VEMU INSTITUTE OF TECHNOLOGY LAB MANUAL

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING

LAB MANUAL

Prepared By K.Dhanamjay

15A05711- MOBILE APPLICATION DEVELOPMENT LABORATORY

Regulation – R15

Year / Semester: III / II

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

INDEX

1. create an android app for GUI Components

2. create an android app for Widgets

3. create an android app for TextEdit control

4. create an android app for Checkbox

5. create an android app for Spinner Control

6. create an android app for Audio Player

7. create an android app for Video Player

8. create an android app for Radio Button

9. create an android app for linear Layout

10. create an android app for Relative Layout

11. create an android app for Radio Group

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Creating the Application by using the Activity class

(onCreate(),onStart(),onResume(),onPause(),onStop(),onDestroy(),onRestart())

Theory:

An activity represents a single screen with a user interface just like window or frame of

Java.Android activity is the subclass of ContextThemeWrapper class.

Procedure:

Step 1 : You will use Android studio to create an Android application and name it

as HelloWorld under a package com.example.helloworld as explained in the Hello World

Example chapter.

Step 2 : Modify main activity file MainActivity.java as explained below. Keep rest of the files

unchanged.

Step 3: Run the application to launch Android emulator and verify the result of the changes done

in the application.

The Log.d() method has been used to generate log messages –

Source Code:

MainActivity.java

package com.example.helloworld;

import android.os.Bundle;

import android.app.Activity;

import android.util.Log;

public class MainActivity extends Activity {

String msg = "Android : ";

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Log.d(msg, "The onCreate() event");

}

/** Called when the activity is about to become visible. */

@Override

protected void onStart() {

super.onStart();

Log.d(msg, "The onStart() event");

}

/** Called when the activity has become visible. */

@Override

protected void onResume() {

super.onResume();

Log.d(msg, "The onResume() event");

}

/** Called when another activity is taking focus. */

@Override

protected void onPause() {

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super.onPause();

Log.d(msg, "The onPause() event");

}

/** Called when the activity is no longer visible. */

@Override

protected void onStop() {

super.onStop();

Log.d(msg, "The onStop() event");

}

/** Called just before the activity is destroyed. */

@Override

public void onDestroy() {

super.onDestroy();

Log.d(msg, "The onDestroy() event");

}

An activity class loads all the UI component using the XML file available in res/layout folder

of the project. Following statement loads UI components from res/layout/activity_main.xml

file:

setContentView(R.layout.activity_main);

Every activity you define for your application must be declared in

your AndroidManifest.xml file and the main activity for your app must be declared in the

manifest with an <intent-filter> that includes the MAIN action and LAUNCHER category as

follows:

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

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:supportsRtl="true"

android:theme="@style/AppTheme">

<intent-filter>

</intent-filter>

</activity> </application> </manifest>

OUTPUT:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Create Application by Using Building Blocks for Android Application Design (Absolute

Layout).

Theory:

An Absolute Layout lets you specify exact locations (x/y coordinates) of its children. Absolute

layouts are less flexible and harder to maintain than other types of layouts without absolute

positioning.

Following is the content of the modified main activity

file src/com.example.demo/MainActivity.java.

This file can include each of the fundamental lifecycle methods.

Source Code:

MainActivity.java

package com.example.demo;

import android.os.Bundle;

import android.app.Activity;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

Following will be the content of res/layout/activity_main.xml file –

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

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<Button

android:layout_width="100dp"

android:layout_height="wrap_content"

android:text="OK"

android:layout_x="50px"

android:layout_y="361px" />

<Button

android:layout_width="100dp"

android:layout_height="wrap_content"

android:text="Cancel"

android:layout_x="225px"

android:layout_y="361px" />

</AbsoluteLayout>

Following will be the content of res/values/strings.xml to define two new constants −

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

<string name="action_settings">Settings</string>

</resources>

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Create the audio Player application

Theory:

We can play and control the audio files in android by the help of MediaPlayer class.

Here, we are going to see a simple example to play the audio file. In the next page, we will see

the example to control the audio playback like start, stop, pause etc.

Let's write the code of to play the audio file. Here, we are going to play maine.mp3 file

located inside the sdcard/Music directory.

Source code:

File: MainActivity.java

package com.example.audiomediaplayer1;

import android.media.MediaPlayer;

import android.net.Uri;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.widget.MediaController;

import android.widget.VideoView;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

MediaPlayer mp=new MediaPlayer();

try{

mp.setDataSource("/sdcard/Music/maine.mp3");//Write your location here

mp.prepare();

mp.start();

}catch(Exception e){e.printStackTrace();}

}

@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;

}

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Drag three buttons from pallete to start, stop and pause the audio play. Now the xml file

will look like this:

Source Code:

activity_main.xml:

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity" >

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentTop="true"

android:text="Audio Controller" />

<Button

android:id="@+id/button1"

style="?android:attr/buttonStyleSmall"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/textView1"

android:layout_below="@+id/textView1"

android:layout_marginTop="48dp"

android:text="start" />

<Button

android:id="@+id/button2"

style="?android:attr/buttonStyleSmall"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignTop="@+id/button1"

android:layout_toRightOf="@+id/button1"

android:text="pause" />

<Button

android:id="@+id/button3"

style="?android:attr/buttonStyleSmall"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignTop="@+id/button2"

android:layout_toRightOf="@+id/button2"

android:text="stop" />

</RelativeLayout>

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Let's write the code to start, pause and stop the audio player.

File: MainActivity.java

package com.example.audioplay;

import android.media.MediaPlayer;

import android.os.Bundle;

import android.os.Environment;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

Button start,pause,stop;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

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

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

//creating media player

final MediaPlayer mp=new MediaPlayer();

try{

//you can change the path, here path is external direc

tory(e.g. sdcard) /Music/maine.mp3

mp.setDataSource(Environment.getExternalStorageDirectory().get

Path()+"/Music/maine.mp3");

mp.prepare();

}catch(Exception e){e.printStackTrace();}

start.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

mp.start();

}

});

pause.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

mp.pause();

}

});

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stop.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

mp.stop();

}

});

}

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Creating the Application using CheckBox

Theory:

 Android CheckBox is a type of two state button either checked or unchecked.

 There can be a lot of usage of checkboxes. For example, it can be used to know the hobby

of the user, activate/deactivate the specific action etc.

 Android CheckBox class is the subclass of CompoundButton class.

 Drag the three checkboxes and one button for the layout. Now the activity_main.xml file

will look like this:

Source code:

File: activity_main.xml

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

<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"

android:layout_height="match_parent"

<CheckBox

android:id="@+id/checkBox"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Pizza"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toTopOf="parent" />

<CheckBox

android:id="@+id/checkBox2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Coffee"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toBottomOf="@+id/checkBox" />

<CheckBox

android:id="@+id/checkBox3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Burger"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toBottomOf="@+id/checkBox2" />

<Button

android:id="@+id/button"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Order"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toBottomOf="@+id/checkBox3" />

</android.support.constraint.ConstraintLayout>

File: MainActivity.java

package example.javatpoint.com.checkbox;

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import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

CheckBox pizza,coffe,burger;

Button buttonOrder;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

addListenerOnButtonClick();

}

public void addListenerOnButtonClick(){

//Getting instance of CheckBoxes and Button from the activty_main.xml file

pizza=(CheckBox)findViewById(R.id.checkBox);

coffe=(CheckBox)findViewById(R.id.checkBox2);

burger=(CheckBox)findViewById(R.id.checkBox3);

buttonOrder=(Button)findViewById(R.id.button);

//Applying the Listener on the Button click

buttonOrder.setOnClickListener(new View.OnClickListener(){

@Override

public void onClick(View view) {

int totalamount=0;

StringBuilder result=new StringBuilder();

result.append("Selected Items:");

if(pizza.isChecked()){

result.append("\nPizza 100Rs");

totalamount+=100;

}

if(coffe.isChecked()){

result.append("\nCoffe 50Rs");

totalamount+=50;

}

if(burger.isChecked()){

result.append("\nBurger 120Rs");

totalamount+=120;

}

result.append("\nTotal: "+totalamount+"Rs");

//Displaying the message on the toast

Toast.makeText(getApplicationContext(), result.toString(), Toast.LENGTH_LONG).show();

}

});

}

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Create Application by Using Building Blocks for Android Application Design (Linear Layout).

Theory:

Android LinearLayout is a view group that aligns all children in

either vertically or horizontally.

Source code:

MainActivity.java

package com.example.demo;

import android.os.Bundle;

import android.app.Activity;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

Following will be the content of res/layout/activity_main.xml file −

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

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

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<Button android:id="@+id/btnStartService"

android:layout_width="270dp"

android:layout_height="wrap_content"

android:text="start_service"/>

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<Button android:id="@+id/btnPauseService"

android:layout_width="270dp"

android:layout_height="wrap_content"

android:text="pause_service"/>

<Button android:id="@+id/btnStopService"

android:layout_width="270dp"

android:layout_height="wrap_content"

android:text="stop_service"/>

</LinearLayout>

Following will be the content of res/values/strings.xml to define two new constants −

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

<string name="app_name">HelloWorld</string>

<string name="action_settings">Settings</string>

</resources>

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Creating the application using Android RadioGroup

Theory:

In android, Radio Group is used to group one or more radio buttons into separate groups based on our

requirements.

If we group Radio Buttons using RadioGroup, at a time only one item can be selected from the group of

radio buttons. In case, if we select one radio button that belongs to a radio group will unselect all other

previously selected radio buttons within in the same group.

Initially, all the radio buttons of radio group are in unchecked state, once we select a radio button then it’s

not possible for us to uncheck it like CheckBox control.

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

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

android:layout_width="match_parent" android:layout_height="match_parent">

<RadioGroup

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical">

<RadioButton

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Java"/>

</RadioGroup>

</RelativeLayout>

Source code:

Now open an activity_main.xml file from \res\layout path and write the code like as

shown below

activity_main.xml

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

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

android:layout_width="match_parent" android:layout_height="match_parent">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="150dp"

android:layout_marginLeft="100dp"

android:textSize="18dp"

android:text="Select Your Course"

android:textStyle="bold"

android:id="@+id/txtView"/>

<RadioGroup

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical"

android:id="@+id/rdGroup"

android:layout_below="@+id/txtView">

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<RadioButton

android:id="@+id/rdbJava"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:padding="10dp"

android:layout_marginLeft="100dp"

android:text="Java"

android:onClick="onRadioButtonClicked"/>

<RadioButton

android:id="@+id/rdbPython"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:padding="10dp"

android:layout_marginLeft="100dp"

android:text="Python"

android:onClick="onRadioButtonClicked"/>

<RadioButton

android:id="@+id/rdbAndroid"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:padding="10dp"

android:layout_marginLeft="100dp"

android:text="Android"

android:onClick="onRadioButtonClicked"/>

<RadioButton

android:id="@+id/rdbAngular"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:padding="10dp"

android:layout_marginLeft="100dp"

android:text="AngularJS"

android:onClick="onRadioButtonClicked"/>

</RadioGroup>

<Button

android:id="@+id/getBtn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="100dp"

android:layout_below="@+id/rdGroup"

android:text="Get Course" />

</RelativeLayout>

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MainActivity.java

package com.tutlane.radiobuttonexample;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

RadioButton android, java, angular, python;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

android = (RadioButton)findViewById(R.id.rdbAndroid);

angular = (RadioButton)findViewById(R.id.rdbAngular);

java = (RadioButton)findViewById(R.id.rdbJava);

python = (RadioButton)findViewById(R.id.rdbPython);

Button btn = (Button)findViewById(R.id.getBtn);

btn.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

String result = "Selected Course: ";

result+=

(android.isChecked())?"Android":(angular.isChecked())?"AngularJS":(java.isChecked())?"Java":(python.is

Checked())?"Python":"";

Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();

}

});

}

public void onRadioButtonClicked(View view) {

boolean checked = ((RadioButton) view).isChecked();

String str="";

// Check which radio button was clicked

switch(view.getId()) {

case R.id.rdbAndroid:

if(checked)

str = "Android Selected";

break;

case R.id.rdbAngular:

if(checked)

str = "AngularJS Selected";

Dept of CSE Designed By K.Dhanamjay

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break;

case R.id.rdbJava:

if(checked)

str = "Java Selected";

break;

case R.id.rdbPython:

if(checked)

str = "Python Selected";

break;

}

Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();

}

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Create Application by Using Building Blocks for Android Application Design

(RelativeLayout).

Theory:

Android RelativeLayout enables you to specify how child views are positioned relative to each

other. The position of each view can be specified as relative to sibling elements or relative to the

parent.

Procedure:

Step 1

You will use Android Studio IDE to create an Android application and name it

as demo under a package com.example.demo as explained in the Hello World

Example chapter.

Step 2

Modify the default content of res/layout/activity_main.xml file to include few

widgets in Relative layout.

Step 3

Define required constants in res/values/strings.xml file

Step 4

Run the application to launch Android emulator and verify the result of the

changes done in the application.

Source Code :

MainActivity.java

package com.example.demo;

import android.os.Bundle;

import android.app.Activity;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

Following will be the content of res/layout/activity_main.xml file −

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

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:paddingLeft="16dp"

android:paddingRight="16dp" >

<EditText

android:id="@+id/name"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:hint="@string/reminder" />

<LinearLayout

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android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:layout_alignParentStart="true"

android:layout_below="@+id/name">

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="New Button"

android:id="@+id/button" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="New Button"

android:id="@+id/button2" />

</LinearLayout>

</RelativeLayout>

Following will be the content of res/values/strings.xml to define two new

constants −

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

<string name="action_settings">Settings</string>

<string name="reminder">Enter your name</string>

</resources>

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Creating the Application using Spinner

Theory:

Android Spinner is like the combox box of AWT or Swing. It can be used to display the

multiple options to the user in which only one item can be selected by the user.

Android spinner is like the drop down menu with multiple values from which the end user

can select only one value.

Android spinner is associated with AdapterView. So you need to use one of the adapter

classes with spinner.

Source code:

File: activity_main.xml

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

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.and

roid.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

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

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="example.javatpoint.com.spinner.MainActivity">

<Spinner

android:id="@+id/spinner"

android:layout_width="149dp"

android:layout_height="40dp"

android:layout_marginBottom="8dp"

android:layout_marginEnd="8dp"

android:layout_marginStart="8dp"

android:layout_marginTop="8dp"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintEnd_toEndOf="parent"

app:layout_constraintHorizontal_bias="0.502"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintVertical_bias="0.498" />

</android.support.constraint.ConstraintLayout>

File: MainActivity.java

package example.javatpoint.com.spinner;

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import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements

AdapterView.OnItemSelectedListener {

String[] country = { "India", "USA", "China", "Japan", "Other"};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//Getting the instance of Spinner and applying OnItemSelectedListener on it

Spinner spin = (Spinner) findViewById(R.id.spinner);

spin.setOnItemSelectedListener(this);

//Creating the ArrayAdapter instance having the country list

ArrayAdapter aa = new ArrayAdapter(this,android.R.layout.simple_spinner_item,c

ountry);

aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

//Setting the ArrayAdapter data on the Spinner

spin.setAdapter(aa);

}

//Performing action onItemSelected and onNothing selected

@Override

public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long id)

{

Toast.makeText(getApplicationContext(),country[position] , Toast.LENGTH_LONG).

show();

}

@Override

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

}

Output:

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Create Video Player android application

Theory:

By the help of MediaController and VideoView classes, we can play the video files in android.

MediaController class

The android.widget.MediaController is a view that contains media controls like

play/pause, previous, next, fast-forward, rewind etc.

VideoView class

The android.widget.VideoView class provides methods to play and control the video

player.

activity_main.xml

Drag the VideoView from the pallete, now the activity_main.xml file will like this:

Source Code:

File: activity_main.xml

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

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

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity" >

<VideoView

android:id="@+id/videoView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_centerVertical="true" />

</RelativeLayout>

File: MainActivity.java

package com.example.video1;

import android.net.Uri;

import android.os.Bundle;

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

import android.app.Activity;

import android.view.Menu;

import android.widget.MediaController;

import android.widget.VideoView;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

VideoView videoView =(VideoView)findViewById(R.id.videoView1);

//Creating MediaController

MediaController mediaController= new MediaController(this);

mediaController.setAnchorView(videoView);

//specify the location of media file

Uri uri=Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/media/1.mp4");

//Setting MediaController and URI, then starting the videoView

videoView.setMediaController(mediaController);

videoView.setVideoURI(uri);

videoView.requestFocus();

videoView.start();

}

@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;

}

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

Aim: Creating the Application by using Text Edit control

Theory:

EditText is a standard entry widget in android apps. It is an overlay over TextView that

configures itself to be editable. EditText is a subclass of TextView with text editing

operations. We often use EditText in our applications in order to provide an input or text

field, especially in forms.

Procedure:

Step1: Create a new project in Android Studio and name it EditTextExample.

Step2: Now open res -> layout -> xml (or) activity_main.xml and add following code. In this

code we have added multiple edittext and a button with onclick functionality.

Step3: Now open app -> java -> package -> MainActivity.java and add the below code.

In this we just fetch the text from the edittext, further with the button click event a toast will

show the text fetched before.

Source code:

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"

tools:context="com.example.edittextexample.MainActivity">

<EditText

android:id="@+id/editText1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:hint="@string/name"

android:inputType="textPersonName"

android:selectAllOnFocus="true" />

<EditText

android:id="@+id/editText2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:hint="@string/password_0_9"

android:inputType="numberPassword" />

<EditText

android:id="@+id/editText3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:hint="@string/e_mail"

android:inputType="textEmailAddress" />

<EditText

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

android:id="@+id/editText4"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:hint="@string/date"

android:inputType="date" />

<EditText

android:id="@+id/editText5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:hint="@string/contact_number"

android:inputType="phone" />

<Button

android:id="@+id/button"

style="@android:style/Widget.Button"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="@string/submit"

android:textSize="16sp"

android:textStyle="normal|bold" />

</RelativeLayout>

MainActivity.java

package com.example.edittextexample;

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 {

Button submit;

EditText name, password, email, contact, date;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

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

email = (EditText) findViewById(R.id.editText3);

date = (EditText) findViewById(R.id.editText4);

contact = (EditText) findViewById(R.id.editText5);

submit = (Button) findViewById(R.id.button);

submit.setOnClickListener(new View.OnClickListener() {

Dept of CSE Designed By K.Dhanamjay

VEMU INSTITUTE OF TECHNOLOGY

@Override

public void onClick(View v) {

if (name.getText().toString().isEmpty() || password.getText().toString().isEmpty() ||

email.getText().toString().isEmpty() || date.getText().toString().isEmpty()

|| contact.getText().toString().isEmpty())

{

Toast.makeText(getApplicationContext(), "Enter the Data",

Toast.LENGTH_SHORT).show();

} else {

Toast.makeText(getApplicationContext(), "Name - " + name.getText().toString() +

" \n" + "Password - " + password.getText().toString()

+ " \n" + "E-Mail - " + email.getText().toString() + " \n" + "Date - " +

date.getText().toString()

+ " \n" + "Contact - " + contact.getText().toString(),

Toast.LENGTH_SHORT).show();

}

});

}

Output:

Now start the AVD in Emulator and run the App. You will see screen asking you to fill the data

in required fields like name, password (numeric), email, date, contact number. Enter data and

click on button. You will see the data entered will be displayed as Toast on screen.