BlocksActivity: 添加fab出入动画

Author: ztc1997

app/src/main/kotlin/com/rayfantasy/icode/extension/_FloatingActionButton.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2016 Alex Zhang aka. ztc1997
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.rayfantasy.icode.extension
+
+import android.support.design.widget.FloatingActionButton
+import android.view.animation.DecelerateInterpolator
+
+fun FloatingActionButton.toggle(visible: Boolean, duration: Long) {
+    val translationY = (if (visible) 0 else height + getMarginBottom()).toFloat()
+    if (duration != 0L)
+        animate()
+                .translationY(translationY)
+                .setDuration(duration)
+                .setInterpolator(DecelerateInterpolator())
+                .start()
+    else
+        setTranslationY(translationY)
+}

app/src/main/kotlin/com/rayfantasy/icode/extension/_View.kt

@@ -2,6 +2,16 @@ package com.rayfantasy.icode.extension
 
 import android.support.design.widget.Snackbar
 import android.view.View
+import android.view.ViewGroup
 
 public fun View.snackBar(resId: Int, duration: Int = Snackbar.LENGTH_SHORT) = Snackbar.make(this, resId, duration).show()
 public fun View.snackBar(text: CharSequence, duration: Int = Snackbar.LENGTH_SHORT) = Snackbar.make(this, text, duration).show()
+
+fun View.getMarginBottom(): Int {
+    var marginBottom = 0
+    val layoutParams = layoutParams
+    if (layoutParams is ViewGroup.MarginLayoutParams) {
+        marginBottom = layoutParams.bottomMargin;
+    }
+    return marginBottom
+}

app/src/main/kotlin/com/rayfantasy/icode/ui/activity/BlocksActivity.kt

@@ -12,6 +12,7 @@ import com.balysv.materialmenu.MaterialMenuDrawable
 import com.h6ah4i.android.widget.advrecyclerview.animator.RefactoredDefaultItemAnimator
 import com.rayfantasy.icode.R
 import com.rayfantasy.icode.databinding.ActivityBlocksBinding
+import com.rayfantasy.icode.extension.toggle
 import com.rayfantasy.icode.extra.PreloadLinearLayoutManager
 import com.rayfantasy.icode.model.ICodeTheme
 import com.rayfantasy.icode.postutil.PostUtil
@@ -72,7 +73,7 @@ class BlocksActivity : ActivityBindingStatus() {
             toast("rc = $rc")
             t.printStackTrace()
         })
-        block_fab.onClick { startActivity<ReplyActivity>("id" to codeGood.id) }
+        fab.onClick { startActivity<ReplyActivity>("id" to codeGood.id) }
 
         toolbar.navigationIcon = menuDrawable
         if (intent.hasExtra("y") && intent.hasExtra("height")) {
@@ -81,6 +82,14 @@ class BlocksActivity : ActivityBindingStatus() {
                 menuDrawable.animateIconState(MaterialMenuDrawable.IconState.ARROW)
             } else {
                 menuDrawable.iconState = MaterialMenuDrawable.IconState.ARROW
+                with(fab) {
+                    alpha = 0f
+                    post {
+                        toggle(false, 0)
+                        alpha = 1f
+                        toggle(true, TRANSFORM_DURATION_BG)
+                    }
+                }
             }
             recyclerView.alpha = 0f
             recyclerView.post {
@@ -109,6 +118,8 @@ class BlocksActivity : ActivityBindingStatus() {
         if (intent.hasExtra("y") && intent.hasExtra("height")) {
             if (intent.getBooleanExtra("arrowAnim", true)) {
                 menuDrawable.animateIconState(MaterialMenuDrawable.IconState.BURGER)
+            } else {
+                fab.toggle(false, TRANSFORM_DURATION_BG)
             }
             recyclerView.adapter = null
             recyclerView.animate()

app/src/main/res/layout/activity_blocks.xml

@@ -33,7 +33,7 @@
         <include layout="@layout/content_blocks"/>
 
         <android.support.design.widget.FloatingActionButton
-                android:id="@+id/block_fab"
+                android:id="@+id/fab"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="bottom|end"