Original link: https://juemuren4449.com/archives/note4-emergencymode-kindle-reader
I didn’t expect it to be possible to read books in the super power-saving mode of Samsung Note4.
meet again
When I went to my brother’s house during Chinese New Year, I found a Samsung Note4 lying in a drawer. It was a mobile phone I bought when I first went to work. Later, I gave it to my brother after I got a new one.
To be honest, I still have a lot of affection for this mobile phone. On the one hand, it is because it is the first mobile phone I bought after going to work, and it is a super-large-screen flagship mobile phone with a stylus that I have been thinking about; on the other hand, I didn’t have enough money at that time. Buy, my good friends know that I like this phone, so they lent me money to buy it.
Although it has been several years, when I saw it, I immediately recalled the feeling at that time:
- Large screen, amazing display effect
- Stylus, full of pretense
- big gap, phone pinch hair
- Small battery, enough for a day
- Scum Samsung, the flagship machine is stuck
Thinking of the old love, I am going to take it away, no one will use it anyway. After charging and turning it on, I found out that no one is really using it, and no one remembers the password. Fortunately, it can be unlocked by fingerprint, otherwise it will take a lot of work. One more thing, the fingerprint of Note4 is sliding to unlock, which is a very strange way.
idea
After getting the phone back, I cleaned the body, reset the system, organized the software, and played with it, feeling a lot of emotion.
After long-term use, the paint on the frame has peeled off, the battery is not durable, and even the screen is overwhelmed, leaving traces of “screen burn”. Thanks to Samsung’s AMOLED screen, it will really burn the screen. Wait, when it comes to the “Super AMOLED” screen of Note4, it suddenly occurred to me that besides the screen burn-in, it has another feature, that is, it displays black and does not emit light! Thinking about the super power-saving mode used to save power before, the black and white interface and restricted application usage can indeed save power.
Suddenly, I had a flash of inspiration, and I had an idea: can I use Note4 to install Kindle and read books in super power-saving mode?
- Although it is a mobile phone many years ago, but the Snapdragon 805 processor + 3GB memory, no matter how smooth it is, it is much smoother than the Kindle Youth Edition, right?
- While reading books smoothly, it can’t move the current mainstream software, which eliminates the interference when reading books.
- Coupled with the feature of the black background not emitting light, it saves power and causes less damage to the eyes.
install Kindle
The idea is beautiful, but the reality is cruel. It failed before the first step was taken, and the Kindle could not be installed, prompting “There was a problem parsing the package”.
I first downloaded the Kindle installation package on Kuan, and after retrying several times, it prompted a parsing error. I tried to transfer the Kindle installation package on my OnePlus phone to Note4 for installation, but the same problem still persists. But I had no choice but to download the installation package from Amazon’s official website, but the problem still remained the same.
Just when I thought this idea was going to be aborted, it suddenly became clear that I used Tencent’s “App Store” to successfully install Kindle!
I am curious why the installation package downloaded from other places or even the official download cannot be installed, how can the App Store be able to? Comparing the versions of my OnePlus mobile phone and Note4, it is obvious that Note4 is installed with a lower version. It should be that Kindle has given up support for lower version systems since a certain higher version. After all, almost no one uses Android now. 6.0 phones.
Next, log in to the Kindle account and set the reading background to black, which is half done.
Ultra Power Saving Mode
To be honest, because it has been too long since I used Note4 last time, I have forgotten the super power saving mode. I only remember that there is a mode that is black and white and saves power, but I can’t remember what this mode is called and how to enter it. up. Fortunately, there is Baidu, and you will know after a search. It turns out to be called “Super Power Saving Mode”.
After entering the super power-saving mode, I thought it would be enough to just add the Kindle to the homepage, but I ran into the second problem. In this mode, the Kindle cannot be found, and only the system and official software can be added.
In fact, even if I don’t use the super power saving mode, it can basically meet my needs, but as a person who loves to fiddle, how can I easily let go of this frustrating opportunity? In addition, the super power saving mode can not only save power, but also further reduce the colorful interference, why not do it?
search for solutions
After some searching, I found a tutorial ” Samsung Super Power Saving Mode Manually Adding Any Program “, which seems to be possible.
It is mentioned in the article that the database of the super power saving mode needs to be modified. In this case, it is necessary to obtain the Root permission of the mobile phone.
root
Continue to search for root tutorials for Samsung Note4, and find ” Samsung NOTE4 ROOT tutorial “, follow the steps step by step to complete Root.
It should be noted that red fonts will appear on the computer when it is turned on after rooting, which does not affect the use.
Root and the software mentioned below will provide download links at the end of the article.
modify database
After root, install SQLiteEditor and Root Explorer first, and grant Root permissions after opening. Use Root Explorer to find the emergency.db database file in the /data/data/com.sec.android.provider.emergencymode/databases directory, and copy this file to Backup elsewhere.
Then open the launcheradd table under emergency.db , click the Add button to add a piece of data, the values of package, class, permission and mode are as follows:
- com.amazon.kindlefc
- com.amazon.kindlefc.KfcUpgradePage
- 0000
- 1
After saving, go to Settings –> Battery, start the super power saving mode, and add it to the super power saving mode homepage by clicking the plus sign and selecting Kindle reading after startup.
If you want to remove the default icon, you can refer to ” Samsung Super Power Saving Mode Manually Add Any Program ” to modify it.
Here I can’t help but sigh with emotion, the feeling of Android being open is really good.
Summarize
Reading in Samsung Note4’s super power-saving mode feels good. Not only does it have no interference factors, but the page-turning is smoother than that of Kindle electronic paper books. I am very satisfied.
But it’s not perfect. Every time you lock the screen on the Kindle’s reading interface, there will be eight or nine seconds of blank screen time when you unlock it again, but it’s acceptable. After all, it’s an old machine, so you have to be tolerant.
In addition to tossing the phone’s system, I also scraped all the frame paint around the screen with a utility knife to make it look neater. Although the battery is not working well, I haven’t changed it yet, because it still saves power in the super power saving mode, and I will change it when it really fails.
It can be regarded as waste utilization if this old mobile phone can be used again. I really enjoy this tossing process, and finally can achieve the expected goal, this feeling is so cool.
Finally, all the software mentioned in the article have been placed in [ Lanzuoyun ] (password: 6o64), if you need it, you can pick it up yourself, and welcome to communicate.
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