当前位置：网站首页>Have you replaced commit() with sharedprefrence's apply()?

Have you replaced commit() with sharedprefrence's apply()?

2022-04-21 18:11:00 【InfoQ】

}else{//  Jump to the main page startActivity(new Intent(this,MainActivity.class));}

}}

public class GuideActivity extends AppCompatActivity {

@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_splash);getSharedPreferences(SplashActivity.SP_KEY,MODE_PRIVATE).edit().putBoolean(SplashActivity.IS_FIRST_IN,false).apply();}}

You can see that in the code , A chaotic operation , Nothing special , But early developers should know , Before, we all preferred  
commit()
  For submission . And now  Android Studio  When we use  
commit()
  When submitting directly, you will directly report a yellow warning .

null
nanche 
Android Open source project 《ali1024.coding.net/public/P7/Android/git》
 n

commit()  and  apply()  What are the similarities and differences ？

Let's talk about the same thing first ：

  • Both are submitted  Prefrence  Modifying data ;
  • Both are atomic processes .

The difference is directly on the source code , Have a look first  
commit()
  Method definition ：

/**

  • Commit your preferences changes back from this Editor to the
  • {@link SharedPreferences} object it is editing. This atomically
  • performs the requested modifications, replacing whatever is currently
  • in the SharedPreferences.
  • <p>Note that when two editors are modifying preferences at the same
  • time, the last one to call commit wins.
  • <p>If you don't care about the return value and you're
  • using 
    《Android Summary of learning notes + Latest mobile architecture video + Big Android interview questions + Project actual combat source code handout 》 Open source
     this from your application's main thread, consider
  • using {@link #apply} instead.
  • @return Returns true if the new values were successfully written
  • to persistent storage.*/boolean commit();

Take it all together  
commit()
  The annotation of the method is two points ：

  • The execution result will be returned .
  • If you don't consider the result and execute in the main thread, you can consider  
    apply()
    .

I want to see others  
apply()
  Method definition ：

/**

  • Commit your preferences changes back from this Editor to the
  • {@link SharedPreferences} object it is editing. This atomically
  • performs the requested modifications, replacing whatever is currently
  • in the SharedPreferences.
  • <p>Note that when two editors are modifying preferences at the same
  • time, the last one to call apply wins.
  • <p>Unlike {@link #commit}, which writes its preferences out
  • to persistent storage synchronously, {@link #apply}
  • commits its changes to the in-memory
  • {@link SharedPreferences} immediately but starts an
  • asynchronous commit to disk and you won't be notified of
  • any failures. If another editor on this

Last ： Learning summary ——Android Framework architecture knowledge brain map （ Hand painted xmind file ）

After learning , If you want to check the effect , In fact, the best way is to summarize it by yourself . For example, I will draw a hand-painted one after learning something xmind The outline of the document is the brain map , This can also facilitate subsequent review , And it's all your own understanding , I believe that just a few glance can quickly pass the whole knowledge , Brain replenishment .

Below is my hand-painted Android Framework architecture knowledge brain map , Because it is xmind file , It's not easy to upload , So Xiaobian leads it out in the form of pictures and spreads it here , The details are not particularly clear . But it can provide a complete Android Framework architecture knowledge brain map original （ Including the interview analysis above xmind file ）

null
besides , As mentioned above Alibaba Collector's Edition  
Android Framework architecture
  Handwritten documents and a  
《 Big talk data structure 》
  Books and other related learning notes , They can also be shared with recognized friends ！

—— Thank you for your support , Please note that ： give the thumbs-up + give the thumbs-up + give the thumbs-up ！！！

版权声明
本文为[InfoQ]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/04/202204211807382360.html

边栏推荐

猜你喜欢

随机推荐