Android Java Code: Creating a Toast Message and Handling User Input | Exercises Commercial Law

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package com.example.androidlifecycle;

import android.os.Bundle; import android.app.Activity;

import android.view.Menu;import android.widget.Toast;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Toast.makeText(getApplicationContext(), "I am create method", Toast.LENGTH_LONG).show();

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Java Code:

package com.example.addition; import android.os.Bundle;

import android.app.Activity; import android.view.Menu;

import android.view.View; import android.view.View.OnClickListener;

import android.widget.Button; import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

private EditText edittext1,edittext2;

private Button Btn_Add ;

private Button Btn_Sub ;

private Button Btn_Mul ;

private Button Btn_Div ;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

addListenerOnButton(); }

public void addListenerOnButton(){

edittext1=(EditText)findViewById(R.id.editText1);

edittext2=(EditText)findViewById(R.id.editText2);

Btn_Add=(Button)findViewById(R.id.button1);

Btn_Sub=(Button)findViewById(R.id.button2);

Btn_Mul=(Button)findViewById(R.id.button3);

Btn_Div=(Button)findViewById(R.id.button4);

Btn_Add.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View view) {

String value1=edittext1.getText().toString();

String value2=edittext2.getText().toString();

int a=Integer.parseInt(value1);

int b=Integer.parseInt(value2); int sum=a+b;

Toast.makeText(getApplicationContext(),String.valueOf(sum),Toast.LENGTH_LONG).show();

REPEAT***************************4

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu); return true;

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package com.example.androidlifecycle; import android.os.Bundle; import android.app.Activity; import android.view.Menu;import android.widget.Toast; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toast.makeText(getApplicationContext(), "I am create method", Toast.LENGTH_LONG).show(); EXXXXXXXXXXXXX Java Code: package com.example.addition; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private EditText edittext1,edittext2; private Button Btn_Add ; private Button Btn_Sub ; private Button Btn_Mul ; private Button Btn_Div ; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout. activity_main ); addListenerOnButton(); } public void addListenerOnButton(){ edittext1=(EditText)findViewById(R.id. editText1 ); edittext2=(EditText)findViewById(R.id. editText2 ); Btn_Add=(Button)findViewById(R.id. button1 ); Btn_Sub=(Button)findViewById(R.id. button2 ); Btn_Mul=(Button)findViewById(R.id. button3 ); Btn_Div=(Button)findViewById(R.id. button4 ); Btn_Add.setOnClickListener( new OnClickListener(){ @Override public void onClick(View view) { String value1=edittext1.getText().toString(); String value2=edittext2.getText().toString(); int a=Integer. parseInt (value1); int b=Integer. parseInt (value2); int sum=a+b; Toast. makeText (getApplicationContext(),String. valueOf (sum),Toast. LENGTH_LONG ).show(); REPEAT*************************** public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu. main , menu); return true ;

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:paddingBottom= "@dimen/activity_vertical_margin" android:paddingLeft= "@dimen/activity_horizontal_margin" android:paddingRight= "@dimen/activity_horizontal_margin" android:paddingTop= "@dimen/activity_vertical_margin" tools:context= ".MainActivity" > <EditText android:id= "@+id/editText1" android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:layout_alignParentLeft= "true" android:layout_alignParentTop= "true" android:layout_marginLeft= "53dp" android:layout_marginTop= "34dp" android:ems= "10" android:inputType= "number" > REPEAT <Button android:id= "@+id/button1" android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:layout_alignLeft= "@+id/editText2" android:layout_alignParentBottom= "true" android:layout_marginBottom= "114dp" android:layout_marginLeft= "17dp" android:text= "@string/Btn_Add" /> String XML:

Addition Settings Hello world! Add Sub Mul

android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_marginRight="20dp" android:ems="10"/> 2222222 2222222

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Android Java Code: Creating a Toast Message and Handling User Input, Exercises of Commercial Law

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