<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:gravity="center"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="40dp"
        android:layout_marginEnd="40dp"
        android:background="@color/design_default_color_primary_dark"
        android:gravity="center"
        android:text="這是一個(gè)textview"
        android:textColor="@color/white"
        android:textSize="18sp"
        android:visibility="visible"
        tools:text="這是一個(gè)textview" />
</LinearLayout>

   private fun initView() {
       //使用協(xié)程方式刷新
         uiScope.launch {
             binding.textview.text = "這是view使用協(xié)程刷新"
         }
   }

    private fun initView() {
          //使用view.post刷新
          binding.textview.post {
              binding.textview.text = "這是view使用post刷新"
              Log.d(TAG,"view的內(nèi)容${binding.textview.text} ${binding.textview.visibility}")
          }
    }

private fun initView() {
      //使用view.viewTreeObserver刷新
      binding.textview.viewTreeObserver.addOnGlobalLayoutListener {
          binding.textview.text = "這是view使用viewTreeObserver刷新"
      }
}

binding.textview.doOnLayout {
    // 當(dāng)布局確定后執(zhí)行的代碼
    binding.textview.text = "這是view使用doOnLayout刷新"
}

package com.cloud.viewpostdemo
import android.animation.ObjectAnimator
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.util.Log
import android.view.View
import android.widget.LinearLayout
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.doOnLayout
import com.cloud.viewpostdemo.databinding.ActivityMainBinding
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.launch
class MainActivity : AppCompatActivity() {
    private val mainJob = SupervisorJob()
    private val uiScope = CoroutineScope(Dispatchers.Main + mainJob)
    private lateinit var binding: ActivityMainBinding
    private val TAG by lazy {
        "${javaClass.simpleName}@${System.identityHashCode(this)}"
    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)
        initView()
    }
    private fun initView() {
        //使用協(xié)程方式刷新
          uiScope.launch {
              binding.textview.text = "這是view使用協(xié)程刷新"
          }
        binding.textview.visibility = View.GONE
          //使用view.post刷新
          binding.textview.post {
              binding.textview.text = "這是view使用post刷新"
              Log.d(TAG,"view的內(nèi)容${binding.textview.text} ${binding.textview.visibility}")
          }
          //使用handler.post刷新
          val handler = Handler(Looper.getMainLooper())
          handler.post {
              binding.textview.text = "這是view使用handler刷新"
          }
          //使用view.viewTreeObserver刷新
          binding.textview.viewTreeObserver.addOnGlobalLayoutListener {
              binding.textview.text = "這是view使用viewTreeObserver刷新"
          }
        binding.textview.doOnLayout {
            // 當(dāng)布局確定后執(zhí)行的代碼
            binding.textview.text = "這是view使用doOnLayout刷新"
        }
    }
}