Android Studio Realization of Cuboid Surface Area Calculator

This article example for everyone to share Android Studio to achieve cuboid, surface area calculator specific code, for your reference, the specific content is as follows

I wrote two methods (in my understanding, there are three methods, in which the circular string matches too much low, and pass drops). At present, I upload one first, and then make up.
There are a total of 4 files for this problem

Method 1: Regular expressions

1.MainActivity.java

package com.example.flyyu.four;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.util.regex.Pattern;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 }
 @Override
 public void onClick(View v) {
 EditText a=(EditText)findViewById(R.id.editText);

 EditText b=(EditText)findViewById(R.id.editText2);

 EditText c=(EditText)findViewById(R.id.editText3);
 Intent it=new Intent(this,biapmianji.class);
 if (!isNumber(a.getText().toString())&&!isNumber(b.getText().toString())&&!isNumber(c.getText().toString())){
 it.putExtra("a",a.getText().toString());
 it.putExtra("b",b.getText().toString());
 it.putExtra("c",c.getText().toString());
 MainActivity.this.startActivity(it);
 }
 }
 public boolean isNumber(String s){

 String pattern = ".*\\D.*";

 boolean isMatch = Pattern.matches(pattern,s);
 if (isMatch||s.length()==0){
 Toast.makeText(this," Input exception ",Toast.LENGTH_SHORT).show();
 return true;
 }
 return isMatch;
 }
}

2.biapmianji.java

package com.example.flyyu.four;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class biapmianji extends AppCompatActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_biapmianji);
 TextView textView=(TextView)findViewById(R.id.textView4);
 Intent it=this.getIntent();
 float a=Float.valueOf(it.getStringExtra("a")) ;
 float b=Float.valueOf(it.getStringExtra("b")) ;
 float c=Float.valueOf(it.getStringExtra("c")) ;
 String s=(2*(a*b+a*c+b*c))+"";
 textView.setText(" The surface area of the cuboid is :"+s);

// textView.setText(" The surface area of the cuboid is :"+a);
 }


}

3.activity_biapmianji.XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.example.flyyu.four.biapmianji">

 <TextView
 android:id="@+id/textView4"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginBottom="8dp"
 android:layout_marginLeft="8dp"
 android:layout_marginRight="8dp"
 android:layout_marginTop="8dp"
 android:text="TextView"
 android:textSize="18sp"
 app:layout_constraintBottom_toBottomOf="parent"
 app:layout_constraintHorizontal_bias="0.174"
 app:layout_constraintLeft_toLeftOf="parent"
 app:layout_constraintRight_toRightOf="parent"
 app:layout_constraintTop_toTopOf="parent"
 app:layout_constraintVertical_bias="0.083" />
</android.support.constraint.ConstraintLayout>

4.activity_main.XML

<?xml version="1.0" encoding="utf-8"?>
<!--<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"-->

<android.widget.LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context="com.example.flyyu.four.MainActivity">

 <TextView
 android:id="@+id/textView"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text=" Long: " />

 <EditText
 android:id="@+id/editText"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:ems="10"
 android:inputType="text" />

 <TextView
 android:id="@+id/textView2"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text=" Width: " />

 <EditText
 android:id="@+id/editText2"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:ems="10"
 android:inputType="text" />

 <TextView
 android:id="@+id/textView3"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text=" Gao: " />

 <EditText
 android:id="@+id/editText3"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:ems="10"
 android:inputType="text" />

 <Button
 android:id="@+id/button"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:onClick="onClick"
 android:text=" Calculation " />
</android.widget.LinearLayout>

For more calculator functions, please click on the topic: Calculator Function Summary to learn

About the Android calculator function realization, check the topic: Android calculator for learning.