增加浮窗大小改变时，浮窗的对齐方式 & 增加当token为null时，兼容显示

easyfloat/src/main/java/com/lzf/easyfloat/EasyFloat.kt

@@ -205,6 +205,16 @@ class EasyFloat {
             config.offsetPair = Pair(offsetX, offsetY)
         }
 
+        /**
+         * 当layout大小变化后，整体view的位置的对齐方式
+         * 比如，当设置为 Gravity.END 时，当view的宽度变小或者变大时，都将会以原有的右边对齐 <br/>
+         * 默认对齐方式为左上角
+         * @param gravity 对齐方式
+         */
+        fun setLayoutChangedGravity(gravity: Int) = apply {
+            config.layoutChangedGravity = gravity;
+        }
+
         /**
          * 设置浮窗的起始坐标，优先级高于setGravity
          * @param x 起始水平坐标

easyfloat/src/main/java/com/lzf/easyfloat/core/FloatingWindowHelper.kt

@@ -9,6 +9,7 @@ import android.graphics.PixelFormat
 import android.graphics.Rect
 import android.os.Build
 import android.os.IBinder
+import android.util.Log
 import android.view.*
 import android.view.WindowManager.LayoutParams.*
 import android.widget.EditText
@@ -34,15 +35,30 @@ internal class FloatingWindowHelper(val context: Context, var config: FloatConfi
     var frameLayout: ParentFrameLayout? = null
     private lateinit var touchUtils: TouchUtils
     private var enterAnimator: Animator? = null
+    var lastLayoutMeasureWidth = -1
+    var lastLayoutMeasureHeight = -1;
 
-    fun createWindow() = try {
+    fun createWindow() {
         touchUtils = TouchUtils(context, config)
-        initParams()
-        addView()
-        config.isShow = true
-    } catch (e: Exception) {
-        config.callbacks?.createdResult(false, "$e", null)
-        config.floatCallbacks?.builder?.createdResult?.invoke(false, "$e", null)
+        if (getToken() == null) {
+            val activity = if (context is Activity) context else LifecycleUtils.getTopActivity()
+            activity?.findViewById<View>(android.R.id.content)?.post {
+                createWindowInner()
+            }
+        } else {
+            createWindowInner()
+        }
+    }
+
+    private fun createWindowInner() {
+        try {
+            initParams()
+            addView()
+            config.isShow = true
+        } catch (e: Exception) {
+            config.callbacks?.createdResult(false, "$e", null)
+            config.floatCallbacks?.builder?.createdResult?.invoke(false, "$e", null)
+        }
     }
 
     private fun initParams() {
@@ -112,6 +128,8 @@ internal class FloatingWindowHelper(val context: Context, var config: FloatConfi
         frameLayout?.layoutListener = object : ParentFrameLayout.OnLayoutListener {
             override fun onLayout() {
                 setGravity(frameLayout)
+                lastLayoutMeasureWidth = frameLayout?.measuredWidth ?: -1
+                lastLayoutMeasureHeight = frameLayout?.measuredHeight ?: -1
                 config.apply {
                     // 如果设置了过滤当前页，或者后台显示前台创建、前台显示后台创建，隐藏浮窗，否则执行入场动画
                     if (filterSelf
@@ -130,6 +148,51 @@ internal class FloatingWindowHelper(val context: Context, var config: FloatConfi
                 }
             }
         }
+
+        // 监听frameLayout布局完成
+        frameLayout?.apply {
+            viewTreeObserver?.addOnGlobalLayoutListener {
+                val filterInvalidVal = lastLayoutMeasureWidth == -1 || lastLayoutMeasureHeight == -1
+                val filterEqualVal = lastLayoutMeasureWidth == this.measuredWidth && lastLayoutMeasureHeight == this.measuredHeight
+                if (filterInvalidVal || filterEqualVal) {
+                    return@addOnGlobalLayoutListener
+                }
+
+                // 水平方向
+                if (config.layoutChangedGravity.and(Gravity.START) == Gravity.START) {
+                    // ignore
+
+                } else if (config.layoutChangedGravity.and(Gravity.END) == Gravity.END) {
+                    val diffChangedSize = this.measuredWidth - lastLayoutMeasureWidth
+                    params.x = params.x - diffChangedSize
+
+                } else if (config.layoutChangedGravity.and(Gravity.CENTER_HORIZONTAL) == Gravity.CENTER_HORIZONTAL ||
+                        config.layoutChangedGravity.and(Gravity.CENTER) == Gravity.CENTER) {
+                    val diffChangedCenter = lastLayoutMeasureWidth / 2 - this.measuredWidth / 2
+                    params.x += diffChangedCenter
+                }
+
+                // 垂直方向
+                if (config.layoutChangedGravity.and(Gravity.TOP) == Gravity.TOP) {
+                    // ignore
+
+                } else if (config.layoutChangedGravity.and(Gravity.BOTTOM) == Gravity.BOTTOM) {
+                    val diffChangedSize = this.measuredHeight - lastLayoutMeasureHeight
+                    params.y = params.y - diffChangedSize
+
+                } else if (config.layoutChangedGravity.and(Gravity.CENTER_VERTICAL) == Gravity.CENTER_VERTICAL ||
+                        config.layoutChangedGravity.and(Gravity.CENTER) == Gravity.CENTER) {
+                    val diffChangedCenter = lastLayoutMeasureHeight / 2 - this.measuredHeight / 2
+                    params.y += diffChangedCenter
+                }
+
+                lastLayoutMeasureWidth = this.measuredWidth
+                lastLayoutMeasureHeight = this.measuredHeight
+
+                // 更新浮窗位置信息
+                windowManager.updateViewLayout(frameLayout, params)
+            }
+        }
     }
 
     private fun initEditText() {

easyfloat/src/main/java/com/lzf/easyfloat/data/FloatConfig.kt

@@ -1,5 +1,6 @@
 package com.lzf.easyfloat.data
 
+import android.view.Gravity
 import android.view.View
 import com.lzf.easyfloat.anim.DefaultAnimator
 import com.lzf.easyfloat.enums.ShowPattern
@@ -75,6 +76,8 @@ data class FloatConfig(
     // 是否设置，当前创建的页面也被过滤
     internal var filterSelf: Boolean = false,
     // 是否需要显示，当过滤信息匹配上时，该值为false（用户手动调用隐藏，该值也为false，相当于手动过滤）
-    internal var needShow: Boolean = true
+    internal var needShow: Boolean = true,
 
+    // 当layout大小变化后，整体view的位置的摆放
+    var layoutChangedGravity: Int = Gravity.TOP.or(Gravity.START)
 )

example/src/main/java/com/lzf/easyfloat/example/activity/MainActivity.kt

@@ -21,6 +21,7 @@ import com.lzf.easyfloat.permission.PermissionUtils
 import com.lzf.easyfloat.utils.DragUtils
 import com.lzf.easyfloat.widget.BaseSwitchView
 import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.android.synthetic.main.float_seekbar.*
 import kotlin.math.max
 
 
@@ -53,6 +54,9 @@ class MainActivity : BaseActivity(), View.OnClickListener {
         openSecond.setOnClickListener(this)
         openSwipeTest.setOnClickListener(this)
         openBorderTest.setOnClickListener(this)
+
+        // 测试activity中onCreate就启动浮框
+        // showActivity2()
     }
 
     override fun onClick(v: View?) {
@@ -157,7 +161,9 @@ class MainActivity : BaseActivity(), View.OnClickListener {
         EasyFloat.with(this)
             .setTag(tag)
             .setGravity(Gravity.CENTER)
+            .setLayoutChangedGravity(Gravity.END)
             .setLayout(R.layout.float_seekbar) {
+                val layoutContent = it.findViewById<View>(R.id.layoutContent);
                 it.findViewById<ImageView>(R.id.ivClose).setOnClickListener {
                     EasyFloat.dismiss(tag)
                 }
@@ -176,6 +182,10 @@ class MainActivity : BaseActivity(), View.OnClickListener {
 
                         override fun onStopTrackingTouch(seekBar: SeekBar?) {}
                     })
+                it.findViewById<TextView>(R.id.viewOther).setOnClickListener { otherView->
+                    if (layoutContent.visibility == View.VISIBLE) layoutContent.visibility = View.GONE
+                    else layoutContent.visibility = View.VISIBLE
+                }
             }
             .show()
     }

example/src/main/res/layout/float_seekbar.xml

@@ -1,11 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-        android:layout_width="150dp"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal">
+
+    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/layoutContent"
+        android:layout_width="90dp"
         android:layout_height="wrap_content"
         android:background="@color/translucent"
         android:orientation="vertical">
 
-    <TextView
+        <TextView
             android:id="@+id/tvProgress"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -15,15 +21,15 @@
             android:textColor="@color/pinkRed"
             android:textSize="20sp" />
 
-    <ImageView
+        <ImageView
             android:id="@+id/ivClose"
             android:layout_width="36dp"
             android:layout_height="36dp"
             android:layout_alignParentEnd="true"
             android:padding="10dp"
             android:src="@drawable/icon_x" />
 
-    <SeekBar
+        <SeekBar
             android:id="@+id/seekBar"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -33,4 +39,16 @@
             android:progress="20" />
 
 
-</RelativeLayout>
+    </RelativeLayout>
+
+
+    <TextView
+        android:id="@+id/viewOther"
+        android:layout_width="wrap_content"
+        android:text="简化模式"
+        android:gravity="center"
+        android:textColor="@color/white"
+        android:layout_height="55dp"
+        android:background="@color/translucent" />
+
+</LinearLayout>