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 -

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