How to fix basic errors on Android. Writing from right to left. Wi-Fi Authentication Error

Today we will try to deal with one interesting point menu, in the Settings section - For developers. This menu contains 37 sub-items for flexible settings and deep control of your Android device. Next, we suggest that you familiarize yourself with each of them and consider screenshots of the menu itself for developers.

All actions are carried out on Nexus smartphone 4, which runs Android 4.4 OS. Commenting on each menu item is based on its description. If the reader knows more detailed information about some team - share your experience. Do not forget, you make all changes in this mode at your own peril and risk!

In order to enable the display of the “For Developers” item in the list of settings, you need to do the following:

Go to the settings menu
Go to point About the phone
Finding the line Build number
Click on it seven times.

If a notification like this appears, then we have succeeded!

The "For Developers" menu will now be listed in the gadget settings. On Android 4.4, the item is located between “Print” and “About phone”!

Here is a list and description of all the functions that the hidden menu gives us:

Generating a bug report- the button is inactive when normal operation devices.
Password for Reserve copy - the ability to protect complete backups smartphone or tablet data. The password is entered manually and created by the user.
Don't turn off the screen- activating this action will result in a constant screen backlight while the device is charging.
Select environment- two working environments are available for selection: Dalvik and ART. The latter is newer and is designed to improve the performance of applications and the device as a whole. Enable broadcast log- the command is used to save all HCI Bluetooth packets in a file.
Process statistics- Performing this operation will allow you to maintain statistics of running processes.
USB Debugging- enables debugging mode when connected to a computer using a USB cable.
Deny debugging access with via USB on all computers on which you signed in to your account.
Bug reports- the button is inactive in normal mode. When activated, the device will begin to display the option to send an error report in the menu.
Fictitious location - amazing feature who knows how to disguise current location owner with a gadget and give out false coordinates.
Select the application to debug- you can set specific applications to be able to debug them.
Wait until it connects- the application waits for the debugger to connect in normal mode. The button is inactive.
Installed via USB- the function allows you to check the security of applications installed via ADB/ADT. The button is inactive.
Wireless certification...- Displays certification parameters for wireless monitors.
Show clicks- when the button is activated, a dot is displayed at the points where the screen is pressed.
Show touches- visualization of clicks and gestures is carried out on the screen.
Show. update surfaces- windows are fully illuminated when they are updated.
Show element borders- provides display of clip boundaries, fields, etc.
Writing from right to left- displays the writing of texts from right to left for all languages.
Window: scale- setting the animation scale from 0.5x to 10x. You can also disable animation altogether.
Transition: scale- setting the transition scale from 0.5x to 10x. Disabling animation is also possible.
Animation speed- you can set the animation speed of the gadget in the range from 0.5x to 10x. Animation can be disabled altogether.
Emulation of additional screens- an interesting option that can emulate additional screens on the main one physical screen devices. By enabling this option, the user will see another screen that duplicates the main one. Dimensions additional screen are configured independently.
GPU acceleration- you can check the box and thereby always use the GPU for 2D drawing.
Show screen update- checking this box will ensure that the screen area is backlit when rendering on the GPU.
Show hardware updates- Enabling this feature will highlight hardware levels in green when updating.
Debugging overlay- this item contains three possible options for selection: 1) off; 2) show areas of overlap; 3) highlight areas a certain color; 4) show the number of objects.
Debug non-rectangular truncation operations- at this stage you can perform three actions: 1) disable the option; 2) non-rectangular section; 3) testing the command drawing green.
Enable 4x MSAA- by checking the box, the user (or already the developer) enables 4x MSAA in OpenGL ES 2.0 applications.
Disable hardware overlays- activating the item will entail constant use of the GPU when composing the screen.
Strict mode enabled - this mode will illuminate the screen of your Android device during long operations.
Show CPU usage- when this action is activated, the smartphone will display an additional window on its screen with graphical display current CPU load. Recording GPU running time- the name of this item speaks for itself.
Enable OpenGL tracing- has four possible option developments of events: 1) no data; 2) Logcat; 3) Systrace; 4) List of calls in glGetError/
Don't save actions- this menu item relates to applications; activating it will delete the summary of actions after they are completed.
Limit background processes - useful feature. It can limit the number of running applications in background.
All ANR- a checkbox placed next to this item will notify the user that the application is lagging (authentic) or not responding.

Devices - the number of devices on which this crash was observed at least once during the selected period of time.
Crashes by day - the number of crashes that occurred during the selected period of time.
% of all devices- the share of devices from which the crash was sent, from total number devices that launched the application during the selected period of time.

Viewing the crash log

To view a description of the log, click the button.

Also you can get statistical information about the devices from which crash messages were sent. To view statistics, click on the name of the log. By default, data will be displayed grouped by application version. You can select a different grouping (for example, Manufacturer, City, Operator, etc.).

Crashes can come obfuscated from Android and Windows devices and desymbolized from iOS devices. From such crash logs it will not be possible to extract data that would be sufficient to analyze the situation. To view a description of the log, click the button.

To deobfuscate or symbolize a log, click on its name and go to detailed statistics. Then, depending on your application platform, follow these steps:

Operations with crash log

If necessary, you can leave a comment on the crash log. This can be useful if more than one person is viewing the report. For example, this is how a developer can inform a manager that the crash has been fixed and new version the application will not appear.

To add a comment, click the button and enter text in the field. The comment field supports any characters. For example, if you are using a task tracker, you can insert a link to the task in the field.

Description crash log can be uploaded to a TXT file by clicking the button and then the Save button. However, if you added a comment, it will not be saved in the TXT file.

Errors report

The report displays errors sent by the application through the AppMetrica SDK, as well as statistical information about them. For details about sending error messages, see Developer's Guide→ AppMetrica SDK(Android | iOS | Windows).

The report supports data segmentation and displays the following metrics:

Devices - the number of devices from which error messages were sent at least once during the selected time period.
Errors - the number of occurrences of an error during the selected period of time.

To view a description of the error, click the button.

You can also get statistical information about the devices from which error messages were sent. To view statistics, click on the error name. By default, data will be displayed grouped by application version. You can select a different grouping (for example, Manufacturer, City, Operator, etc.).

The error description can be uploaded to a TXT file by clicking the button and then the Save button.

Export data

Data from a report can be exported by selecting an item from the Export drop-down list above the graph. Data is exported taking into account the selected report settings: segmentation, grouping, time period.

The list contains the following elements:

Export to CSV- exports data from the table to CSV format.
Graph to PNG - exports graph images to PNG format.
Graph to CSV - Exports data from a graph in CSV format.
Copy Table API Query- displays the text of the request for unloading data from the table using the reporting API.
Copy chart API request- displays the request text for downloading chart data using the reporting API. The received request can be used to build your own dashboard or create automatic data upload scripts.
Note. If this is your first time receiving a request text, make sure your browser has not blocked the authorization pop-up window. In the authorization window, allow AppMetrica to access the data.

Not a single modern one operating system For portable devices cannot compete with Android in terms of settings and customization options. It’s not surprising, because in Google’s OS you can configure absolutely everything, every little thing.

However, many users are not aware that great amount the functions of their Android device remain hidden. It's about about the possibility of debugging the device and some other functions that are only possible in “developer mode”, which in most cases is disabled and hidden from the user’s eyes. We will tell you how to enable it and what features it provides in this guide.

After activating this mode, the Android settings menu appears new section called "For Developers". It opens up new possibilities for the user. Let's consider some of them, which can be useful even for a simple user:

Log Buffer Size – provides the ability to select the amount of memory;
GPU acceleration – activates 2D graphics processing;
Show CPU load – displays a screen with information about the current CPU load;
USB connection – select the operating mode of the device when connecting it to a PC via USB;
USB Debugging – Enables debugging mode when connecting your Android to PC using a cable.
Fake device location - allows you to make applications “think” that you are located in another part of the world.

Activation

Enabling developer mode is easy. To do this you need:

List of available settings

Now let's look at the functions of the developer section in more detail.

Be careful: when working with settings in developer mode, due to inexperience of users, the device may malfunction and even lose data. Therefore, it is recommended that you enable or disable certain features with caution.

Generate a bug report. The option is intended for sending error reports. Files for sending are created within a couple of minutes.
Backup password. This item allows you to use ADB to backup data on your PC. To create a copy, you must enter a password.
Active mode.
If this option is enabled, the device screen will not turn off when it is connected to a PC. It should be used with caution, as prolonged use of the screen may damage it. Selecting a working module.
Tool to select ART or Davlik. There's no point in changing anything if you don't know what it's for. Enable broadcast log of HCI Bluetooth operations. This function
useful only for developers because it allows you to intercept and analyze Bluetooth packets. After enabling this option, packets will be saved in the file “btsnoop_hci.log”. The file can be opened and analyzed in Wireshark or similar. Shows information about processes that are in this moment running on the device. For simple user is of no use.
USB debugging.
Allows you to connect your device to your PC via ADB. Revoke USB debugging authorization.
When debugging a device via USB for the first time, it must be authorized using keys. Using this setting, you can cancel this action and repeat it again. Bug reports.
The option is very useful for testing applications. By holding down the power button, you can collect and send reports about failures and errors. Fictitious locations.
Allows you to manually set a location. Used by some developers to test geo-referenced applications. Debugging applications. You can manually set applications to debug. Helps developers ensure correct operation
application code.
Check via USB. Using this option, you can scan applications delivered via ADB and detect malicious activity. Touch display. If the option is activated, the screen will display
visual effects, indicating touches on the screen.
Pointer location. Displays the coordinates of the last point you touched the screen. Show layout boundaries. Displaying outlines of elements in
dialog boxes. Allows you to more accurately determine where to click to activate an element on the screen.
Writing from right to left. Enables changing screen orientation. This option is required to work with right-handed character input (necessary for some languages). Emulation of an additional display. Useful only for developers as it allows emulation
different sizes display.
Forced rendering. Enables applications to use hardware 2D rendering. In some cases, it can give an increase in productivity, in some, on the contrary, it can ruin everything. Best used with caution. Debugging overlay. Allows you to see overlaps that occur at the time of rendering
graphic system
images on top of something. Activation of 4x MSAA.
Forces enhanced anti-aliasing to be activated. After activation, the performance of the device noticeably deteriorates. Display CPU load. Displays information about the current CPU load. Installing a GPU profile.
The option allows you to save in separate file
Graphics system load chart. This option allows you to manually set the number of processes running simultaneously in the background.
Show ANR. Enables display system messages when applications freeze. Useful if applications conflict with each other.

Deactivation

This procedure is also quite simple. On some devices you just need to find and open the section in the settings menu "For developers", and in it move the switch to the “Off” position. But in this way, we will only disable this mode, that is, it will still remain in the settings. And again, let’s make a reservation: this feature is not available on all devices.

To completely remove a function from the menu, you must do the following:

Conclusion

Of course, the majority of users do not need the settings described above at all. If you're new to options and don't understand what they do, it's best to leave them alone and not change anything. Remember, developer configurations are hidden from mere mortals for a reason. Use them wisely.

The world's most popular OS is known for its instability. Every Android user has encountered one error or another at least once, but not everyone has found a solution. It’s definitely not worth changing your device right away because of this. Next, we will look at the main errors on Android and how to solve them. Often there is no error, but only a small function that can be solved in a couple simple actions.

Sometimes Android may display system errors. There's nothing wrong with that

This section contains problems that are usually easy to fix or not required at all. Often the cause may not even be the device itself. But there are also some that make users nervous.

Low memory

This cannot be called a bug, but rather a limitation of the capabilities of your device. Yes, indeed, on old, and even new, devices, the internal memory sometimes runs out abruptly. The problem is solved very simply.

If you use applications such as Instagram, VK, then the cache is definitely to blame, which they accumulate very quickly and in large quantities.

Go to “Settings”, select “Applications”.
Often those who occupy the top are immediately brought to the top greatest number memory. Click on them.
Select the “Clear cache” item.

There is nothing wrong with the “insufficient space in device memory” error; it can be easily resolved

This cleaning can free up to several gigabytes. free space. You can also completely erase the data in the application, but then you will have to “log in” again.

Because of memory full errors may occur under different numbers. For example, error 919, when the application cannot start due to insufficient space.

On some devices (not all), you can transfer some programs to a memory card. This will free up even more space. This is done from the same item in the settings. It is better to monitor the availability of free space more often so that the gadget always works properly and without brakes.

Wi-Fi Authentication Error

Also one of the most popular problems on Android. Although in fact, very rarely the problem lies in the device. More often than not, the cause is the router, or more precisely, its incompatibility with your device. The problem is resolved quite quickly.

The first method, the most obvious, is simply to check that the entered password is correct. After all, authentication is nothing more than checking the security key. Therefore, try to forget the problematic network and then re-enter the password.

If everything is fine with the password, but Wi-Fi still doesn’t want to connect, then the reason clearly lies in the router settings. The fact is that its data encryption type may be older than that used on the Android device, or the device does not support any network standard.

In this case, you need to go to the router settings.

Open the browser. IN address bar enter “192.168.1.1” or “192.168.0.1”.
In the window that appears, enter your username and password: most often these are admin and admin. If you have others, then enter yours.
Now you need to find the settings Wi-Fi security. Here we set a mixed encryption type or network authentication“WPA-PSK/WPA2-PSK2 mixed”, and also select automatic selection network standard.

After this, problems with connecting to Wi-Fi should disappear.

Syntax error

The error is that the file that installs specific application, is incorrect or was not launched correctly. Additionally, there may be a failure during installation, which also results in a syntax error.

The fix is pretty easy. First, make sure that the file you downloaded has apk format. Because it is files of this format that are application installers on Android. Secondly, delete this downloaded file and re-download it and then reinstall it. It makes sense to try downloading the file from another site. This usually clears the error.

loading error

This often happens on older devices, but on new ones this problem no longer occurs. Thing is standard manager downloads are glitchy, making it difficult to download anything from the internet. The error is fixed quite easily.

You just need to download a new download manager. ES Explorer may be perfect for these purposes. It has a good built-in download manager.

Android Keyboard AOSP

This keyboard itself is not the best. In addition, it is not very well optimized on some firmwares, which causes errors. Solving them is simple.

Disable voice input in your keyboard settings.
Reset the settings, erase the cache and data of the application that is responsible for the keyboard.
Just download from Google Play Market any other keyboard.

Errors with Google Accounts

There can be two errors: the account does not want to synchronize or does not want to be added. The first can be present on both old and new devices, while the second is gradually becoming a thing of the past. Fixing all this is not that difficult.

Check the quality and stability of your Internet connection: mobile network or Wi-Fi must work normally, otherwise the reason may lie in them.
If an account has already been added but is not syncing, simply disable it, restart your device and log in again.
If your account refuses to connect, first make sure your login and password are correct.
Disable two-step sync in your account settings.
Enable automatic synchronization and background data transfer, then restart your device.

Netalpha virus

New problem encountered Android users. This malware makes it difficult to work with your phone and prevents you from removing it. The problem is quite serious because it involves only two solutions, one of which is very radical.

Reset the system to factory settings. More details on how to do this are at the end of the article.
If you have root rights, you can download Lucky Partner and remove the ill-fated application.

Com.android.snap

Occurs when using various applications: popular photo editors, messengers. This inscription often appears on a black background, which is very distracting, and programs may simply close.

This glitch is believed to be caused by malware, so many people advise simply installing an antivirus. However, you can do without it using systematic methods.

Go to the settings menu, to the “Applications” item.
We look for the application “com.android.snap” there.
We delete its data, clear the cache and stop it.
You also need to uncheck the “Send notifications” checkbox.

After this, the program will stop annoying you, and you will no longer see this message on the black screen. If you have an antivirus installed on your device, you can remove the bug using it. But, as practice shows, this error rarely occurs on devices with antivirus software.

Besides com.android.snap, there is also com.android.systemUI. What they have in common is that they are Trojan-type viruses. Accordingly, the program is neutralized in the same way.

Com.android.phone

If the system says that the application is com.android. phone an error occurred, which means the problem lies in the program that is responsible for making calls on your tablet or smartphone. An error appears on various reasons. Therefore, the solutions will be different for everyone.

Try unchecking the settings in the settings. automatic synchronization dates and times via the Internet and then put them back. After that, reboot your phone and set correct date and time on your own.
Erase data and delete the Phone app cache.
You can simply download any “dialer” that will replace the standard one, since the application store is full of them.

Android.process.acore

If an error occurs with android.process.acore, then the problem is no longer related to either the dialer or viruses. The reasons may be the following:

missing system files;
Some system application has stopped working;
There are several applications on the device that perform almost the same functions, and they do not synchronize correctly with system applications

The difficulty of solving a problem depends on the cause of its occurrence. Most often, it is resolved simple removal all contacts through the device settings. If you synchronize all your contacts with Google before doing this, you won’t lose anything at all.

There is an option to reset all applications through the corresponding menu item. This also often solves the problem without losing any data. If you have optimization applications installed Wi-Fi work, then you should try to remove them too. Often the reason lies precisely in them.

Adroid.process.media

The Android Process Media error occurs for two reasons: Media Storage or Download Manager. Both can be solved quite simply. There are two general methods that almost always work flawlessly.

First way

Clear cache and data Google applications Services Framework and Google Play Market.
Stop Google work Services Framework (must be done in this order).
Clear the cache of this utility again.
Open Google Play, find problematic application. When you receive an error message, click OK.
Reboot your gadget and restore disabled Google services.

Second way

Completely stop Google sync account. This can be done from the account settings: in the “Synchronization” item, you must clear all the checkboxes.
Erase the data and stop the Gallery utility.
Similarly, disable the "Download Manager".
Reboot your device.

After using one of these methods, the problem will disappear.

Invalid batch file

The error often occurs when updating an application. If this happened during an update, you need to clear the cache of this application. Alternatively, you can try to manually download apk file program and install it again. If this doesn’t help, delete your Google account, reboot your device and log in again.

PACKADGE FILE INVALID

We delete the cache and data of the problematic application.
We go to Google Play and install it there.
Cleaning Google data Play and Google Service Framework.
We update the application via Mobile Internet, not Wi-Fi.

Installation unsuccessful error

Reinstall the problematic application.
Clear the cache and delete Play Market data.
Disconnect the memory card from the device.
Delete the folder.android_secure.
Reinstalling the application.

Error number...

These errors can be more serious. However, they are often resolved in a few simple steps. It all depends on the number of this very error. Moreover, Google provides a minimum of information about solving various errors.

11, 101, 504, 506, 491, 495, 413, 941, 921, 920, 481, RH01: Google Play and account problems

These applications or account problems are solved using almost the same methods. Android may issue “Error code 11” when work Play Market. Problems often occur under specific numbers precisely with this Google service. It has been noticed that error 11 often occurs when installing or updating WhatsApp.

Another popular error due to which the Play Market also does not want to download the application is 504. It occurs on Android due to the same reasons as other problems with downloading programs, so the elimination methods are identical. The same goes for other errors.

Problems are solved in several ways, and each of them is suitable for most similar errors.

We exhibit right time and check the operation of the Internet connection.
Checking the amount of free internal memory: it should be higher than the size of the programs that are having problems loading.
After that, try simply restarting your phone or tablet. Google Play Market errors on Android are often solved in this way.
Resetting the settings. Using the method indicated above, open the window Play apps Market, then clear the data and cache. Then go to the Application Store again. Alternatively, you can also uninstall all updates in the same window, which will return the program to its original state. original form when purchasing a device.
You can do the same with the program “ Google Services Play" if the previous method did not help. If this does not help, then you can try to do a similar operation with Google Services Framework.
The problem could also be a disabled application " Google Accounts" We go into its window, if we see that it is turned off, then we turn it on. You should also enable the “Download Manager” if it was turned off.
We try to log out and log back into our Google account. This is done from the settings. There we find the item “ Accounts" and select Google.

24

Error 24 occurs when installing an application on Android, when some kind of failure has occurred, and some of the files have already been installed. Or you had this application before, you deleted it, and then decided to download it again. The problem is resolved quite quickly.

Launch any file manager.
We find the directory “sdcard/Android/data/data”, it contains files related to this application. They will contain the name of the program in the name, so they will be quite easy to distinguish from the rest.
We do the same in the “data/data” directory.

After this, the error should disappear and the application should install without any problems.

498

This error occurs when loading an application. There may be several problems, but they are quite easy to solve.

Check your internet connection.
Clear the cache of several programs, and first of all - Google Play.
Wait a couple of hours. It is quite possible that the reason lies in Google servers. If so, they will fix it quickly.

After this, the error should disappear.

923

We delete a Google account and several unnecessary programs, clear the cache.
Clearing the system cache:
1. Go to Recovery (ON button and volume control button and hold).
2. Choose Wipe Cache Partition.
3. Reboot the device.
Reboot the device.
Login to Google again.

403

There is a so-called Dalvik cache. Due to its filling, we again do not want to install certain programs. To solve the problem, we clean the data and disable first “Google Accounts” and then the Google Play Store.

Rh01 /rpc:s-5:aec-0 /RPC:S-3

The system cannot receive information from the server. To fix the problem, you need to do the same as with other similar errors.

Clear the cache and remove unnecessary unnecessary applications.
Erase data and stop Play Market and Google Services Framework.
As described in the previous error (403), delete the cache through Recovery.

492

Content from Google Play is not loading again.

We clear the data and stop Google Play Services.
We do the same with Google Play Market.
Delete the dalvik cache if the problem is still present. However, this can only be done if you have root access.
If you don’t have root rights, then you’ll just have to do a full system rollback.

911

It also doesn't allow you to download apps.

We clear the data, cache, stop Google Play Market.
Try connecting to another Wi-Fi networks or use mobile data to download the app.

Rpc:aec:0]

Problems receiving data from the server. Deleting all synchronized accounts may help. Then we clear the cache and Play Store data, and then restart the smartphone or tablet.

A similar error is RPC:S-3. In this case, you only need to delete your Google account, after which you can try to connect another one or the same one.

927

This fault is independent of our device. The reason lies in the fact that the program is updated by the developers. Therefore, if we want to install or update it, we will not be able to do this. It's just worth trying to install it again after 30 minutes or later.

How to solve any errors

And finally, a method that is suitable for fixing any problems. But you should always resort to it last. This . Full reboot Android systems will delete all user data, so you should first transfer the most important data to a memory card or save it in cloud services.

Open the settings.
Select the item “Reset and recovery”, on different devices it can be called differently and can be located either in the settings menu itself or in the “System” item.
Click "Reset".

After this, the device returns to factory settings, all problems disappear.

Now you know how to fix the vast majority of errors on Android. There are many more of them, but the rest of the problems have similar solutions, especially Google Play service errors, which are so rare that there is no data about them yet or have already been corrected by the developers.