连手机热点 提示 蓝牙已断开连接
一.
1.1. /frameworks/base/packages/SettingsLib/res/values-zh-rCN/strings.xml
<string name="bluetooth_disconnected" msgid="6557104142667339895">"已断开连接"</string>
1.2.K:\ZK-Rxxx_7.1_RK3399_Firmware\ZK_RXXX_RK3399_ANDROID7.1\packages\apps\Settings\src\com\android\settings\bluetooth\BluetoothSettings.java
@Override
public void setListening(boolean listening) {
BluetoothAdapter defaultAdapter = BluetoothAdapter.getDefaultAdapter();
if (defaultAdapter == null) return;
if (listening) {
mEnabled = defaultAdapter.isEnabled();
mConnected =
defaultAdapter.getConnectionState() == BluetoothAdapter.STATE_CONNECTED;
Log.d("gatsby","state aaa -> "+ BluetoothAdapter.STATE_CONNECTED);
Log.d("gatsby","state bbb -> "+ defaultAdapter.getConnectionState());
mSummaryLoader.setSummary(this, getSummary());
mBluetoothManager.getEventManager().registerCallback(this);
} else {
mBluetoothManager.getEventManager().unregisterCallback(this);
}
}
private CharSequence getSummary() {
Log.d("gatsby","!mEnabled -> "+ !mEnabled + " mConnected ->"+mConnected);
return mContext.getString(!mEnabled ? R.string.bluetooth_disabled
: mConnected ? R.string.bluetooth_connected
: R.string.bluetooth_disconnected);
}
a. Log.d("gatsby","!mEnabled -> "+ !mEnabled + " mConnected ->"+mConnected);
mEnabled ? R.string.bluetooth_disabled: mConnected ? R.string.bluetooth_connected: R.string.bluetooth_disconnected
mEnabled ？"disabled" : mConnected ? "bluetooth_connected" : "bluetooth_disconnected";
打开蓝牙开关 未连接蓝牙 !mEnabled -> false mConnected ->false
b.mConnected = defaultAdapter.getConnectionState() == BluetoothAdapter.STATE_CONNECTED;
defaultAdapter.getConnectionState() -> 0 BluetoothAdapter.STATE_CONNECTED -> 2
1.3.Android检查设备连接状态
K:\ZK-Rxxx_7.1_RK3399_Firmware\ZK_RXXX_RK3399_ANDROID7.1\frameworks\base\core\java\android\bluetooth\BluetoothAdapter.java
/** The profile is in disconnected state */
public static final int STATE_DISCONNECTED = 0;
/**
* Get the current connection state of the local Bluetooth adapter.
* This can be used to check whether the local Bluetooth adapter is connected
* to any profile of any other remote Bluetooth Device.
*
* <p> Use this function along with {@link #ACTION_CONNECTION_STATE_CHANGED}
* intent to get the connection state of the adapter.
*
* @return One of {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTED},
* {@link #STATE_CONNECTING} or {@link #STATE_DISCONNECTED}
*
* @hide
*/
public int getConnectionState() {
if (getState() != STATE_ON) return BluetoothAdapter.STATE_DISCONNECTED;
try {
mServiceLock.readLock().lock();
if (mService != null) return mService.getAdapterConnectionState();
} catch (RemoteException e) {
Log.e(TAG, "getConnectionState:", e);
} finally {
mServiceLock.readLock().unlock();
}
return BluetoothAdapter.STATE_DISCONNECTED;
}
调用BluetoothAdapter中的getConnectionState()方法，直接检查是否存在连接状态的蓝牙设备存在 不能检测出手机发出的蓝牙 可以检测出蓝牙耳机
/** The profile is in disconnected state */
public static final int STATE_DISCONNECTED = 0;
/** The profile is in connecting state */
public static final int STATE_CONNECTING = 1;
/** The profile is in connected state */
public static final int STATE_CONNECTED = 2;
/** The profile is in disconnecting state */
public static final int STATE_DISCONNECTING = 3;
原文：https://www.cnblogs.com/crushgirl/p/14846534.html