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  • Android Studio 之 Activity 的生命周期

    翻转屏幕,会重新加载Activity

    package com.example.activitylivecycle;
    
    import android.os.Bundle;
    import android.util.Log;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    public class MainActivity extends AppCompatActivity {
    
        //定义 TAG 方便自己容易查找日志
        //翻转屏幕,Activity 会重新创建加载
        String TAG = "myTag";
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Log.d(TAG,"onCreate: ");
        }
    
        @Override
        protected void onStart() {
            super.onStart();
            Log.d(TAG,"onStart: ");
        }
    
        @Override
        protected void onResume() {
            super.onResume();
            Log.d(TAG,"onResume: ");
        }
    
        @Override
        protected void onPause() {
            super.onPause();
            Log.d(TAG,"onPause: ");
        }
    
        @Override
        protected void onStop() {
            super.onStop();
            Log.d(TAG,"onStop: ");
        }
    
        @Override
        protected void onRestart() {
            super.onRestart();
            Log.d(TAG,"onRestart: ");
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            Log.d(TAG,"onDestroy: ");
        }
    
    
    }
    

      

    打开app后产生的事件
    2019-11-01 19:28:59.070 3334-3334/com.example.activitylivecycle D/myTag: onCreate: 
    2019-11-01 19:28:59.071 3334-3334/com.example.activitylivecycle D/myTag: onStart: 
    2019-11-01 19:28:59.072 3334-3334/com.example.activitylivecycle D/myTag: onResume: 
    
    屏幕翻转后执行顺序
    2019-11-01 19:29:10.748 3334-3334/com.example.activitylivecycle D/myTag: onPause: 
    2019-11-01 19:29:10.772 3334-3334/com.example.activitylivecycle D/myTag: onStop: 
    2019-11-01 19:29:10.772 3334-3334/com.example.activitylivecycle D/myTag: onDestroy: 
    2019-11-01 19:29:10.792 3334-3334/com.example.activitylivecycle D/myTag: onCreate: 
    2019-11-01 19:29:10.807 3334-3334/com.example.activitylivecycle D/myTag: onStart: 
    2019-11-01 19:29:10.811 3334-3334/com.example.activitylivecycle D/myTag: onResume: 
    

      

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  • 原文地址:https://www.cnblogs.com/gfwei/p/11779113.html
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