Android切换主题生命周期流程与onSaveInstanceState和onRestoreInstanceState，Kotlin

比眉伴天荒 2024-03-27 18:48 8阅读 0赞

### Android切换主题生命周期流程与onSaveInstanceState和onRestoreInstanceState，Kotlin ###

import android.os.Bundle
    import android.util.Log
    import androidx.appcompat.app.AppCompatActivity
    
    class MainActivity : AppCompatActivity() {
        private val TAG = "fly"
        private val KEY = "my_key"
        private var mBundle: Bundle? = null
    
        override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            Log.d(TAG, "onCreate")
        }
    
        override fun onSaveInstanceState(outState: Bundle) {
            super.onSaveInstanceState(outState)
    
            val t = System.currentTimeMillis()
            outState.putString(KEY, t.toString())
            Log.d(TAG, "onSaveInstanceState ${t}")
        }
    
        override fun onRestoreInstanceState(savedInstanceState: Bundle) {
            super.onRestoreInstanceState(savedInstanceState)
    
            mBundle = savedInstanceState
            Log.d(TAG, "onRestoreInstanceState ${savedInstanceState.getString(KEY)}")
        }
    
        override fun onResume() {
            super.onResume()
            Log.d(TAG, "onResume ${mBundle?.getString(KEY)}")
        }
    
        override fun onRestart() {
            super.onRestart()
            Log.d(TAG, "onRestart")
        }
    
        override fun onStart() {
            super.onStart()
            Log.d(TAG, "onStart")
        }
    
        override fun onPause() {
            super.onPause()
            Log.d(TAG, "onPause")
        }
    
        override fun onStop() {
            super.onStop()
            Log.d(TAG, "onStop")
        }
    
        override fun onDestroy() {
            super.onDestroy()
            Log.d(TAG, "onDestroy")
        }
    }

App启动后，把状态栏下滑出来，点击切换深色主题/暗色模式后的生命周期：

![51fae68b816b44bda43ffacd32ecadee.png][]

[Android Activity生命周期以及onSaveInstanceState、onRestoreInstanceState要点备忘-CSDN博客本文作者：Zhang Phil原文链接：Android Activity生命周期以及onSaveInstanceState、onRestoreInstanceState要点备忘一般的，当Android activity的生命周期进入onPause后，Android系统紧接着就要回调：protected void onSaveInstanceState![favicon32.ico][]https://blog.csdn.net/zhangphil/article/details/48155371][Android Activity_onSaveInstanceState_onRestoreInstanceState_-CSDN_Zhang Phil_Android Activity_onSaveInstanceState_onRestoreInstanceState_Android activity_onPause_Android_protected void onSaveInstanceState_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_48155371][Android Fragment生命周期图以及Activity与Fragment生命周期对照图-CSDN博客Android Fragment生命周期图以及Activity与Fragment生命周期对照图Android Fragment生命周期图：在Fragment的生命周期中，需要重点关注onCreate、onCreateView、onViewCreated。Android Activity与Fragment生命周期对比图：Activi![favicon32.ico][]https://blog.csdn.net/zhangphil/article/details/49942843][Android Fragment_Activity_Fragment_-CSDN_Android Fragment_Activity_Fragment_Android Fragment_Fragment_onCreate_onCreateView_onViewCreated_Android Activity_Fragment_Activi_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_49942843]

[51fae68b816b44bda43ffacd32ecadee.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/c36d1a8551d747018e60b838c8177ee3.png
[favicon32.ico]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/13/4d176e24a23245319d607c08982e5f8d.png
[Android Activity_onSaveInstanceState_onRestoreInstanceState_-CSDN_Zhang Phil_Android Activity_onSaveInstanceState_onRestoreInstanceState_Android activity_onPause_Android_protected void onSaveInstanceState_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_48155371]: https://blog.csdn.net/zhangphil/article/details/48155371
[Android Fragment_Activity_Fragment_-CSDN_Android Fragment_Activity_Fragment_Android Fragment_Fragment_onCreate_onCreateView_onViewCreated_Android Activity_Fragment_Activi_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_49942843]: https://blog.csdn.net/zhangphil/article/details/49942843