Android Programming Tutorials 27 : BlueTooth Functionality In Android

Create Android Application:

• File >> New >> Android Application
• Enter Project name: BluetoothApp
• Package: com.ambilpursunil.newapp
• Keep other default selections, click Next until you reach Finish

                               

 1.Simply Copy and Past the Code which is display below in the  MainActivity.java 

package com.ambilpursunil.newapp;

import java.util.ArrayList;

import java.util.Set;

import android.app.Activity;

import android.bluetooth.BluetoothAdapter;

import android.bluetooth.BluetoothDevice;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.widget.Toast;

public class MainActivity extends Activity {

           

            private Button on,off,Visible,list;

            private BluetoothAdapter BA;

            private Set<BluetoothDevice>pairedDevices;

            private ListView lv;

            @Override

            protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

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

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

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

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

            lv = (ListView) findViewById(R.id.listView1);

            BA = BluetoothAdapter.getDefaultAdapter();

            }

           public void on(View view){

           if(!BA.isEnabled()){

           Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

           startActivityForResult(turnOn, 0);
Toast.makeText(getApplicationContext(), "Turned On", Toast.LENGTH_LONG).show();

            }else{

Toast.makeText(getApplicationContext(), "Already On",Toast.LENGTH_LONG).show();

            }

            }

           public void list(View view){

           pairedDevices = BA.getBondedDevices();

           ArrayList<String> list = new ArrayList<String>();

           for(BluetoothDevice bt : pairedDevices)

           list.add(bt.getName());
Toast.makeText(getApplicationContext(),"Showing Paired Devices",

           Toast.LENGTH_SHORT).show();

           lv.setAdapter(new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1, list));

           //lv.setAdapter(adapter);

            }

  public void off(View view){

            BA.disable();

Toast.makeText(getApplicationContext(), "Turned Off", Toast.LENGTH_LONG).show();

            }

public void visible(View view){

Intent getVisible = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);

       startActivityForResult(getVisible, 0);

          }

         @Override

         public boolean onCreateOptionsMenu(Menu menu) {

         // TODO Auto-generated method stub

         // Inflate the menu; this adds items to the action bar if it is present.

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

         return true;

            }

           

   }

  2.Simple Copy and Past the below code:  actvitiy_main.xml

<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:background="@drawable/black"

    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" >

   

    <ScrollView

        android:id="@+id/scrollView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_alignParentLeft="true"

        android:layout_alignParentRight="true"

        android:layout_alignParentTop="true" >

        <LinearLayout

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:orientation="vertical" >

           

        <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/app_name"

        android:textAppearance="?android:attr/textAppearanceLarge" />

       

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:id="@+id/button1"

            android:onClick="on"

            android:text="@string/on"

            android:textColor="#086A87" />

       

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:id="@+id/button2"

            android:onClick="visible"

            android:text="@string/visible"

            android:textColor="#086A87" />

       

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:id="@+id/button3"

            android:onClick="list"

            android:text="@string/list"

            android:textColor="#086A87" />

       

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:id="@+id/button4"

            android:onClick="off"

            android:text="@string/off"

            android:textColor="#086A87" />

       

        <ListView

            android:id="@+id/listView1"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:visibility="visible"

            android:textColor="#086A87">

           

        </ListView>  

      </LinearLayout>

    </ScrollView>

</RelativeLayout>

3.Copy and past the code for res=>value=>string.xml

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

<resources>

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

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

    <string name="hello_world">Hello world!</string>

    <string name="on">Turn On</string>

    <string name="off">Turn Off</string>

    <string name="visible">Get Visible</string>

    <string name="list">List Devices</string>

</resources>

4.Copy and past the code for manifest.xml

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

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

    package="com.stratageeks.bluetoothapp"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.BLUETOOTH"/>

    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.stratageeks.bluetoothapp.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

5.Right click on the project and Run As-->Android Application

OutPut:

When our application launch it consists of 4 buttons   Turn On   List Devices    GetVisible     Turn Off  it will work as same as our in build blue tooth. 

Stay Tune For Next Tutorial... WiFi In Android: