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projectbcamca
Wednesday, December 11, 2024
android lab programs
1. Radio Button Aim: Write a Program to select gender using radio button activity_main.xml
MainActivity.java package com.example.myapplication; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Toast;import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.widget.RelativeLayout; import android.widget.RelativeLayout; public class MainActivity extends AppCompatActivity { Button but; RadioGroup rgroup; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); but=(Button) findViewById(R.id.button); rgroup=(RadioGroup) findViewById(R.id.radiogrp); but.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int selected=rgroup.getCheckedRadioButtonId(); RadioButton radio=(RadioButton) findViewById(selected); Toast.makeText(MainActivity.this,"You selected : "+radio.getText(),Toast.LENGTH_LONG).show(); } }); } } Output 2. Addition of two Numbers Aim: Write a program to add two numbers activity_main.xml
MainActivity.java package com.example.myapplication; import android.widget.EditText; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import android.widget.TextView; import android.os.Bundle; import android.widget.RelativeLayout; import android.widget.RelativeLayout; public class MainActivity extends AppCompatActivity { EditText firstnum,secondnum; TextView r; Button bt; double a,b,c; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); firstnum=(EditText) findViewById(R.id.first); secondnum=(EditText) findViewById(R.id.second); bt=(Button) findViewById(R.id.buttonadd); r=(TextView) findViewById(R.id.result); bt.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { a=Double.parseDouble(firstnum.getText().toString()); b=Double.parseDouble(secondnum.getText().toString()); c=a+b; r.setText("Sum="+c); } }); } Output 3. Alert Box Aim: Write a program to Display an alert box with OK and Cancel activity_main.xml
MainActivity.java package com.example.myapplication; import android.content.DialogInterface; import android.widget.EditText; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import android.widget.TextView; import android.os.Bundle; import android.widget.RelativeLayout; import android.widget.RelativeLayout; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { Button but; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); but=(Button) findViewById(R.id.button); but.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { AlertDialog.Builder b= new AlertDialog.Builder(MainActivity.this); b.setTitle("Alert"); b.setMessage("Are you sure ?"); b.setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { Toast.makeText(MainActivity.this, "You Clicked OK", Toast.LENGTH_SHORT).show(); } }); b.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { Toast.makeText(MainActivity.this, "You Clicked Cancel", Toast.LENGTH_SHORT).show(); } }); AlertDialog d = b.create(); d.show(); } }); } } 4. Multiplication table Aim: Write a program to display multiplication table of a given number activity_main.xml
MainActivity.java package com.example.myapplication43; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android . os . Bundle ; import android . view . View ; import android . widget . Button ; import android . widget . EditText ; import android . widget . TextView ; public class MainActivity extends AppCompatActivity { TextView txtres ; Button but ; EditText edtnum ; @Override protected void onCreate ( Bundle savedInstanceState ) { super . onCreate ( savedInstanceState ) ; setContentView ( R . layout . activity_main ) ; txtres = findViewById ( R . id . textViewResult ) ; edtnum = findViewById ( R . id . editTextNumber ) ; but = findViewById ( R . id . button ) ; but . setOnClickListener ( new View . OnClickListener () { @Override public void onClick ( View v ) { int num = Integer . parseInt ( edtnum . getText () . toString () ) ; txtres . setText ( " " ) ; for ( int i =1; i <11; i ++) { txtres . append ( i + " * " + num + " = " + i* num + " \n" ) ; } } }) ; } } Output 5. Change the Background Color Aim: Write a program to Change the Background colour of the Activity activity_main.xml
MainActivity.java package com.example.myapplicationbgcolor; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.graphics.Color; import android.view.View; import android.widget.Button; import android.widget.RelativeLayout; public class MainActivity extends AppCompatActivity { Button but , butc; RelativeLayout rel; @Override protected void onCreate ( Bundle savedInstanceState ) { super.onCreate ( savedInstanceState ); setContentView (R.layout.activity_main ); but = findViewById (R.id.button); butc = findViewById (R.id.butclear); rel = findViewById (R.id.rel); but.setOnClickListener (new View.OnClickListener() { @Override public void onClick ( View v ) { rel.setBackgroundColor (Color.MAGENTA); } }) ; butc.setOnClickListener( new View.OnClickListener() { @Override public void onClick ( View v ) { rel.setBackgroundColor(Color.WHITE); } }); } Output 6. Spinner Aim: Write a Program to spin the six items activity_main.xml
MainActivity.java package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.widget.Toast; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { Spinner spin ; String[] items = {"asp.net ","java" ,"rdbms","android","android lab "}; @Override protected void onCreate ( Bundle savedInstanceState ) { super . onCreate (savedInstanceState) ; setContentView (R.layout.activity_main) ; spin=findViewById(R.id.spinner) ; spin.setOnItemSelectedListener (new AdapterView. OnItemSelectedListener() { @Override public void onItemSelected ( AdapterView parent , View view , int position , long id ) { Toast . makeText ( MainActivity . this , " Selected Item "+ items [ position ] , Toast . LENGTH_SHORT ) . show () ; } @Override public void onNothingSelected ( AdapterView parent ) { Toast . makeText ( MainActivity . this , " No item selected " , Toast . LENGTH_SHORT ) . show () ; } }) ; ArrayAdapter < String > adt = new ArrayAdapter < String >( this , android . R . layout . simple_list_item_1 , items ) ; spin . setAdapter ( adt ) ; } } Output 7. Fetch data Aim: Fetch data from an Edit Text and display it in a Text View activity_main.xml
MainActivity.java package com.example.myapplicationfetchdata; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText ; import android.widget.TextView ; public class MainActivity extends AppCompatActivity { EditText edt; Button but; TextView txt; @Override protected void onCreate ( Bundle savedInstanceState ) { super.onCreate (savedInstanceState ) ; setContentView (R.layout.activity_main ) ; edt = findViewById ( R.id.editText ) ; but = findViewById ( R.id.button ); txt = findViewById ( R.id.text_display ) ; but.setOnClickListener (new View.OnClickListener() { @Override public void onClick ( View v ) { txt.setText ( edt.getText().toString()); } }) ; } } Output 8. Change the background Image Aim: Write a program to Change the Background image activity_main.xml
MainActivity.java com.example.myapplicationchangebgimage; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android . graphics . Color ; import android . os . Bundle ; import android . view . View ; import android . widget . Button ; import android . widget . RelativeLayout ; public class MainActivity extends AppCompatActivity { Button but; RelativeLayout rel; @Override protected void onCreate ( Bundle savedInstanceState ) { super.onCreate( savedInstanceState ) ; setContentView ( R.layout.activity_main); but = findViewById (R.id.button); rel = findViewById (R.id.rel) ; but.setOnClickListener ( new View.OnClickListener() { @Override public void onClick ( View v ) { rel.setBackgroundResource (R.drawable.sujeercolor ) ; } }) ; } } Output 9. Get current time and date Aim: Write a program to get current time and date activity_main.xml
MainActivity.java package com.example.myapplicationdateandtime; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.annotation.TargetApi; import android.os.Build; import android.os.Bundle; import android.widget.TextView; import java.text.SimpleDateFormat; import java.util.Date; public class MainActivity extends AppCompatActivity { @TargetApi(Build.VERSION_CODES.O) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView textView=findViewById(R.id.date); SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd G 'at' HH:mm:ss z"); String currentDateandTime = sdf.format(new Date()); textView.setText(currentDateandTime); } } Output 10. Marquee Text Aim: Write a program to make a marquee text activity_main.xml
MainActivity.java package com.example.myapplicationmarquee; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.os.Bundle; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView txt = findViewById(R.id.text); txt.setSelected(true); } } Output
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