Mobile Application Development

Mobile Application Development – Android Studio Tool Download

Hi guys, I am Prabakaran, Welcome to innovative codes academy, In this section we learn about

How to do download android studio software and open new project?

Click on below link:

https://youtu.be/vcN1ufruiNE

Android Studio Tool Download link given below:

https://developer.android.com/studio

How to do develop mini calculator application in android studio tool? Easily make android app.

JAVA Source Code:

MainActivity.java

package com.example.minicalculator;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    EditText tv1,tv2,tv3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv1=findViewById(R.id.t1);
        tv2=findViewById(R.id.t2);
        tv3=findViewById(R.id.t3);
    }
    public void add(View v)
    {
        int a=Integer.parseInt(tv1.getText().toString());
        int b=Integer.parseInt(tv2.getText().toString());
        int result=a+b;
        tv3.setText(String.valueOf(result));
    }
    public void sub(View v)
    {
        int a=Integer.parseInt(tv1.getText().toString());
        int b=Integer.parseInt(tv2.getText().toString());
        int result=a-b;
        tv3.setText(String.valueOf(result));
    }
    public void mul(View v)
    {
        int a=Integer.parseInt(tv1.getText().toString());
        int b=Integer.parseInt(tv2.getText().toString());
        int result=a*b;
        tv3.setText(String.valueOf(result));
    }
}

XML Source Code:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:stretchColumns="*">
    <TableRow>
        <EditText android:width="220dp" android:hint="Enter the First number" android:id="@+id/t1" />
    </TableRow>
    <TableRow>
        <EditText android:width="220dp" android:hint="Enter the Second number" android:id="@+id/t2" />
    </TableRow>
    <TableRow>
        <EditText android:width="220dp" android:hint="Result" android:id="@+id/t3" />
    </TableRow>
    <TableRow>
        <Button android:text="Addition" android:width="100dp" android:onClick="add"/>
    </TableRow>
    <TableRow>
        <Button android:text="Subtraction" android:width="100dp" android:onClick="sub"/>
    </TableRow>
    <TableRow>
        <Button android:text="Multiplication" android:width="100dp" android:onClick="mul"/>
    </TableRow>
</TableLayout>

AndroidManifest(File):

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.minicalculator">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Click on below link:

https://youtu.be/aYNRqAXxhaQ

Android Studio Tool Download link given below:

https://developer.android.com/studio

Mobile Application Development – Build your application in Apk format

How to do build your application in Apk format and How to do open new file in your project?

Android Studio Tool Download link given below:

https://developer.android.com/studio

Mobile Application Development – Build your Mobile application Calculator in Android Studio Tool

How to develop Mobile Calculator in Android Studio Tool?

Using Rhino Library Package:

Rhino Library Package:https://github.com/F43nd1r/rhino-android

Google Fonts:https://fonts.google.com/

You want source code contact me:

innovativecodesacacademy1@gmail.com
watch full video, Any doubt or quires leave comment with your mail, I will chat with you.

JAVA Source Code:

MainActivity.java

package com.example.calculator_01;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;

public class MainActivity extends AppCompatActivity {
    Button btn0,btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9,

    btnBracket,btnClear,btnPercent,btnDivide,btnMultiplication,

    btnMinus,btnAddition,btnEqual,btnDot;

    TextView tvinput,tvoutput;
    String process;
    Boolean checkbracket=false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn0 =findViewById(R.id.btn0);
        btn1 =findViewById(R.id.btn1);
        btn2 =findViewById(R.id.btn2);
        btn3 =findViewById(R.id.btn3);
        btn4 =findViewById(R.id.btn4);
        btn5 =findViewById(R.id.btn5);
        btn6 =findViewById(R.id.btn6);
        btn7 =findViewById(R.id.btn7);
        btn8 =findViewById(R.id.btn8);
        btn9 =findViewById(R.id.btn9);
        btnDivide =findViewById(R.id.btnDivide);
        btnAddition =findViewById(R.id.btnAddition);
        btnMinus =findViewById(R.id.btnSubtraction);
        btnMultiplication =findViewById(R.id.btnMultiply);
        btnPercent =findViewById(R.id.btnPercent);
        btnBracket =findViewById(R.id.btnBracket);
        btnClear =findViewById(R.id.btnclear);
        btnEqual =findViewById(R.id.btnEqual);
        btnDot =findViewById(R.id.btnDot);
        tvinput =findViewById(R.id.tvinput);
        tvoutput =findViewById(R.id.tvoutput);
 btnClear.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
        tvinput.setText("");
        tvoutput.setText("");
     }
 });
btn0.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        process =tvinput.getText().toString();
        tvinput.setText(process+"0");
    }
});
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"1");
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"2");
            }
        });
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"3");
            }
        });
        btn4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"4");
            }
        });
        btn5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"5");
            }
        });
        btn6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"6");
            }
        });
        btn7.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"7");
            }
        });
        btn8.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"8");
            }
        });
        btn9.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"9");
            }
        });
        btnMultiplication.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"x");
            }
        });
        btnAddition.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"+");
            }
        });
        btnMinus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"-");
            }
        });
        btnDivide.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"÷");
            }
        });
        btnPercent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+"%");
            }
        });
        btnDot.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                process =tvinput.getText().toString();
                tvinput.setText(process+".");
            }
        });
        btnBracket.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(checkbracket)
                {
                    process =tvinput.getText().toString();
                    tvinput.setText(process+")");
                    checkbracket=false;
                }
                else
                    {
                        process =tvinput.getText().toString();
                        tvinput.setText(process+"(");
                        checkbracket=true;
                    }
            }
        });
        btnEqual.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            process =tvinput.getText().toString();
            process =process.replaceAll("x","*");
            process =process.replaceAll("%","/100");
            process =process.replaceAll("÷","/");
                Context rhino = Context.enter();
                rhino.setOptimizationLevel(-1);
                String finalresult="";
                try {

                    Scriptable scriptable = rhino.initStandardObjects();
                    finalresult=rhino.evaluateString(scriptable,process,"javascript",1,null).toString();
                    }
                catch (Exception e)
                {
                    finalresult="0";
                }
                tvoutput.setText(finalresult);
            }
        });
    }
}

XML Source Code:

Below XML code for Connect the two file input.xml and buttons.xml in activity_main.xmlactivity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:background="@color/white">

    <include
        layout="@layout/input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <include
            layout="@layout/buttons"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            />
    </RelativeLayout>
</LinearLayout>
Buttons Creations:buttons.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="match_parent"
    android:layout_width="match_parent">
 <GridLayout
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:columnCount="6"
     android:rowCount="5">

     <Button
         android:id="@+id/btnclear"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="0"
         android:layout_column="0"
         android:text="C"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnBracket"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="0"
         android:layout_column="1"
         android:text="()"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnPercent"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="0"
         android:layout_column="2"
         android:text="%"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnDivide"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="0"
         android:layout_column="3"
         android:text="÷"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/blue"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btn7"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="1"
         android:layout_column="0"
         android:text="7"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btn8"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="1"
         android:layout_column="1"
         android:text="8"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />

     <Button
         android:id="@+id/btn9"
         android:layout_width="wrap_content"
         android:layout_height="100dp"
         android:layout_row="1"
         android:layout_column="2"
         android:background="@color/white"
         android:fontFamily="@font/got"
         android:text="9"
         android:textColor="@color/black"
         android:textSize="25sp" />

     <Button
         android:id="@+id/btnMultiply"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="1"
         android:layout_column="3"
         android:text="x"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/blue"
         android:fontFamily="@font/got"
         />
     <Button
     android:id="@+id/btn4"
     android:layout_height="100dp"
     android:layout_width="wrap_content"
     android:layout_row="2"
     android:layout_column="0"
     android:text="4"
     android:textSize="25sp"
     android:background="@color/white"
     android:textColor="@color/black"
     android:fontFamily="@font/got"
     />
     <Button
         android:id="@+id/btn5"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="2"
         android:layout_column="1"
         android:text="5"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btn6"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="2"
         android:layout_column="2"
         android:text="6"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnSubtraction"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="2"
         android:layout_column="3"
         android:text="-"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/blue"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btn1"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="3"
         android:layout_column="0"
         android:text="1"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />

     <Button
         android:id="@+id/btn2"
         android:layout_width="wrap_content"
         android:layout_height="100dp"
         android:layout_row="3"
         android:layout_column="1"
         android:background="@color/white"
         android:fontFamily="@font/got"
         android:text="2"
         android:textColor="@color/black"
         android:textSize="25sp" />

     <Button
         android:id="@+id/btn3"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="3"
         android:layout_column="2"
         android:text="3"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnAddition"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="3"
         android:layout_column="3"
         android:text="+"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/blue"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btn0"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="4"
         android:layout_column="0"
         android:text="0"
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnDot"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="4"
         android:layout_column="1"
         android:layout_columnSpan="2"
         android:layout_columnWeight="1"
         android:text="."
         android:textSize="25sp"
         android:background="@color/white"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
     <Button
         android:id="@+id/btnEqual"
         android:layout_height="100dp"
         android:layout_width="wrap_content"
         android:layout_row="4"
         android:layout_column="3"
         android:text="="
         android:textSize="25sp"
         android:background="@color/blue"
         android:textColor="@color/black"
         android:fontFamily="@font/got"
         />
 </GridLayout>
</RelativeLayout>

Input and Output Text Box Creation:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:background="@color/white"
    xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/tvinput"
    android:text=""
    android:textSize="30dp"
    android:textColor="@color/black"
    android:padding="20dp"
    android:gravity="end"
    android:fontFamily="@font/got"
    />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tvoutput"
        android:text=""
        android:textSize="30dp"
        android:textColor="@color/black"
        android:padding="20dp"
        android:gravity="end"
        />
</LinearLayout>AndroidManifest(File):<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.calculator_01">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>
Click on below link: 
https://youtu.be/rJhomr8b9c4
Android Studio Tool Download link given below:
https://developer.android.com/studio
Channel link:
https://www.youtube.com/channel/UCX1KgUr3ZA6cCR81qGGpA6g?sub_confirmation=1