Create a Simple Sum Application Use in Android

This code snippet is for a good Usefull app.I am first created in this app. A student firstly study in this type of app.

Step 1: Install android studio and sdk.

Step 2: Open the adroid studio after design the app use this code.

Step 3: Write a java code in this app use to this code.

Java Code:

package com.example.sreenath.sum1;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.*;
public class MainActivity extends Activity
{
EditText txtNum1;
EditText txtNum2;
EditText txtTotal;
Button btnCompute;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtNum1 = (EditText) findViewById(R.id.editText1);
txtNum2 = (EditText) findViewById(R.id.editText2);
txtTotal = (EditText) findViewById(R.id.editText3);
btnCompute = (Button) findViewById(R.id.button1);
btnCompute.setOnClickListener(new ClickButton());
}
private class ClickButton implements onClickListener
{
public void onClick(View v)
{
int x = Integer.parseInt(txtNum1.getText().toString());
int y = Integer.parseInt(txtNum2.getText().toString());
int total = x + y;
txtTotal.setText(Integer.toString(total));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings)
{
return true;
}
return super.onOptionsItemSelected(item);
}
}

XML Code:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity" android:id="@+id/sree">
<EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/editText1" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="41dp" android:layout_marginStart="41dp" android:layout_marginTop="94dp" />
<EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/editText2" android:layout_below="@+id/editText1" android:layout_alignLeft="@+id/editText1" android:layout_alignStart="@+id/editText1" android:layout_marginTop="47dp" />
<EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/editText3" android:layout_below="@+id/editText2" android:layout_alignLeft="@+id/editText2" android:layout_alignStart="@+id/editText2" android:layout_marginTop="65dp" />
<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="SUM" android:id="@+id/button1" android:layout_below="@+id/editText3" android:layout_centerHorizontal="true" android:layout_marginTop="54dp" />
</RelativeLayout>

Step 4: Run the application use to emulator.

Step 5: Create a AVD.

Successfully complted the your sum application.Thank you all.