How to realize simple Calculator with Android
This article mainly introduces Android how to achieve a simple calculator, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.
The details are as follows
Function
1. Four operations of addition, subtraction, multiplication and division
2. Return to 0
3. Fallback
4. real-time operation
Configuration
Add the following code to build.gradle (app)
BuildFeatures {viewBinding = true}
The location to join is as follows
CompileOptions {sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8} buildFeatures {viewBinding = true}
Overall Arrangement
Code
Public class MainActivity extends AppCompatActivity implements View.OnClickListener {private String tv= "0"; private ActivityMainBinding inflate; private String count= ""; private boolean isMax=false; @ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); inflate = ActivityMainBinding.inflate (getLayoutInflater ()); setContentView (inflate.getRoot ()); inflate.zero.setOnClickListener (this); inflate.yi.setOnClickListener (this); inflate.er.setOnClickListener (this) Inflate.san.setOnClickListener (this); inflate.si.setOnClickListener (this); inflate.wu.setOnClickListener (this); inflate.liu.setOnClickListener (this); inflate.qi.setOnClickListener (this); inflate.ba.setOnClickListener (this); inflate.jiu.setOnClickListener (this); inflate.add.setOnClickListener (this); inflate.sub.setOnClickListener (this); inflate.mul.setOnClickListener (this) Inflate.div.setOnClickListener (this); inflate.point.setOnClickListener (this); inflate.equal.setOnClickListener (this); inflate.dec.setOnClickListener (this); inflate.ac.setOnClickListener (this);} private void jisuanqi () {List strs=new ArrayList (); StringBuilder f = new StringBuilder (); for (int iTun0) I1) {tv= tv.substring (0, tv.length ()-1);} else {tv= "0";} jisuanqi (); break Case R.id.equal: if (! String.valueOf (tv.charAt (tv.length ()-1)). Matches ("(\ d +)") {tv= tv.substring (0, tv.length ()-1);} count=tv; jisuanqi (); tv=count Inflate.tv.setText (tv); break;} Thank you for reading this article carefully. I hope the article "how to implement a simple Calculator in Android" shared by the editor will be helpful to you. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!
