Android Studio Realization of Cuboid Surface Area Calculator
- 2021-12-04 11:17:31
- OfStack
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.