Android 点击空白处退出软键盘

1 重写Activity dispatchTouchEvent 

 override fun dispatchTouchEvent(ev: MotionEvent): Boolean {
        if (ev.action == MotionEvent.ACTION_DOWN) {
            val view = currentFocus
            if (view is EditText) {
                val out = Rect()
                view.getGlobalVisibleRect(out)
                "dispatchTouchEvent ${ev.rawX.toInt()} ${ev.y.toInt()} ${!out.contains(ev.rawX.toInt(), ev.y.toInt())}".loge()
                if (!out.contains(ev.rawX.toInt(), ev.y.toInt())) {
                    view.clearFocus()
                    KeyboardUtils.hideKeyboard(this)
                }
            }
        }
        return super.dispatchTouchEvent(ev)
    }

2 调用退出软键盘

object KeyboardUtils {
    fun hideKeyboard(context: Activity) {
        val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        // 隐藏软键盘
        imm.hideSoftInputFromWindow(context.window.decorView.windowToken, 0)
    }
    fun showSoftInput(view: View, flags: Int) {
        val imm = view.context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager

        view.isFocusable = true
        view.isFocusableInTouchMode = true
        view.requestFocus()
        imm.showSoftInput(view, flags)
    }

}