Android App Java Script: calculator

I recently made a CGPA Calculator app in which each sem was separated as a different class.

I'll post the code for one class (Semester 3) and it's xml. Follow the same procedures for the rest.

Pick up the app here:https://play.google.com/store/apps/details?id=com.psiuol21.cgpa

Java Code

package com.example.cgpa;

import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.psiuol21.cgpa.R;

public class S3Activity extends ActionBarActivity {
EditText emII,ecskills,pscp,co,stld,edc,pgmlab,ldlab,sgpatext;
TextView emIIt,ecskillst,pscpt,cot,stldt,edct,pgmlabt,ldlabt;
float sgpa,temp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getActionBar().hide();
Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/FARRAY.otf");
setContentView(R.layout.activity_s3);
emIIt = (TextView) findViewById(R.id.emII);
ecskillst= (TextView) findViewById(R.id.Economics);
pscpt= (TextView) findViewById(R.id.PSCP);
cot= (TextView) findViewById(R.id.CO);
stldt= (TextView) findViewById(R.id.STLD);
edct= (TextView) findViewById(R.id.EDC);
pgmlabt= (TextView) findViewById(R.id.Programminglab);
ldlabt= (TextView) findViewById(R.id.LogicDesignlab);

emIIt.setTypeface(tf);
ecskillst.setTypeface(tf);
pscpt.setTypeface(tf);
cot.setTypeface(tf);
stldt.setTypeface(tf);
edct.setTypeface(tf);
pgmlabt.setTypeface(tf);
ldlabt.setTypeface(tf);

emII=(EditText)findViewById(R.id.emIImarks);
ecskills=(EditText)findViewById(R.id.Economicsmarks);
pscp=(EditText)findViewById(R.id.PSCPmarks);
co=(EditText)findViewById(R.id.COmarks);
stld=(EditText)findViewById(R.id.STLDmarks);
edc=(EditText)findViewById(R.id.EDCmarks);
pgmlab=(EditText)findViewById(R.id.Programminglabmarks);
ldlab=(EditText)findViewById(R.id.LogicDesignlabmarks);

}

public float grade(EditText x)
{
int y=Integer.parseInt(x.getText().toString());
if(y>=136)
return 10;
else if(y>=121)
return 9;
else if(y>=106)
return 8;
else if(y>=91)
return 7;
else if(y>=83)
return 6;
else if(y>=75)
return (float) 5.5;
else
return 0;

}

public void calculate(View v)
{

if(emII.getText().toString().equals("") ||
ecskills.getText().toString().equals("") ||
pscp.getText().toString().equals("") ||
co.getText().toString().equals("") ||
stld.getText().toString().equals("") ||
edc.getText().toString().equals("") ||
pgmlab.getText().toString().equals("") ||
ldlab.getText().toString().equals(""))
Toast.makeText(getApplicationContext(),"Please enter all the fields", Toast.LENGTH_LONG).show();
else
{
Toast.makeText(getApplicationContext(), "Calculating", Toast.LENGTH_SHORT).show();
//sgpatext=(EditText)findViewById(R.id.sgpa);

temp=(4*(grade(emII)+grade(ecskills)+grade(pscp)+grade(co)+grade(stld)+grade(edc)))+2*(grade(pgmlab)+grade(ldlab));
sgpa=temp/28;
//Toast.makeText(getApplicationContext(), sgpa+"", Toast.LENGTH_SHORT).show();
// sgpatext.setText(sgpa+"");
Intent myintent=new Intent(S3Activity.this, Sgpacalc.class).putExtra("S3marks", sgpa);
startActivity(myintent);
}

//Log.d(TAG, "Sending data to status activity intent: " +data);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.s3, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}

/**
* A placeholder fragment containing a simple view.
*/

}

XML Code

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/container"

android:layout_width="match_parent"

android:layout_height="fill_parent"

tools:context="com.example.cgpa.S3Activity"

tools:ignore="MergeRootFrame"

android:background="@drawable/androidback" >

<RelativeLayout

android:layout_width="match_parent"

android:layout_height="664dp" >

<TextView

android:id="@+id/emII"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Engineering Maths II"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF" />

<EditText

android:id="@+id/emIImarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/emII"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" />

<TextView

android:id="@+id/Economics"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/emIImarks"

android:text="Economics and Comm Skills"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF"/>

<EditText

android:id="@+id/Economicsmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/Economics"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" >

</EditText>

<TextView

android:id="@+id/PSCP"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/Economicsmarks"

android:text="Computer Programming"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF" />

<EditText

android:id="@+id/PSCPmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/PSCP"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF"/>

<TextView

android:id="@+id/CO"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/PSCPmarks"

android:text="Computer Organization"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF" />

<EditText

android:id="@+id/COmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/CO"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF"/>

<TextView

android:id="@+id/STLD"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/COmarks"

android:text="Switching Theory"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF" />

<EditText

android:id="@+id/STLDmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/STLD"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" />

<TextView

android:id="@+id/EDC"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/STLDmarks"

android:text="Electronic Devices and Circuits"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF" />

<EditText

android:id="@+id/EDCmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/EDC"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" />

<TextView

android:id="@+id/Programminglab"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/EDCmarks"

android:text="Programming Lab"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF"/>

<EditText

android:id="@+id/Programminglabmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/Programminglab"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" />

<TextView

android:id="@+id/LogicDesignlab"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/Programminglabmarks"

android:text="Logic Design Lab"

android:textAppearance="?android:attr/textAppearanceMedium"

android:textColor="#FFFFFF"/>

<EditText

android:id="@+id/LogicDesignlabmarks"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/LogicDesignlab"

android:ems="10"

android:inputType="number"

android:textColor="#FFFFFF" />

<ImageButton

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/LogicDesignlabmarks"

android:layout_centerHorizontal="true"

android:background="@null"

android:onClick="calculate"

android:src="@drawable/calc" />

</RelativeLayout>

</ScrollView>

This is the java file for a resistance calculator. I simply used 4 spinners to select the color values. It'll calculate the resistance value on clicking submit. I'll upload the XML file on request.

package com.example.resistancecalcu;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends Activity {
String band1,band2,band3,band4;
Spinner spinner1,spinner2,spinner3,spinner4;
TextView tv;
int a,b,c,d,temp,x,p=0;
String let;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner1=(Spinner) findViewById(R.id.spinner1);
tv=(TextView)findViewById(R.id.textView1);
spinner2=(Spinner) findViewById(R.id.spinner2);
spinner3=(Spinner) findViewById(R.id.spinner3);
spinner4=(Spinner) findViewById(R.id.spinner4);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.colors, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(this,
R.array.fourth, android.R.layout.simple_spinner_item);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter);
spinner2.setAdapter(adapter);
spinner3.setAdapter(adapter);
spinner4.setAdapter(adapter1);

}
public void value(View v)
{
band1=spinner1.getSelectedItem().toString();
band2=spinner2.getSelectedItem().toString();
band3=spinner3.getSelectedItem().toString();
band4=spinner4.getSelectedItem().toString();
if(band1.equals("Black"))
a=0;
else if(band1.equals("Brown"))
a=1;
else if(band1.equals("Red"))
a=2;
else if(band1.equals("Orange"))
a=3;
else if(band1.equals("Yellow"))
a=4;
else if(band1.equals("Green"))
a=5;
else if(band1.equals("Blue"))
a=6;
else if(band1.equals("Violet"))
a=7;
else if(band1.equals("Grey"))
a=8;
else
a=9;
if(band2.equals("Black"))
b=0;
else if(band2.equals("Brown"))
b=1;
else if(band2.equals("Red"))
b=2;
else if(band2.equals("Orange"))
b=3;
else if(band2.equals("Yellow"))
b=4;
else if(band2.equals("Green"))
b=5;
else if(band2.equals("Blue"))
b=6;
else if(band2.equals("Violet"))
b=7;
else if(band2.equals("Grey"))
b=8;
else
b=9;

temp=a*10+b;
if(band3.equals("Black"))
{
c=0;
x=1;
let="";

}
else if(band3.equals("Brown"))
{
c=1;
x=10;
let="";

}
else if(band3.equals("Red"))
{
c=2;
x=100;
let="";
}
else if(band3.equals("Orange"))
{
c=3;
x=1;
let="K";
}
else if(band3.equals("Yellow"))
{
c=4;
x=10;
let="K";
}
else if(band3.equals("Green"))
{
c=5;
x=100;
let="K";
}
else if(band3.equals("Blue"))
{
c=6;
x=1;
let="M";
}
else if(band3.equals("Violet"))
{
c=7;
x=10;
let="M";
}
else if(band3.equals("Grey"))
{
c=8;
x=100;
let="M";
}
else
{
c=9;
x=1;
let="M";
}
if(band4.equals("Silver"))
{
p=10;
}
else if(band4.equals("Gold"))
{
p=5;
}

if(band4.equals("No color"))
tv.setText(""+temp*x+" "+let+" ohm");
else
tv.setText(""+temp*x+" "+let+" ohm"+" "+p+"%");

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}

}

Android App Java Script

Sunday, 8 February 2015

CGPA Calculator

Saturday, 16 August 2014

Resistance Calculator App