Android Tutorial with Examples (Projects)

 

Learn Android with Examples: The best way to learn Android development is by practicing (or developing) some basic projects. Our Android Tutorial is designed for students as well as developers having projects from basic to advanced levels.

Android Tutorial: Index

1. How to Install and Set up Android Studio on Windows?
2. How to Install Android Virtual Device (AVD)?
3. How to Create Virtual Device (Emulator) in Android Studio?
4. How to Start/Create a New Project in Android Studio?
5. How to Create a New Activity in Android Studio?
6. How to Use Full Screen Activity in Android Studio?
7. How to use bundle class for passing data of any type in Android?
8. Activity Lifecycle in Android with an Example App
9. How to Build Your First Android Application?
10. Android code to make call from your own application
11. Android - setOnClickListener Method, how does it work?
12. Android - How to get value of EditText?
13. Android - setOnCheckedChangeListener for checkbox
14. Android - setOnCheckedChangeListener for Radio Buttons
15. Android - Signup and Sign in (login) and Sign out (logout) with codes
16. Initiate/Display an Analog Clock in Android (With Codes)
17. Android String Resources: Define string for whole project?
18. Android Dialogs with Examples
19. Create Simple User Form in Android (Example with Codes)
20. GridView in Android with Example
21. ImageButton in Android with Example
22. ListView in Android with Example
23. Intent in Android with Example
24. Linear Layout in Android with Example
25. How to Create Linear Orientation Layout of an Android App?
26. Grid Layout in Android with Example
27. Relative Layout in Android with Example
28. ImageView in Android with Example
29. How to fill a ListView with Class Objects in Android?
30. Tabbed Activity in Android with Example
31. Android Implicit Intent Example with Code
32. Android Explicit Intent (Move from One Activity to Another)
33. How to Connect Android App to Web Server?
34. How to Send Data to Server through an Android Application?
35. Save/Read Data to/from Internal Storage Example in Android
36. Android code to Read and Save Data from/to External Storage
37. An example of Simple Toast in Android
38. Toast the result of dialog in Android
39. Pre-defined Login activity in Android Studio
40. Android - StartActivityForResult Method
41. Android - Independent view (1) setOnClickListener
42. Android - List view - setOnItemClickListener
43. Android - Set Listener on item of a list setOnClickListener
44. Android ACTION_SEND event Example with Source Codes
45. How to zoom the image in Android (animation)
46. How to know Charging mode in Android?
47. Showing list of all paired devices in Android
48. BatteryManager and its properties in Android?
49. How to use ClipboardManager to ClipData in Android?
50. How to use Custom made fonts in Android?
51. Implementing gestures in Android
52. Rotate the image in both clockwise and anti-clockwise direction in Android (animation)
53. Fade image for a particular duration in Android (animation)
54. Blink image for an infinite count in Android (animation)
55. Move image on a particular axis in Android (animation)
56. Slide image to XScale in Android (animation)
57. Android Popup Menu Example
58. How to show audio mode of device in Android?
59. How to set your device on Ring/Normal mode in Android?
60. How to set your device on Vibrate mode in Android?
61. Change the device mode on Silent in Android?
62. Implement auto complete in Android
63. Generate backup on Google backup services in Android
64. How to check and turn on the device Bluetooth in Android?
65. How to get co-ordinates of touch points on screen in Android?
66. Android - Context Menu Example
67. How to get motion touch co-ordinates in Android?
68. How to change image view color using bitmap in Android?
69. Write file using FileOutputStream class in Android
70. Implement process circle in Android
71. How to generate a notification in an Android device?
72. Progress Bar in Android Application
73. How to share something on social media from your Android Device?
74. Switching between two images in Android
75. Create Webview inside Android Application
76. Make a call by using Intent.ACTION_CALL in Android
77. Compose mail from your Android Device
78. How to parse XML file in Android?
79. How to Switch on WIFI service in Android?
80. Save data using SharedPreferences in Android
81. How to send SMS in android using Intent?
82. How to use Services in Android?
83. Android - Option Menu Example
84. How to work with scrolling activity in Android?
85. What is Navigation Drawer in Android?
86. Map activity in Android Studio
87. Settings Activity in Android Studio
88. Fade In Animation Example in Android
89. Android Services Example
90. Android Button Example Code
91. Android ImageButton Example Code
92. Android Button Customization Example
93. Android Example to Click Photo or Select Image from Gallery
94. Android | How to declare string in Java with Android?
95. Android | Application to Display All Available WiFi Network and Connect with Specific Network
96. Android - Detect on which Network (WiFi or Mobile Data) Mobile is connected

10. Login & Logout Features in Android Application

 

Login & Logout Features in Android Application

File Name: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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="com.example.abbu.login_logout.MainActivity">

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="187dp"
        android:id="@+id/editTextPass"
        android:hint="password" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:ems="10"
        android:layout_alignBottom="@+id/editTextPass"
        android:layout_alignEnd="@+id/editTextPass"
        android:layout_marginBottom="80dp"
        android:id="@+id/editTextUser"
        android:hint="username" />

    <Button
        android:text="Login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editTextPass"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="72dp"
        android:id="@+id/button" />
</RelativeLayout>

File Name: MainActivity.java

package com.example.abbu.login_logout;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import static android.R.attr.value;

public class MainActivity extends AppCompatActivity {

    EditText username, password;
    Button login;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        username = (EditText) findViewById(R.id.editTextUser);
        password = (EditText) findViewById(R.id.editTextPass);
        login = (Button) findViewById(R.id.button);

        login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(username.getText().toString().equals("admin") &&
                        password.getText().toString().equals("admin")){
                    Intent i = new Intent(MainActivity.this.getApplicationContext(),
                            Logout.class);
                    i.putExtra("message", value);
                    startActivity(i);
                }
                else{
                    Toast.makeText(MainActivity.this, "Invalid Details",
                            Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

File Name: logout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:text="Logout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="125dp"
        android:id="@+id/buttonLogout" />
</RelativeLayout>

File Name: Logout.java

package com.example.abbu.login_logout;

import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import static android.content.ContentValues.TAG;

/**
 * Created by Abbu on 4/15/2017.
 */

public class Logout extends MainActivity {

    Button Logout;



    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.logout);
        Logout = (Button) findViewById(R.id.buttonLogout);

        Intent in = getIntent();
        String string = in.getStringExtra("message");
        Logout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(Logout.this);
                builder.setTitle("Confirmation PopUp!").
                        setMessage("You sure, that you want to logout?");
                builder.setPositiveButton("Yes",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                Intent i = new Intent(getApplicationContext(),
                                        MainActivity.class);
                                startActivity(i);
                            }
                        });
                builder.setNegativeButton("No",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.cancel();
                            }
                        });
                AlertDialog alert11 = builder.create();
                alert11.show();
            }
        });
    }
}

Output:
activity_main.xml
After clicking on LOGIN Button, logout.xml will apear.
After_Successful_Login (logout.xml)
Now, when you click on LOGOUT Button, a confirmation popup (dialog box) will appear.




Logout_Confirmation
After clicking on YES in the confirmation popup, we'll come back to activity_main.xml


After_Logout

9. Login Application in Android

 

Login Application in Android

FileName: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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="com.example.abbu.login_page.MainActivity">

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="187dp"
        android:id="@+id/editTextPass"
        android:hint="password" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:ems="10"
        android:layout_alignBottom="@+id/editTextPass"
        android:layout_alignEnd="@+id/editTextPass"
        android:layout_marginBottom="80dp"
        android:id="@+id/editTextUser"
        android:hint="username" />

    <Button
        android:text="Login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editTextPass"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="72dp"
        android:id="@+id/button" />
</RelativeLayout>

FileName: MainActivity.java

package com.example.abbu.login_page;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    EditText username, password;
    Button login;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        username = (EditText) findViewById(R.id.editTextUser);
        password = (EditText) findViewById(R.id.editTextPass);
        login = (Button) findViewById(R.id.button);

        login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(username.getText().toString().equals("admin") &&
                        password.getText().toString().equals("admin")){
                    Toast.makeText(MainActivity.this, "Welcome " +
                            username.getText().toString(),
                            Toast.LENGTH_SHORT).show();
                }
                else{
                    Toast.makeText(MainActivity.this, "Invalid Details",
                            Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

Output:
activity_main.xml
After Successful Login
After unsuccessful Login

8. Three Buttons Vertically Aligned & Background Color Usage in Android

 

Three Buttons Vertically Aligned & Background Color Usage in Android

FileName: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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="com.example.abbu.button_color.MainActivity">

    <Button
        android:text="GAMBOGE"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonPatina"
        android:layout_alignStart="@+id/buttonPatina"
        android:layout_marginTop="30dp"
        android:id="@+id/buttonGamboge" />

    <Button
        android:text="AMBER"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonGamboge"
        android:layout_alignStart="@+id/buttonGamboge"
        android:layout_marginTop="30dp"
        android:id="@+id/buttonAmber" />

    <Button
        android:text="PATINA"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/buttonPatina"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

FileName: MainActivity.java

package com.example.abbu.button_color;

import android.graphics.Color;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;


public class MainActivity extends AppCompatActivity {

    Button btn1,btn2,btn3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn1 = (Button) findViewById(R.id.buttonPatina);
        btn2 = (Button) findViewById(R.id.buttonGamboge);
        btn3 = (Button) findViewById(R.id.buttonAmber);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                RelativeLayout rl = (RelativeLayout)findViewById(R.id.activity_main);
                    rl.setBackgroundColor(Color.parseColor("#407A52"));
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                RelativeLayout rl = (RelativeLayout)findViewById(R.id.activity_main);
                rl.setBackgroundColor(Color.parseColor("#FFB61E"));
            }
        });

        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                RelativeLayout rl = (RelativeLayout)findViewById(R.id.activity_main);
                rl.setBackgroundColor(Color.parseColor("#CA6924"));
            }
        });
    }
}

Output:
Three Buttons Vertically Aligned & Background Color Usage in Android
After clicking on PATINA Button, the background color changes to:
PATINA (#407A52)
After clicking on GAMBOGE Button, the background color changes to:

GAMBOGE (#FFB61E)
After clicking on AMBER Button, the background color changes to:



AMBER (#CA6924)

7. Radio Button, ImageView and Toast Usage in Android

 

Radio Button, ImageView and Toast Usage in Android

File Name: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 

    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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="com.example.abbu.radio_power.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enquire Teacher-in-Charge"
        android:id="@+id/textView" />

    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/choices"
        android:layout_below="@+id/textView"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true">

    <RadioButton
        android:text="Computer Science"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_marginStart="5dp"
        android:layout_marginTop="10dp"
        android:id="@+id/radioButtonCS" />

    <RadioButton
        android:text="Commerce"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/radioButtonCS"
        android:layout_toEndOf="@+id/textView"
        android:layout_alignParentStart="false"
        android:layout_marginStart="5dp"
        android:layout_marginTop="10dp"
        android:id="@+id/radioButtonCO" />

    <RadioButton
        android:text="Chemistry"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/radioButtonEL"
        android:layout_alignStart="@+id/radioButtonCO"
        android:layout_alignParentStart="false"
        android:layout_marginStart="5dp"
        android:layout_marginTop="10dp"
        android:id="@+id/radioButtonCH" />

    <RadioButton
        android:text="Electronics"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/radioButtonEL"
        android:layout_alignParentStart="false"
        android:layout_marginStart="5dp"
        android:layout_marginTop="10dp"
        android:layout_below="@+id/radioButtonCS"
        android:layout_alignStart="@+id/radioButtonCS" />
    

    </RadioGroup>

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:srcCompat="@mipmap/ic_launcher"
        android:id="@+id/imageView"
        android:layout_marginTop="41dp"
        android:layout_below="@+id/choices"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

File Name: MainActivity.java

package com.example.abbu.radio_power;

import android.content.res.TypedArray;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private TypedArray images;
    private ImageView itemImage;
    RadioButton rch = null;
    RadioButton rco = null;
    RadioButton rcs = null;
    RadioButton rel = null;
    RadioGroup rg = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        images = getResources().obtainTypedArray(R.array.radiobtn_image);
        itemImage = (ImageView) findViewById(R.id.imageView);
        rch = (RadioButton) findViewById(R.id.radioButtonCH);
        rco = (RadioButton) findViewById(R.id.radioButtonCO);
        rcs = (RadioButton) findViewById(R.id.radioButtonCS);
        rel = (RadioButton) findViewById(R.id.radioButtonEL);
        rg = (RadioGroup) findViewById(R.id.choices);

        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                if(checkedId == rch.getId()) {
                    itemImage.setImageResource(R.drawable.pic2);
                    Toast.makeText(MainActivity.this, "Dr. Neelu Dhir",
                            Toast.LENGTH_SHORT).show();
                }else if (checkedId == rco.getId()) {
                    itemImage.setImageResource(R.drawable.pic4);
                    Toast.makeText(MainActivity.this, "Ms. Sangeeta Relan",
                            Toast.LENGTH_SHORT).show();
                } else if (checkedId == rcs.getId()) {
                    itemImage.setImageResource(R.drawable.pic1);
                    Toast.makeText(MainActivity.this, "Dr. Vibha Gaur",
                            Toast.LENGTH_SHORT).show();
                } else {
                    itemImage.setImageResource(R.drawable.pic3);
                    Toast.makeText(MainActivity.this, "Dr. Ravneet Kaur",
                            Toast.LENGTH_SHORT).show();
                }
            }
        });
}
}

File Name: strings.xml

<resources>
    <string name="app_name">Radio_Power</string>

    <string-array name="radiobtn_image">
        <item>@drawable/pic1</item>
        <item>@drawable/pic2</item>
        <item>@drawable/pic3</item>
        <item>@drawable/pic4</item>
    </string-array>
</resources>

Output:
Radio Button, ImageView and Toast Usage in Android
Radio Button, ImageView and Toast Usage in Android