Android的Activity什么时候会调用onCreate()而不调用onStart()？

Android的Activity什么时候会调用onCreate()而不调用onStart()？这是一道面试题。目前网上有关资料不多，就只有一篇知乎文章：

https://www.zhihu.com/question/49563455/answer/116926574

说是在onCreate里面添加ondestroy，本人试了是不行的。废话不多说，直接贴代码：

package com.example.dispatchevent;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.widget.Button;public class MainActivity extends Activity {Button btn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Log.d("TAG", "onCreate");//super.onStop();//super.onDestroy();finish();btn = (Button)findViewById(R.id.btn1);}@Overrideprotected void onDestroy() {// TODO Auto-generated method stubsuper.onDestroy();Log.d("TAG", "onDestroy");}@Overrideprotected void onPause() {// TODO Auto-generated method stubsuper.onPause();Log.d("TAG", "onPause");}@Overrideprotected void onRestart() {// TODO Auto-generated method stubsuper.onRestart();Log.d("TAG", "onRestart");}@Overrideprotected void onResume() {// TODO Auto-generated method stubsuper.onResume();Log.d("TAG", "onResume");}@Overrideprotected void onStart() {// TODO Auto-generated method stubsuper.onStart();Log.d("TAG", "onStart");}@Overrideprotected void onStop() {// TODO Auto-generated method stubsuper.onStop();Log.d("TAG", "onStop");}}

我们在onCreate()里面加了super.onStop();或super.onDestroy();，这样执行到onCreate()函数时，执行流程是这样的： onCreate -> onStop或onDestroy -> onStart -> onResume。最终还是会执行onStart。而如果加上finish()，则onCreate -> onDestroy，而不会执行onStart。

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