Created
November 16, 2017 07:04
-
-
Save JasonHezz/c073f04c84110361171146d109fa41a5 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package com.github.jasonhezz.likesplash.util | |
| import android.content.Context | |
| import android.graphics.Rect | |
| import android.os.Build | |
| import android.support.v4.view.ViewCompat | |
| import android.support.v4.view.WindowInsetsCompat | |
| import android.util.AttributeSet | |
| import android.view.Gravity | |
| import android.view.View | |
| import android.widget.FrameLayout | |
| /** | |
| * Created by JavaCoder on 2017/11/14. | |
| */ | |
| class WindowInsetsFrameLayout @JvmOverloads constructor(context: Context, | |
| attrs: AttributeSet? = null, | |
| defStyleAttr: Int = 0, | |
| defStyleRes: Int = 0) : FrameLayout(context, attrs, defStyleAttr, defStyleRes) { | |
| init { | |
| ViewCompat.setOnApplyWindowInsetsListener(this | |
| ) { v, insets -> setWindowInsets(insets) } | |
| } | |
| private fun setWindowInsets(insets: WindowInsetsCompat): WindowInsetsCompat { | |
| if (Build.VERSION.SDK_INT >= 21 && insets.hasSystemWindowInsets()) { | |
| if (applySystemWindowInsets21(insets)) { | |
| return insets.consumeSystemWindowInsets() | |
| } | |
| } | |
| return insets | |
| } | |
| override protected fun fitSystemWindows(insets: Rect): Boolean { | |
| return if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) { | |
| applySystemWindowInsets19(insets) | |
| } else super.fitSystemWindows(insets) | |
| } | |
| private fun applySystemWindowInsets19(insets: Rect): Boolean { | |
| var consumed = false | |
| for (i in 0 until childCount) { | |
| val child = getChildAt(i) | |
| if (!child.fitsSystemWindows) { | |
| continue | |
| } | |
| val childInsets = Rect(insets) | |
| computeInsetsWithGravity(child, childInsets) | |
| child.setPadding(childInsets.left, childInsets.top, childInsets.right, childInsets.bottom) | |
| consumed = true | |
| } | |
| return consumed | |
| } | |
| private fun applySystemWindowInsets21(insets: WindowInsetsCompat): Boolean { | |
| var consumed = false | |
| for (i in 0 until childCount) { | |
| val child = getChildAt(i) | |
| if (!child.fitsSystemWindows) { | |
| continue | |
| } | |
| val childInsets = Rect( | |
| insets.systemWindowInsetLeft, | |
| insets.systemWindowInsetTop, | |
| insets.systemWindowInsetRight, | |
| insets.systemWindowInsetBottom) | |
| computeInsetsWithGravity(child, childInsets) | |
| ViewCompat.dispatchApplyWindowInsets(child, insets.replaceSystemWindowInsets(childInsets)) | |
| consumed = true | |
| } | |
| return consumed | |
| } | |
| private fun computeInsetsWithGravity(view: View, insets: Rect) { | |
| val lp = view.getLayoutParams() as FrameLayout.LayoutParams | |
| var gravity = lp.gravity | |
| /** | |
| * 因为该方法执行时机早于 FrameLayout.layoutChildren， | |
| * 而在 {FrameLayout#layoutChildren} 中当 gravity == -1 时会设置默认值为 Gravity.TOP | Gravity.LEFT， | |
| * 所以这里也要同样设置 | |
| */ | |
| if (gravity == -1) { | |
| gravity = Gravity.TOP or Gravity.START | |
| } | |
| if (lp.width != FrameLayout.LayoutParams.MATCH_PARENT) { | |
| val horizontalGravity = gravity and Gravity.HORIZONTAL_GRAVITY_MASK | |
| when (horizontalGravity) { | |
| Gravity.START -> insets.right = 0 | |
| Gravity.END -> insets.left = 0 | |
| } | |
| } | |
| if (lp.height != FrameLayout.LayoutParams.MATCH_PARENT) { | |
| val verticalGravity = gravity and Gravity.VERTICAL_GRAVITY_MASK | |
| when (verticalGravity) { | |
| Gravity.TOP -> insets.bottom = 0 | |
| Gravity.BOTTOM -> insets.top = 0 | |
| } | |
| } | |
| } | |
| /*@TargetApi(Build.VERSION_CODES.KITKAT_WATCH) | |
| override fun onApplyWindowInsets(insets: WindowInsets): WindowInsets { | |
| val childCount = childCount | |
| for (index in 0 until childCount) | |
| getChildAt(index).dispatchApplyWindowInsets(insets) | |
| return insets | |
| }*/ | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment