[Android studio] batch data import to Android local database

There is a problem in the project , Now I need to import a large amount of data into the local original database for data simulation ,app Used in litepal To operate the database , Now let's talk about how I can import a lot of data and record some problems encountered in the process without using one line of code

preparation

1. The computer has sql Data visualization tools , I'm using navicat 15 , Yes wps To operate excel
2. stay Device File Explore( stay android studio There is usually a quick open window in the lower right corner of ) Find the location of the database in , Usually in data/data/ Package name /database/ Next , You will see three files
   ps： Why should we find the original database because , What you want to operate is this database , If there is a database import with the same class name and structure, it will prompt that the version number of the database is inconsistent （ If the version number is the same , I don't know whether other problems will be introduced ）

Operation steps

1. Original database export
Right click the package name of the project where the original database is located , Click on save as Save the database to the directory you know on your computer
2. Use navicat Open the exported database
open navicat Tools , It will be an empty , Drag and drop the exported file directly , It will turn on automatically
** 3. from navicat The format of exported data in is excel Format **
Double click the table you want to export data , After opening, you can view , Local original data of the project （ Of course, you are actually usb Connect the phone , When opening a project Android studio Bottom APP inspection You can see ）, And then click navicat Export at the top of the middle table , choice excel Data format , Follow the prompts , Just keep clicking next , At the last step, click start to see the green progress bar ,（ Remember to record the directory you exported ）

4.excel Open the file to add data
4.1 When adding data, remember to match the field type in the table you defined ,
4.2 Pay attention to inspection char Data of type , Give a default initial value , Otherwise, it will appear when importing into the project Caused by: java.lang.StringIndexOutOfBoundsException: length=5; regionStart=0; regionLength=0 Error of
4.3 Note the... Defined in the table key value , Column de duplication is required ,id The value needs to be incremented
4.4 navicat A column will be added at the end of the export , You can check that you can delete
4.4 Remember to save when operating
5. take excel Import the table into the original database table
open navicat（ step 2）, Click Import , choice excel Import ,

Click next , Select the of the operation excel Next , Default is good , Click next , Choice mode , Select append or update , Because we are adding data , If you just modify, you can choose to update
Click next , Click Start , When the progress bar is over, you can go to navicat Data related inspection in , Is there any blank , If there is , You need to check the following , If gray nul It is normal that there is no data （ The last column under my data is char Type of , I gave him default 0, Because this field is not really used in the project ）
6. Import into the project database
stay Android studio Open in device file exlore, Click the directory of the original database database（ step 1 Reverse operation in , This choice upload）, Click on upload, choice navicat Location of the database in （ In fact, you are in step 1 Export location in ,） Click on shift Choose three files , Click on ok that will do , There will be a progress bar prompt , Note the size of the three files
And still database Right click to select , Conduct synchronize Refresh of , You can do it in AS Bottom app inspect Check whether the data is imported successfully ,
Then you can happily carry out project related tests and troubleshooting

The end of this paper ~
If you know how to navicat 15 Please tell me the specific operation in the comment area step
If you need to navicat 15 Related installation packages of the software , Please confide in me