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如何使用Android2.2在应用程序启动时获取蓝牙耳机连接状态？

发布于 2024-12-21 03:39:38 字数 117 浏览 0 评论 0原文

如何在应用程序启动时使用 android api level 8 获取蓝牙耳机连接状态（连接/断开连接）？ android2.2中有可用的粘性广播意图吗？有没有API可以获取蓝牙耳机的初始状态？有没有可用的解决方法？

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如若梦似彩虹 2024-12-28 03:39:38

我想出了解决方案：

private static final String ACTION_BT_HEADSET_STATE_CHANGED  = "android.bluetooth.headset.action.STATE_CHANGED";
private static final int STATE_CONNECTED = 0x00000002; 
private static final int STATE_DISCONNECTED  = 0x00000000;  
private static final String EXTRA_STATE = "android.bluetooth.headset.extra.STATE";

private BroadcastReceiver mBlueToothHeadSetEventReceiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
    try {
        String action = intent.getAction();

        if(action == null)
            return;

        if(action.equals(ACTION_BT_HEADSET_STATE_CHANGED)){
            int extraData = intent.getIntExtra(EXTRA_STATE  , STATE_DISCONNECTED);
            if(extraData == STATE_CONNECTED ){

                //TODO :

            }else if(extraData == STATE_DISCONNECTED){

                //TODO:
            }
        }
        } catch (Exception e) {

        //TODO:

        }
}
};

I figured out the solution:

private static final String ACTION_BT_HEADSET_STATE_CHANGED  = "android.bluetooth.headset.action.STATE_CHANGED";
private static final int STATE_CONNECTED = 0x00000002; 
private static final int STATE_DISCONNECTED  = 0x00000000;  
private static final String EXTRA_STATE = "android.bluetooth.headset.extra.STATE";

private BroadcastReceiver mBlueToothHeadSetEventReceiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
    try {
        String action = intent.getAction();

        if(action == null)
            return;

        if(action.equals(ACTION_BT_HEADSET_STATE_CHANGED)){
            int extraData = intent.getIntExtra(EXTRA_STATE  , STATE_DISCONNECTED);
            if(extraData == STATE_CONNECTED ){

                //TODO :

            }else if(extraData == STATE_DISCONNECTED){

                //TODO:
            }
        }
        } catch (Exception e) {

        //TODO:

        }
}
};

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Bonjour°[大白 2024-12-28 03:39:38

来自packages/apps/Phone/src/com/android/phone/PhoneGlobals.java:1449

        } else if (action.equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED)) {
            mBluetoothHeadsetState = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE,
                                                      BluetoothHeadset.STATE_DISCONNECTED);
            if (VDBG) Log.d(LOG_TAG, "mReceiver: HEADSET_STATE_CHANGED_ACTION");
            if (VDBG) Log.d(LOG_TAG, "==> new state: " + mBluetoothHeadsetState);
            updateBluetoothIndication(true);  // Also update any visible UI if necessary

from packages/apps/Phone/src/com/android/phone/PhoneGlobals.java:1449

        } else if (action.equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED)) {
            mBluetoothHeadsetState = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE,
                                                      BluetoothHeadset.STATE_DISCONNECTED);
            if (VDBG) Log.d(LOG_TAG, "mReceiver: HEADSET_STATE_CHANGED_ACTION");
            if (VDBG) Log.d(LOG_TAG, "==> new state: " + mBluetoothHeadsetState);
            updateBluetoothIndication(true);  // Also update any visible UI if necessary

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违心° 2024-12-28 03:39:38

这在应用程序启动时并不会真正起作用，但由于意图过滤器是自动注册的，一旦您的应用程序启动，您可能会拥有一个有效值：

声明以下意图过滤器

        <intent-filter >
            <action android:name="android.bluetooth.headset.action.AUDIO_STATE_CHANGED" />
        </intent-filter>

并在您的接收器中的 onReceive 检查：

if ("android.bluetooth.headset.action.AUDIO_STATE_CHANGED".equals(intent.getAction())) {
  headsetAudioState = intent.getIntExtra("android.bluetooth.headset.extra.AUDIO_STATE", -2);
}

并保存int 作为静态变量。您可以随时访问它，了解 BT 音频是否已连接 (1) / 已断开连接 (0)。不漂亮，但完成了工作。

另请查看：
https://github.com/android/platform_frameworks_base /blob/gingerbread/core/java/android/bluetooth/BluetoothHeadset.java

This won't really work on application startup, but as intent-filters are registered automatically, you might have a valid value, once your app gets started up:

Declare the following intent-filter

        <intent-filter >
            <action android:name="android.bluetooth.headset.action.AUDIO_STATE_CHANGED" />
        </intent-filter>

and in your Receiver in onReceive check for:

if ("android.bluetooth.headset.action.AUDIO_STATE_CHANGED".equals(intent.getAction())) {
  headsetAudioState = intent.getIntExtra("android.bluetooth.headset.extra.AUDIO_STATE", -2);
}

and save the int as a static variable. Access it anytime you want to know if BT audio is connected(1) / disconnected(0). Not pretty, but gets the job done.

Also check out:
https://github.com/android/platform_frameworks_base/blob/gingerbread/core/java/android/bluetooth/BluetoothHeadset.java

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