沉浸式佈局下，EditText被輸入法擋住問題

項目中遇到的一個問題，

解放方法：https://blog.csdn.net/qq_34161388/article/details/89101442，感覺博主的實踐。

 

import android.R
import android.app.Activity
import android.graphics.Rect
import android.os.Build
import android.view.View
import android.view.inputmethod.InputMethodManager
import android.widget.FrameLayout


class SoftHideKeyBoardUtil(activity: Activity) {

    companion object {
        @JvmStatic
        fun assistActivity(activity: Activity) {
            SoftHideKeyBoardUtil(activity)
        }

        @JvmStatic
        fun hideKeyboard(act: Activity?) {
            if (act != null && act.currentFocus != null) {
                val inputMethodManager = act.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
                inputMethodManager.hideSoftInputFromWindow(act.currentFocus.windowToken, 0)
            }
        }
    }

    private var mContentView: View? = null
    private var mFrameLayoutParams: FrameLayout.LayoutParams? = null
    private var barStatusHeight = 0

    private var lastUsableHeight = 0 //上一次的可用高度


    init {
        barStatusHeight = statusBarHeight
        val decorView = activity.findViewById<FrameLayout>(R.id.content)
        mContentView = decorView.getChildAt(0)
        mFrameLayoutParams = mContentView?.layoutParams as? FrameLayout.LayoutParams
        mContentView?.viewTreeObserver?.addOnGlobalLayoutListener {
            val heightDecor = decorView.height
            val usableHeight = computeUsableHeight() //我們setContentView設置的view的可用高度
            if (usableHeight != lastUsableHeight) {
                lastUsableHeight = usableHeight //防止重複變動
                val heightDifference = heightDecor - usableHeight
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && activity.isInMultiWindowMode) { //如果是分屏模式
                    if (heightDifference > 0) { //分屏模式，只要變動了就人爲彈出鍵盤
                        setHeight(heightDecor - heightDifference) //這裏不能加狀態欄高度，因爲不知道應用是在上還是下
                    } else {
                        setHeight(FrameLayout.LayoutParams.MATCH_PARENT)
                    }
                } else {
                    if (heightDifference > heightDecor / 4) { //高度變動超過decor的四分之一則認爲是軟鍵盤彈出事件
                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                            setHeight(heightDecor - heightDifference + barStatusHeight) // 沉浸式要加上狀態欄高度
                        } else {
                            setHeight(heightDecor - heightDifference)
                        }
                    } else {
                        setHeight(FrameLayout.LayoutParams.MATCH_PARENT)
                    }
                }
            }
        }
    }

    private fun setHeight(height: Int) {
        if (mFrameLayoutParams?.height != height) { //不必要的更新就不要了
            mFrameLayoutParams?.height = height
            mContentView?.requestLayout() //觸發佈局更新
        }
    }

    private fun computeUsableHeight(): Int {
        val r = Rect()
        mContentView?.getWindowVisibleDisplayFrame(r)
        return r.bottom - r.top
    }
}