomicInteger(1001)
private var dialog: NotificationDialog? = null
companion object {
const val channelId = "aaaaa"
const val description = "描述信息"
@Volatile
private var sInstance: NotificationControlManager? = null
@JvmStatic
fun getInstance(): NotificationControlManager? {
if (sInstance == null) {
synchronized(NotificationControlManager::class.java) {
if (sInstance == null) {
sInstance = NotificationControlManager()
}
}
}
return sInstance
}
}
/**
* 是否打开通知
*/
fun isOpenNotification(): Boolean {
val notificationManager: NotificationManagerCompat =
NotificationManagerCompat.from(
ForegroundActivityManager.getInstance().getCurrentActivity()!!
)
return notificationManager.areNotificationsEnabled()
}
/**
* 跳转到系统设置页面去打开通知，注意在这之前应该有个Dialog提醒用户
*/
fun openNotificationInSys() {
val context = ForegroundActivityManager.getInstance().getCurrentActivity()!!
val intent: Intent = Intent()
try {
intent.action = Settings.ACTION_APP_NOTIFICATION_SETTINGS
//8.0及以后版本使用这两个extra. >=API 26
intent.putExtra(Settings.EXTRA_APP_PACKAGE, context.packageName)
intent.putExtra(Settings.EXTRA_CHANNEL_ID, context.applicationInfo.uid)
//5.0-7.1 使用这两个extra. <= API 25, >=API 21
intent.putExtra("app_package", context.packageName)
intent.putExtra("app_uid", context.applicationInfo.uid)
context.startActivity(intent)
} catch (e: Exception) {
e.printStackTrace()
//其他低版本或者异常情况，走该节点。进入APP设置界面
intent.action = Settings.ACTION_APPLICATION_DETAILS_SETTINGS
intent.putExtra("package", context.packageName)
//val uri = Uri.fromParts("package", packageName, null)
//intent.data = uri
context.startActivity(intent)
}
}
/**
* 发通知
* @param title 标题
* @param content 内容
* @param cls 通知点击后跳转的Activity,默认为null跳转到MainActivity
*/
fun notify(title: String, content: String, cls: Class<*>) {
val context = ForegroundActivityManager.getInstance().getCurrentActivity()!!
val notificationManager =
context.getSystemService(AppCompatActivity.NOTIFICATION_SERVICE) as NotificationManager
val builder: Notification.Builder
val intent = Intent(context, cls)
val pendingIntent: PendingIntent? = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_IMMUTABLE)
} else {
PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_ONE_SHOT)
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val notificationChannel =
NotificationChannel(channelId, description, NotificationManager.IMPORTANCE_HIGH)
notificationChannel.enableLights(true);
notificationChannel.lightColor = Color.RED;
notificationChannel.enableVibration(true);
notificationChannel.vibrationPattern =
longArrayOf(100, 200, 300, 400, 500, 400, 300, 200, 400)
notificationManager.createNotificationChannel(notificationChannel)
builder = Notification.Builder(context, channelId)
.setSmallIcon(R.drawable.jpush_notification_icon)
.setContentIntent(pendingIntent)
.setContentTitle(title)
.setContentText(content)
} else {
builder = Notification.Builder(context)
.setSmallIcon(R.drawable.jpush_notification_icon)
.setLargeIcon(
BitmapFactory.decodeResource(
context.resources,
R.drawable.jpush_notification_icon
)
)
.setContentIntent(pendingIntent)
.setContentTitle(title)
.setContentText(content)
}
notificationManager.notify(autoIncreament.incrementAndGet(), builder.build())
}
/**
* 显示应用内通知的Dialog,需要自己处理点击事件。listener默认为null,不处理也可以。dialog会在3000毫秒后自动消失
* @param title 标题
* @param content 内容
* @param listener 点击的回调
*/
fun showNotificationDialog(
title: String,
content: String,
listener: OnNotificationCallback? = null
) {
val activity = ForegroundActivityManager.getInstance().getCurrentActivity()!!
dialog = NotificationDialog(activity, title, content)
if (Thread.currentThread() != Looper.getMainLooper().thread) { //子线程
activity.runOnUiThread {
showDialog(dialog, listener)
}
} else {
showDialog(dialog, listener)
}
}
/**
* show dialog
*/
private fun showDialog(
dialog: NotificationDialog?,
listener: OnNotificationCallback?
) {
dialog?.showDialogAutoDismiss()
if (listener != null) {
dialog?.setOnNotificationClickListener(object :
NotificationDialog.OnNotificationClick {
override fun onClick() = listener.onCallback()
})
}
}
/**
* dismiss Dialog
*/
fun dismissDialog() {
if (dialog != null && dialog!!.isShowing) {
dialog!!.dismiss()
}
}
interface OnNotificationCallback {
fun onCallback()
}
}
另外需要注意的点是,因为dialog是延迟关闭的,可能用户立刻退出Activity,导致延迟时间到时dialog退出时报错,解决办法可以在BaseActivity的onDestroy方法中尝试关闭Dialog：
override fun onDestroy() {
super.onDestroy()
NotificationControlManager.getInstance()?.dismissDialog()
}
来自：https://juejin.cn/post/7119049874175164453