自动连接蓝牙持续连接的设备 [英] auto connect bluetooth to last connected device
本文介绍了自动连接蓝牙持续连接的设备的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用的蓝牙聊天样品和其完美配对的设备，并从一个设备发送文本到另一个，但有时它断开，我想再次与上次连接的设备重新连接。如何做我做到这一点。我有细试图从自动连接内从蓝牙Play商店，但它连接耳机和从应用程序之外没有。
我如何从应用程序内实现这一目标？
先谢谢了。
E / BluetoothChatService（10175）：接受（）失败
E / BluetoothChatService（10175）：java.io.IOException异常：操作已取消
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothSocket.acceptNative（本机方法）
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothSocket.accept（BluetoothSocket.java:311）
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothServerSocket.accept（BluetoothServerSocket.java:107）
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothServerSocket.accept（BluetoothServerSocket.java:93）
E / BluetoothChatService（10175）：在com.example.android.BluetoothChat.BluetoothChatService$AcceptThread.run(BluetoothChatService.java:276)
E / BluetoothChatService（10175）：断开
E / BluetoothChatService（10175）：java.io.IOException异常：软件导致连接中断
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothSocket.readNative（本机方法）
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothSocket.read（BluetoothSocket.java:333）
E / BluetoothChatService（10175）：在android.bluetooth.BluetoothInputStream.read（BluetoothInputStream.java:96）
E / BluetoothChatService（10175）：在java.io.InputStream.read（InputStream.java:163）
E / BluetoothChatService（10175）：在com.example.android.BluetoothChat.BluetoothChatService$ConnectedThread.run(BluetoothChatService.java:436) E / AndroidRuntime（10175）：致命异常：螺纹1274
E / AndroidRuntime（10175）：显示java.lang.NullPointerException
E / AndroidRuntime（10175）：在com.example.android.BluetoothChat.BluetoothChatService.connectionLost（BluetoothChatService.java:242）
E / AndroidRuntime（10175）：在com.example.android.BluetoothChat.BluetoothChatService.access $ 6（BluetoothChatService.java:221）
E / AndroidRuntime（10175）：在com.example.android.BluetoothChat.BluetoothChatService$ConnectedThread.run(BluetoothChatService.java:443)E/BluetoothChat(10175): - ON PAUSE -
解决方案
写到这使用gedit的，因为我没有日食大气压。所以，如果有一些编码错误，请不要犹豫，编辑。为了便于说明，我没有使用的共享preferences这里，如果你想使用不要犹豫了。
//假设你有设备地址和连接
私人字符串partnerDevAdd =00：11：22：AA：BB：CC;
私人布尔isConnected = TRUE;IntentFilter的过滤器=新的IntentFilter（）;
filter.addAction（BluetoothDevice.ACTION_FOUND）;
filter.addAction（BluetoothDevice.ACTION_ACL_CONNECTED）;
filter.addAction（BluetoothDevice.ACTION_ACL_DISCONNECTED）;registerReceiver（mReceiver，过滤器）;//创建蓝牙相关检查一个BroadcastReceiver
私人最终的BroadcastReceiver mReceiver =新的广播接收器（）{
公共无效的onReceive（上下文的背景下，意图意图）{
字符串行动= intent.getAction（）; //我们不想重新连接到已连接的设备
如果（isConnected == FALSE）{
//当发现找到的设备
如果（BluetoothDevice.ACTION_FOUND.equals（动作））{
//从意向获取BluetoothDevice类对象
BluetoothDevice类设备= intent.getParcelableExtra（BluetoothDevice.EXTRA_DEVICE）; //检查发现的设备是我们不得不与通讯
如果（device.getAddress（）。等于（partnerDevAdd）==真）
connectToExisting（设备）;
}
} 如果（BluetoothDevice.ACTION_ACL_CONNECTED.equals（动作））{
//从意向获取BluetoothDevice类对象
BluetoothDevice类设备= intent.getParcelableExtra（BluetoothDevice.EXTRA_DEVICE）; //检查连接的设备是我们不得不与通讯
如果（device.getAddress（）。等于（partnerDevAdd）==真）
isConnected = TRUE;
}否则如果（BluetoothDevice.ACTION_ACL_DISCONNECTED.equals（动作））{
//从意向获取BluetoothDevice类对象
BluetoothDevice类设备= intent.getParcelableExtra（BluetoothDevice.EXTRA_DEVICE）; //检查连接的设备是我们不得不与通讯
如果（device.getAddress（）。等于（partnerDevAdd）==真）
isConnected = FALSE;
}
}
};私人无效connectToExisting（BluetoothDevice类设备）{
新ConnectThread（设备）;
}
ConnectThread可以在这里找到的http://developer.android.com/guide/topics/connectivity/bluetooth.html#ConnectingAsAClient
I am using bluetooth chat sample and its perfectly fine with pairing the devices and sending text from one device to another but sometimes it disconnects and I would like to reconnect with the last connected device again .How do I achieve this .I have tried auto connect bluetooth from play store but it connects headset and from outside the app not from within.
How do I achieve this from within the App?
Thanks in Advance.
E/BluetoothChatService(10175): accept() failed
E/BluetoothChatService(10175): java.io.IOException: Operation Canceled
E/BluetoothChatService(10175): at android.bluetooth.BluetoothSocket.acceptNative(Native Method)
E/BluetoothChatService(10175): at android.bluetooth.BluetoothSocket.accept(BluetoothSocket.java:311)
E/BluetoothChatService(10175): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:107)
E/BluetoothChatService(10175): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:93)
E/BluetoothChatService(10175): at com.example.android.BluetoothChat.BluetoothChatService$AcceptThread.run(BluetoothChatService.java:276)
E/BluetoothChatService(10175): disconnected
E/BluetoothChatService(10175): java.io.IOException: Software caused connection abort
E/BluetoothChatService(10175): at android.bluetooth.BluetoothSocket.readNative(Native Method)
E/BluetoothChatService(10175): at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:333)
E/BluetoothChatService(10175): at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
E/BluetoothChatService(10175): at java.io.InputStream.read(InputStream.java:163)
E/BluetoothChatService(10175): at com.example.android.BluetoothChat.BluetoothChatService$ConnectedThread.run(BluetoothChatService.java:436)
E/AndroidRuntime(10175): FATAL EXCEPTION: Thread-1274
E/AndroidRuntime(10175): java.lang.NullPointerException
E/AndroidRuntime(10175): at com.example.android.BluetoothChat.BluetoothChatService.connectionLost(BluetoothChatService.java:242)
E/AndroidRuntime(10175): at com.example.android.BluetoothChat.BluetoothChatService.access$6(BluetoothChatService.java:221)
E/AndroidRuntime(10175): at com.example.android.BluetoothChat.BluetoothChatService$ConnectedThread.run(BluetoothChatService.java:443)E/BluetoothChat(10175): - ON PAUSE -
解决方案
Wrote this using gEdit since, I don't have eclipse atm. So if there is some coding error please don't hesitate to edit this. For ease of explanation I haven't used SharedPreferences here, if you want to use don't hesitate it.
//Assuming that you have device address and is connected
private String partnerDevAdd="00:11:22:AA:BB:CC";
private boolean isConnected=true;
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
registerReceiver(mReceiver, filter);
// Create a BroadcastReceiver for bluetooth related checks
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
//We don't want to reconnect to already connected device
if(isConnected==false){
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Check if the found device is one we had comm with
if(device.getAddress().equals(partnerDevAdd)==true)
connectToExisting(device);
}
}
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Check if the connected device is one we had comm with
if(device.getAddress().equals(partnerDevAdd)==true)
isConnected=true;
}else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Check if the connected device is one we had comm with
if(device.getAddress().equals(partnerDevAdd)==true)
isConnected=false;
}
}
};
private void connectToExisting(BluetoothDevice device){
new ConnectThread(device);
}
ConnectThread is available here http://developer.android.com/guide/topics/connectivity/bluetooth.html#ConnectingAsAClient
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