Question

我制作了一个sms接收器文本，只有在蓝牙打开并且在电路板连接时它们才能通话。我看谷歌和找到的教程告诉我如何连接，但我找不到合适的一个来检查是否打开或关闭。我从

开始

if (bluetooth == on){
//do some stuff.
}
else {
// do other stuff

这是我的代码，如果它可以帮助您理解：

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;


 public class RecevoirSms extends BroadcastReceiver
{
final SmsManager sms = SmsManager.getDefault();

@Override
public void onReceive(Context context, Intent intent) 
{
    final Bundle bundle = intent.getExtras();          
    final Object[] pdusObj = (Object[]) bundle.get("pdus");         
    for (int i = 0; i < pdusObj.length; i++) {                      
    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);     
    String phoneNumber = currentMessage.getDisplayOriginatingAddress();            
    String senderNum = phoneNumber;             
    String Message = currentMessage.getDisplayMessageBody();   

 if (senderNum.contains("3330") || senderNum.contains("5149921188") || senderNum.contains("9000"))   {
}

 else {

    String word = senderNum;
    String remove ="+1";
    String Numero = (removeWords(word, remove));
    MemoireCourtTerme.Nsms =  Numero;  
    MemoireCourtTerme.Message = Message;

    if (Message.contains("eva") && Message.contains("?") || Message.contains("Eva") && Message.contains("?")){
       Intent i2 = new Intent(context,EvaSms.class); 
       i2.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
       context.startActivity(i2); 
    }

    else {
           MemoireCourtTerme.Mode = "SmsRecu";
           MemoireCourtTerme.ReponceEva = "Vous avez reçu un nouveau message voulez vous l'écoutez?";
           MemoireCourtTerme.ReponceEvaDuree = "5000";
           Intent i2 = new Intent(context,Parole.class); 
           i2.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
           context.startActivity(i2); 
        }


            }                         
}
}
public static String removeWords(String word, String remove){
    return word.replace(remove, "");
}
}

Answer 1

BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
    // Device does not support Bluetooth
} else {
    if (!mBluetoothAdapter.isEnabled()) {
        // Bluetooth is not enable :)
    }
}

并使用权限： -

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

适用于HeadSet配置文件控制

BluetoothHeadset mBluetoothHeadset;

// Get the default adapter
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

// Establish connection to the proxy.
mBluetoothAdapter.getProfileProxy(context, mProfileListener, BluetoothProfile.HEADSET);

private BluetoothProfile.ServiceListener mProfileListener = new BluetoothProfile.ServiceListener() {
    public void onServiceConnected(int profile, BluetoothProfile proxy) {
        if (profile == BluetoothProfile.HEADSET) {
            mBluetoothHeadset = (BluetoothHeadset) proxy;
        }
    }
    public void onServiceDisconnected(int profile) {
        if (profile == BluetoothProfile.HEADSET) {
            mBluetoothHeadset = null;
        }
    }
};

// ... call functions on mBluetoothHeadset

// Close proxy connection after use.
mBluetoothAdapter.closeProfileProxy(mBluetoothHeadset);

Answer 2

然后会出现一个警报，允许用户回复该请求。有一个BluetoothAdapter函数enable()，但documentation明确不鼓励使用它，除非在特定情况下。

BluetoothAdapter BluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
Toast.makeText(getApplication(),"Bluetooth not available",Toast.LENGHT_LONG).show();
}
else{  
if (BluetoothAdapter.isEnabled()) {
Toast.makeText(getApplication(),"Bluetooth is ON",Toast.LENGHT_LONG).show();
}
else{
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}}

Answer 3

使用此代码：

AudioManager mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
boolean retval = mAudioManager.isBluetoothScoOn();

Answer 4

喜欢

val filter = IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED)
 registerReceiver(bluetoothChangeReceiver, filter)


 private val bluetoothChangeReceiver: BroadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent) {
            val action = intent.action

            if (action == BluetoothAdapter.ACTION_STATE_CHANGED) {
               val state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
                        BluetoothAdapter.ERROR)
                when (state) {
                    BluetoothAdapter.STATE_OFF -> Log.i(TAG, "Bluetooth off")
                    BluetoothAdapter.STATE_TURNING_OFF -> Log.i(TAG, "Turning Bluetooth off...")
                    BluetoothAdapter.STATE_ON -> Log.i(TAG, "Bluetooth on")
                    BluetoothAdapter.STATE_TURNING_ON -> Log.i(TAG, "Turning Bluetooth on...")
                }
            }
        }
    }

android检查蓝牙是否打开/关闭

4 个答案: