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;
	@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。





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