Turn-On BlueTooth using intent of BluetoothAdapter.ACTION_REQUEST_ENABLE

Further work on last exercise "Detect Bluetooth state". If device support bluetooth and it's currently turned OFF, will startActivity with intent of BluetoothAdapter.ACTION_REQUEST_ENABLE; to ask user accept to turn on BlueTooth.



Modify AndroidBluetooth.java

package com.exercise.AndroidBluetooth;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class AndroidBluetooth extends Activity {
 
 private static final int REQUEST_ENABLE_BT = 1;
 
   /** Called when the activity is first created. */
 
 TextView stateBluetooth;
 BluetoothAdapter bluetoothAdapter;
 
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
      
       stateBluetooth = (TextView)findViewById(R.id.bluetoothstate);
       bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
      
       CheckBlueToothState();
   }
  
   private void CheckBlueToothState(){
    if (bluetoothAdapter == null){
        stateBluetooth.setText("Bluetooth NOT support");
       }else{
        if (bluetoothAdapter.isEnabled()){
         if(bluetoothAdapter.isDiscovering()){
          stateBluetooth.setText("Bluetooth is currently in device discovery process.");
         }else{
          stateBluetooth.setText("Bluetooth is Enabled.");
         }
        }else{
         stateBluetooth.setText("Bluetooth is NOT Enabled!");
         Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
        }
       }
   }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  if(requestCode == REQUEST_ENABLE_BT){
   CheckBlueToothState();
  }
  
 }
 
}

Download the files.

next;
- Get the list of paired Bluetooth devices