bluetooth-蓝牙事件监听

今天在做项目的时候，需要监听一个蓝牙耳机的连接状态。就写了一个小的测试方法。记录如下

看代码

这要处理的是蓝牙监听事件

package com.example.alert;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothProfile;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;

public class HeadsetPlugReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        String action = intent.getAction();
        if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) {
            Log.e("123", "BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED");
        } else if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
            Log.e("123", "BluetoothAdapter.ACTION_STATE_CHANGED");
            int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);

            switch (state) {
            case BluetoothAdapter.STATE_OFF:
                Log.e("123", "BluetoothAdapter.STATE_OFF");
                break;
            case BluetoothAdapter.STATE_TURNING_ON:

                Log.e("123", "BluetoothAdapter.STATE_TURNING_ON");
                break;
            case BluetoothAdapter.STATE_ON:
                Log.e("123", "BluetoothAdapter.STATE_ON");

                break;
            case BluetoothAdapter.STATE_TURNING_OFF:
                Log.e("123", "BluetoothAdapter.STATE_TURNING_OFF");
                break;
            }

        } else if (action
                .equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED)) {
            Log.e("123", "BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED");
            int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1);

            switch (state) {
            case BluetoothProfile.STATE_DISCONNECTED:
                Log.e("123", "BluetoothProfile.STATE_DISCONNECTED");
                break;
            case BluetoothProfile.STATE_CONNECTING:
                Log.e("123", "BluetoothProfile.STATE_CONNECTING");

                break;
            case BluetoothProfile.STATE_CONNECTED:
                Log.e("123", "BluetoothProfile.STATE_CONNECTED");

                break;
            case BluetoothProfile.STATE_DISCONNECTING:
                Log.e("123", "BluetoothProfile.STATE_DISCONNECTING");

                break;
            }

        }

    }

}

蓝牙的监听，需要加入权限，如下

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

下面是我们打印的结果

1.没有蓝牙耳机连接的情况下

蓝牙从断开到连接

  1 09-21 11:45:27.223: E/123(15118): BluetoothAdapter.ACTION_STATE_CHANGED
  2 09-21 11:45:27.223: E/123(15118): BluetoothAdapter.STATE_TURNING_ON
  3 09-21 11:45:27.707: E/123(15118): BluetoothAdapter.ACTION_STATE_CHANGED
  4 09-21 11:45:27.708: E/123(15118): BluetoothAdapter.STATE_ON

从连接到断开

  1 09-21 11:49:09.126: E/123(15118): BluetoothAdapter.ACTION_STATE_CHANGED
  2 09-21 11:49:09.126: E/123(15118): BluetoothAdapter.STATE_TURNING_OFF
  3 09-21 11:49:09.271: E/123(15118): BluetoothAdapter.ACTION_STATE_CHANGED
  4 09-21 11:49:09.271: E/123(15118): BluetoothAdapter.STATE_OFF

2.有蓝牙耳机连接的情况

 关闭蓝牙耳机（蓝牙保持打开）

  1 09-21 22:12:15.439: E/123(17042): BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED
  2 09-21 22:12:15.449: E/123(17042): BluetoothProfile.STATE_DISCONNECTED
  3 09-21 22:12:16.457: E/123(17042): BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED

连接蓝牙耳机

  1 09-21 22:14:22.356: E/123(17042): BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED
  2 09-21 22:14:22.356: E/123(17042): BluetoothProfile.STATE_CONNECTED
  3 09-21 22:14:22.357: E/123(17042): BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED

关闭蓝牙

  1 09-21 22:15:12.558: E/123(17042): BluetoothAdapter.ACTION_STATE_CHANGED
  2 09-21 22:15:12.559: E/123(17042): BluetoothAdapter.STATE_TURNING_OFF
  3 09-21 22:15:13.557: E/123(17042): BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED
  4 09-21 22:15:13.557: E/123(17042): BluetoothProfile.STATE_DISCONNECTED
  5 09-21 22:15:13.908: E/123(17042): BluetoothAdapter.ACTION_STATE_CHANGED
  6 09-21 22:15:13.908: E/123(17042): BluetoothAdapter.STATE_OFF

打开蓝牙

  1 09-21 22:16:06.976: E/123(17042): BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED
  2 09-21 22:16:06.976: E/123(17042): BluetoothProfile.STATE_CONNECTING
  3 09-21 22:16:06.978: E/123(17042): BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED
  4 09-21 22:16:07.036: E/123(17042): BluetoothAdapter.ACTION_STATE_CHANGED
  5 09-21 22:16:07.036: E/123(17042): BluetoothAdapter.STATE_ON
  6 09-21 22:16:10.616: E/123(17042): BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED
  7 09-21 22:16:10.616: E/123(17042): BluetoothProfile.STATE_CONNECTED
  8 09-21 22:16:10.619: E/123(17042): BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED

 从上面的结果我们能够明白蓝牙监听相关事件

的职责

1.BluetoothAdapter.ACTION_STATE_CHANGED：这个主要是用来监听蓝牙打开与否的状态，它穿过来的参数包含蓝牙正在断开、断开、正在连接、连接的状态，每次状态更改，都会触发这个广播

2.BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED：这个主要是监听蓝牙设备连接状态。它同样包含四种状态

3.BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED：这个就是监听蓝牙耳机的连接状态了。

至于他们监听的顺序，目前还不大清楚，似乎没有一个严格的先后顺序。就是感觉是

如果设备处于连接状态，优先级比较高

如果设备处于断开状态，它的存在条件优先级比较高