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[英]Android 2.2 progammically tell if my Bluetooth Headset is connected on application start
[英]How to get Bluetooth Headset connection state on application start-up using Android2.2?
如何在應用程序啟動時使用android api level 8獲得藍牙耳機連接狀態(連接/斷開連接)? android2.2中是否有任何粘性廣播意圖? 是否有任何API可以獲取藍牙耳機的初始狀態? 有沒有可用的解決方法?
我想出了解決方案:
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:
}
}
};
這實際上不會在應用程序啟動時起作用,但是由於意圖過濾器是自動注冊的,因此一旦應用程序啟動,您可能會有一個有效值:
聲明以下intent-filter
<intent-filter >
<action android:name="android.bluetooth.headset.action.AUDIO_STATE_CHANGED" />
</intent-filter>
並在onReceive的Receiver中檢查:
if ("android.bluetooth.headset.action.AUDIO_STATE_CHANGED".equals(intent.getAction())) {
headsetAudioState = intent.getIntExtra("android.bluetooth.headset.extra.AUDIO_STATE", -2);
}
並將int保存為靜態變量。 如果您想知道BT音頻是否已連接(1)/斷開連接(0),請隨時訪問它。 不漂亮,但完成工作。
另請查看: https : //github.com/android/platform_frameworks_base/blob/gingerbread/core/java/android/bluetooth/BluetoothHeadset.java
來自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
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