Android的Activity什么时候会调用onCreate(

原文地址：http://blog.csdn.net/liuweiweiwei/article/details/55261132

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;
@Override
protected 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);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.d("TAG", "onDestroy");
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
Log.d("TAG", "onPause");
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
Log.d("TAG", "onRestart");
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
Log.d("TAG", "onResume");
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
Log.d("TAG", "onStart");
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.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。