Custom animations

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
-    ext.KOTLIN_VERSION = '1.3.21'
-    ext.ANDROID_GRADLE_PLUGIN_VERSION = '4.1.0'
+    ext.KOTLIN_VERSION = '1.4.31'
+    ext.ANDROID_GRADLE_PLUGIN_VERSION = '4.1.3'
     ext.DOKKA_VERSION = '0.9.18'
     ext.BINTRAY_VERSION = '1.8.4'
     ext.KORDAMP_VERSION = '0.15.1'
@@ -43,7 +43,7 @@ configure(allprojects) {
         ANDROIDX_RECYCLERVIEW_VERSION       = '1.0.0'
 
         ANDROIDX_CONSTRAINTLAYOUT_VERSION   = '1.1.3'
-        ANDROIDX_CORE_KTX_VERSION           = '1.1.0'
+        ANDROIDX_CORE_KTX_VERSION           = '1.3.2'
         MATERIAL_COMPONENTS_VERSION         = '1.2.1'
 
         JUNIT_VERSION                       = '4.13.1'

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-all.zip

material-popup-menu/material-popup-menu.gradle

@@ -19,13 +19,24 @@ android {
             minifyEnabled false
         }
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 }
 
 dependencies {
     api "androidx.appcompat:appcompat:$ANDROIDX_APPCOMPAT_VERSION"
     api "androidx.recyclerview:recyclerview:$ANDROIDX_RECYCLERVIEW_VERSION"
 
-    api "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$KOTLIN_VERSION"
+    implementation "androidx.core:core-ktx:$ANDROIDX_CORE_KTX_VERSION"
+
+    api "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$KOTLIN_VERSION"
 
     testImplementation "junit:junit:$JUNIT_VERSION"
     testImplementation "org.hamcrest:hamcrest-core:$HAMCREST_VERSION"

material-popup-menu/src/main/java/androidx/appcompat/widget/AppCompatPopupWindowFactory.kt

@@ -1,6 +1,6 @@
 package androidx.appcompat.widget
 
 import android.content.Context
-import android.widget.PopupWindow
+import com.github.zawadz88.materialpopupmenu.PopupAnimation
 
-internal fun createAppCompatPopupWindow(context: Context): PopupWindow = AppCompatPopupWindow(context, null, 0)
+internal fun createAppCompatPopupWindow(context: Context, customAnimation: PopupAnimation?) = MaterialPopupWindow(context, customAnimation)

material-popup-menu/src/main/java/androidx/appcompat/widget/MaterialPopupWindow.kt

@@ -0,0 +1,91 @@
+package androidx.appcompat.widget
+
+import android.content.Context
+import android.os.Build
+import android.util.Log
+import android.view.View
+import android.view.WindowManager
+import android.widget.PopupWindow
+import androidx.core.view.doOnLayout
+import com.github.zawadz88.materialpopupmenu.PopupAnimation
+
+internal class MaterialPopupWindow(
+        context: Context,
+        private val customAnimation: PopupAnimation?
+) : AppCompatPopupWindow(context, null, 0) {
+
+    override fun showAsDropDown(anchor: View?) {
+        prepareAnimation()
+        super.showAsDropDown(anchor)
+        startAnimation()
+    }
+
+    override fun showAsDropDown(anchor: View?, xoff: Int, yoff: Int) {
+        prepareAnimation()
+        super.showAsDropDown(anchor, xoff, yoff)
+        startAnimation()
+    }
+
+    override fun showAsDropDown(anchor: View?, xoff: Int, yoff: Int, gravity: Int) {
+        prepareAnimation()
+        super.showAsDropDown(anchor, xoff, yoff, gravity)
+        startAnimation()
+    }
+
+    override fun dismiss() {
+        customAnimation?.let {
+            it.onHide(this) {
+                super.dismiss()
+                contentView = null
+            }
+        } ?: run {
+            super.dismiss()
+            contentView = null
+        }
+    }
+
+    private fun prepareAnimation() {
+        customAnimation?.onPrepare(this)
+        if (customAnimation != null) {
+            disableAnimations()
+        }
+    }
+
+    private fun startAnimation() {
+        customAnimation?.let { anim ->
+            disableAnimations()
+            anim.onPrepare(this)
+            contentView?.doOnLayout {
+                anim.onShow(this)
+            }
+        }
+    }
+
+    private fun disableAnimations() {
+        animationStyle = 0
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            enterTransition = null
+            exitTransition = null
+        } else {
+            try {
+                val field1 = PopupWindow::class.java.getDeclaredField("mPopupView")
+                field1.isAccessible = true
+                val popupView = field1.get(this) as View
+                val p = popupView.layoutParams as WindowManager.LayoutParams
+                p.windowAnimations = 0
+
+                val field2 = WindowManager.LayoutParams::class.java.getDeclaredField("privateFlags")
+                field2.isAccessible = true
+                var flag = field2.getInt(p)
+                flag = flag or 0x00000040
+                field2.set(p, flag)
+
+            } catch (e: NoSuchFieldException) {
+                Log.e("WINDOW_PARAMS", "Could not disable window animations.", e)
+            } catch (e: IllegalAccessException) {
+                Log.e("WINDOW_PARAMS", "Could not disable window animations.", e)
+            }
+        }
+    }
+}

material-popup-menu/src/main/java/com/github/zawadz88/materialpopupmenu/MaterialPopupMenu.kt

@@ -29,7 +29,8 @@ internal constructor(
     internal val sections: List<PopupMenuSection>,
     internal val fixedContentWidthInPx: Int,
     internal val dropDownVerticalOffset: Int?,
-    internal val dropDownHorizontalOffset: Int?
+    internal val dropDownHorizontalOffset: Int?,
+    internal val customAnimation: PopupAnimation?
 ) {
 
     private var popupWindow: MaterialRecyclerViewPopupWindow? = null
@@ -52,7 +53,8 @@ internal constructor(
             dropDownGravity = dropdownGravity,
             fixedContentWidthInPx = fixedContentWidthInPx,
             dropDownVerticalOffset = dropDownVerticalOffset,
-            dropDownHorizontalOffset = dropDownHorizontalOffset
+            dropDownHorizontalOffset = dropDownHorizontalOffset,
+            customAnimation = customAnimation
         )
         val adapter = PopupMenuAdapter(sections) { popupWindow.dismiss() }
 

material-popup-menu/src/main/java/com/github/zawadz88/materialpopupmenu/MaterialPopupMenuBuilder.kt

@@ -56,6 +56,11 @@ class MaterialPopupMenuBuilder {
      */
     var dropDownHorizontalOffset: Int? = null
 
+    /**
+     * Set up a custom animation
+     */
+    var customAnimation: PopupAnimation? = null
+
     private val sectionHolderList = arrayListOf<SectionHolder>()
 
     /**
@@ -88,7 +93,8 @@ class MaterialPopupMenuBuilder {
             sections = sections,
             fixedContentWidthInPx = fixedContentWidthInPx,
             dropDownVerticalOffset = dropDownVerticalOffset,
-            dropDownHorizontalOffset = dropDownHorizontalOffset
+            dropDownHorizontalOffset = dropDownHorizontalOffset,
+            customAnimation = customAnimation
         )
     }
 

material-popup-menu/src/main/java/com/github/zawadz88/materialpopupmenu/PopupAnimation.kt

@@ -0,0 +1,18 @@
+package com.github.zawadz88.materialpopupmenu
+
+import android.view.View
+import android.widget.PopupWindow
+
+interface PopupAnimation {
+
+    /* view is not yet layed out */
+    fun onPrepare(popup: PopupWindow) {
+        popup.contentView.visibility = View.INVISIBLE
+    }
+
+    /* view is layed out - animate it */
+    fun onShow(popup: PopupWindow)
+
+    /* animate the view dismissal */
+    fun onHide(popup: PopupWindow, onHidden: (() -> Unit))
+}

material-popup-menu/src/main/java/com/github/zawadz88/materialpopupmenu/internal/MaterialRecyclerViewPopupWindow.kt

@@ -11,10 +11,12 @@ import android.view.ViewGroup
 import android.view.WindowManager
 import android.widget.FrameLayout
 import android.widget.PopupWindow
+import androidx.appcompat.widget.MaterialPopupWindow
 import androidx.appcompat.widget.createAppCompatPopupWindow
 import androidx.core.widget.PopupWindowCompat
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import com.github.zawadz88.materialpopupmenu.PopupAnimation
 import com.github.zawadz88.materialpopupmenu.R
 import java.lang.reflect.Method
 
@@ -32,7 +34,8 @@ internal class MaterialRecyclerViewPopupWindow(
         private var dropDownGravity: Int,
         private val fixedContentWidthInPx: Int,
         dropDownVerticalOffset: Int?,
-        dropDownHorizontalOffset: Int?
+        dropDownHorizontalOffset: Int?,
+        private val customAnimation: PopupAnimation?
 ) {
 
     @SuppressLint("DiscouragedPrivateApi")
@@ -91,7 +94,7 @@ internal class MaterialRecyclerViewPopupWindow(
 
     private val tempRect = Rect()
 
-    private val popup: PopupWindow
+    private val popup: MaterialPopupWindow
 
     private val popupMaxWidth: Int
 
@@ -116,7 +119,7 @@ internal class MaterialRecyclerViewPopupWindow(
     private val popupPaddingTop: Int
 
     init {
-        popup = createAppCompatPopupWindow(context)
+        popup = createAppCompatPopupWindow(context, customAnimation)
         popup.inputMethodMode = PopupWindow.INPUT_METHOD_NEEDED
         popup.isFocusable = true
 
@@ -212,7 +215,6 @@ internal class MaterialRecyclerViewPopupWindow(
      */
     internal fun dismiss() {
         popup.dismiss()
-        popup.contentView = null
     }
 
     /**

sample/sample.gradle

@@ -31,6 +31,10 @@ android {
         targetCompatibility 1.8
     }
 
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
     buildTypes {
         release {
             minifyEnabled false