Mobile Phone Test FAQ Summary!

1. Why can't I read the photo and video files saved in my phone when I back up the data recovery interface?

1. Startup failure self-help plan is designed to be when the system does not boot normally, the maximum amount of user data saved, so the first need to save is the contact person, SMS, memo and other important core data.
2. The memory of the phone used in the backup process ( copied from DATA_BK to the data area ), so if you want to back up a large file such as a picture or video, the size of the file is not controlled and there is insufficient memory to cause a backup error. Therefore, in order to ensure the stability of the backup function, the backup function can not back up the image video files.
3. The Backup app does not see the photos and videos in the phone's built-in storage because the data is not backed up from the DATA_BK (read-only or corrupted data area) to the newly created blank data area.

2. The call log is not recorded after the connection is connected to the call process?

Example:1, the measured phone a call B
2. Telephone C Dial -in during the call
3, Hang up the phone A, access phone C
4. View Call History

Reason: The telecommunication network is different from the mobile or the Unicom network, for the Mobile (unicom) network, when the three-party call, all the way up, the network issued a test machine hangs up the message, the test machine execution hangs the process, simultaneously writes the call record, but the telecommunication network is different, in three party calls, The network will not send a hang-up message to the test machine, the test machine can not know that all the way has hung up, will not carry out the hang-up process and write call records, only after the final hang, only write call records.
Therefore, this is caused by the particularity of the telecommunication network, belonging to the normal

3. Fast and continuous press the photo key process, mobile camera, transform framing screen, why the phone preview screen has been stuck in the first picture of the picture?

Photo process: Stop the preview and then open the preview after the photo is completed, the quick photo process, the preview data is not displayed and then stop the preview to start the next phase of the photo. The preview screen is always fixed in the first scene is normal phenomenon

4. MP3 background play, set up a call, during a call, if plug-in headphones, why end the call after MP3 playback does not recover?

The general practice of the music player is that when a headset is unplugged, it will stop playing, and then inserting or unplugging the headset will not change the status, so there is a mechanism in the call process, so it is normal

5. C Card was transferred to call, why did not prompt is to be transferred to call,G card has been forwarded call prompt?

1. C Call transfer is achieved by dialing the number provided by the operator,C card Set call transfer, by dialing the phone settings, the machine is not displayed call transfer, at present,C card machine is such a practice;
2. G Card is realized by special signaling with network interaction, and the principle of implementation is different.

6. Browser Open bookmark Baidu Map, why sometimes can't locate?

Baidu Web Map using WiFi or mobile network location information to locate, when the card data Service network status is not good or the location information is not enough to be located, and WiFi use network location information, positioning or relatively accurate. GPS positioning accuracy is high, but its shortcomings are also very obvious, specifically as follows:

(1) from the start of the GPS module to obtain the first location data, it may take a long time, after the opening of GPs for a period of time positioning or relatively accurate;

(2) indoor is almost impossible to use, so the positioning often occurs inaccurate phenomenon.

7. Why the online video playback process, the switch video is a suspended window, the middle of the lag and black screen, not smooth?

(1) video playback Click the hover form to play, the equivalent of the video player closed, re-established a play connection, not just the way to transfer the screen playback content to other interfaces.
(2) The whole process involves the following:

Play Stop -"disconnect -" destroy window -"Create hover window -" Play data preparation -"Set data Source-" data buffering -"video playback process. It is not possible to have a black screen (the default playback background color) and a buffering (lag) condition.
This process and the relationship between the network is not big, unless the network buffering video data is too slow to reflect, otherwise in the network excellent situation will also have a black screen process. This is inevitable, after all, the process is equivalent to restarting a player to play the video.

8. Why does the screen brightness change when fast and weak light switch?

Whether the backlight adjustment is based on the reported intensity of light converted to the corresponding backlight value, when the newly reported light strong corresponding backlight than the current back or hour, backlight adjustment, adjust the backlight to lighten or darken. For this backlight adjustment time has strict restrictions, such as from the darkest to the brightest to be completed in 6s, if the flashlight after the light sensor is reported to wait for 2 seconds before the backlight adjustment, then the total time will not meet the standard. The light sensor reported the frequency of 200ms, in the report 7,8 times No backlight adjustment, this requirement is contrary to some requirements, can not be handled, not the problem

9. cell phone internal storage space minus the space to download the file less than 20M Why is there not enough space to prompt?

When downloading the file, the browser will determine the remaining space of the storage device, and reserve some space, which is reserved to avoid some other problems caused by the full storage space, for example, the memory space of the mobile phone will not be able to take photos and other functions, but also affect the speed of the system, And a lot of system applications if there is insufficient memory of the phone will be problematic, so it is important to ensure that there is a certain amount of space within the system. Therefore, it is not a problem to reserve and part of the space when downloading.

Why does the phone not automatically download lyrics and pictures when I download lyrics and pictures and play local music?

Lyrics and pictures are downloaded by searching the xx music server to find the matching music will be downloaded action, if the automatic search for lyrics There are three kinds of situations:
1. There are no lyrics or pictures matching the search criteria on the server
2, the network signal is not good to search lyrics, unable to automatically download
3, automatic search without resources will be recorded in the database to save a week in this week, again triggered automatic search, is not access to the network,
start displaying no lyrics under the 2G network, then select "Search Lyrics " to come out and go straight out of the lyrics under WiFi. This should be a bad network situation, the request timed out, so it is normal to return no songs.
Because the criteria for searching for lyrics are editable, it is also normal for the lyrics to be searched for when editing the search criteria, which may not match the song.

How to use logcat to crawl log?

adb shell logcat–v time>e:/aplog.log (Explanation: Press ENTER after the input is done on the phone to do related actions, the operation completed in the computer's e-find name Aplog.log files are available)

How to use adb to grab phone commands?

adb shell/system/bin/screencap-p/sdcard/screenshot.png (Explanation: Save to SDcard)

adb pull/sdcard/screenshot.png d:/screenshot.png (explanation: saved to PC D Drive, Find the name screenshot.png in the D drive)

The application of the transmission cannot be installed (for example)?

For example, when an app in a phone is dragged out using adb pull, the app is transferred (Bluetooth,WLAN direct, etc.) to the b phone, why is the installation unsuccessful?

The causes are analyzed as follows:

Prerequisites:The APK must contain classes.dex

The apk will be Dex into the apk and Odex files in the user version to speed up the app's access, and if there are no classes.dex files in the transmitted apk , the app will not be installed successfully.

Explanation:Odex is the executable file extracted from the Android app Apk, and the classes.dex file in the APK will be optimized by the Dex optimization process to generate a . dex file stored separately, the original the Classes.dex file in the APK is retained, which can speed up the software startup, pre-fetch, and reduce RAM usage because there is no odex. System to extract Dex from APK package and run

Uninstall the software using the adb command?

Prerequisites: The phone is Eng version

ADB Uninstall < software name >

ADB uninstall–k < software name >

If the –k parameter is added, the software is uninstalled but the configuration and cache files are preserved

install software /reinstall software using ADB command?

Prerequisites: The phone is Eng version

adb install < software name >

ADB install–r < software name >

How do I use pull to download files from my device to my computer?

Prerequisites: The phone is Eng version

ADB pull < remote path > < local path >

How do I send files from my computer to my device using push?

Prerequisites: The phone is Eng version

ADB Push < local path > < remote path >

wlan direct connection can be connected 2 devices, why disconnect 2 are automatically disconnected?

in the WiFi Direct connection protocol, the two devices will be automatically negotiated when they are connected, one of the devices serving as the host side, and the other as the client side. When the wifip2p is established, the host side is essentially a hotspot, and other devices can join the group as a client via peer-to- peer protocol . (the way to differentiate between the host side and client side is to observe the groups that are automatically saved after the connection is established, which device the group name is, which is the host), and after a one-to-many group has established a connection, Client side disconnects, only this one device exits this group. However, if you disconnect from the host side, it is equivalent to this host exiting the group, so all connections are disconnected at this time.

Mobile Phone Test FAQ Summary!