<> One , Effect display

<> Two , Main controls used

* CheckBox
* RadioGroup/RadioButton
* ToggleButton
* SeekBar
* ImageView
* EditText
<> Three , Main code

1. Food

2.MainActivity Logical code
<> global variable :

<> Main methods :

1. Initialize control

2. Initialization data

be careful : Give food drawable Picture resources (int Type value ), use (R.drawable. Picture name ) that will do

3. Implement the corresponding events of the control

<> Four , harvest

* Reviewed CheckBox,RadioButton,ToggleButton,SeekBar and ImageView Use of
* ImageView Can be called setImageResource(R.drawable. Picture name ) To set the picture display
* Give food drawable Picture resources (int Type value ), use (R.drawable. Picture name ) that will do
* As long as it is …changed The listener calls back the listener only when the state of the control changes
* I realized java Object oriented in android Use in
* The core algorithm of search function is : Put the option of boolean Type conversion to int code , use switch case To filter the attributes of the food class
* Program debugging process log It's also very useful !!! Not necessarily only debug!!!

Technology
©2020 ioDraw All rights reserved
LeetCode quick get start ① —— Array series ( Often asked in an interview , Suggested collection ) Apple iPhone 12 Price leakage : The official highest price is close to 1 Ten thousand yuan ( Essence )2020 year 6 month 26 day C# Class library Ip Address help class spark.sql.shuffle.partitions and spark.default.parallelism The difference between flutter study -- Search box NVIDIA official apology : Robots are sold out RTX 3080django Do not close CSRF middleware , Custom through CSRF Tested post request 【 Deep learning 】 Target detection in progress IOU The concept and calculation of ( Essence )2020 year 6 month 26 day C# Class library DataTable( Extension method ) Can Huawei Hongmeng system and Android , Apples compete against each other ?