我正在尝试通过安装在Nexus 5中的应用程序连接设备.我想在
android中制作一个像
rainbow contacts的应用程序.在我的应用程序中,我的目标是通过蓝牙连接到另一个设备,并传送一组联系人或文件.
我跟着 this question,但提到的解决办法对我来说没有办法
Here是我的完整代码.
这是我的应用程序的代码段,我试图获取套接字并进行连接.
我跟着 this question,但提到的解决办法对我来说没有办法
Here是我的完整代码.
这是我的应用程序的代码段,我试图获取套接字并进行连接.
我能够通过配对设备对话框,但是当我尝试配对时,会出现错误
//to create socket
if (secure) {
bluetoothSocket = device.createRfcommSocketToServiceRecord(uuid);
} else {
bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid);
}
//connection establishment
try {
bluetoothSocket.connect();
success = true;
break;
} catch (IOException e) {
//try the fallback
try {
Class<?> clazz = tmp.getRemoteDevice().getClass();
Class<?>[] paramTypes = new Class<?>[] {Integer.TYPE};
Method m = clazz.getMethod("createRfcommSocket",paramTypes);
Object[] params = new Object[] {Integer.valueOf(1)};
bluetoothSocket = (BluetoothSocket) m.invoke(tmp.getRemoteDevice(),params);
Thread.sleep(500);
bluetoothSocket.connect();
success = true;
break;
} catch (FallbackException e1) {
Log.w("BT","Could not initialize FallbackBluetoothSocket classes.",e);
} catch (InterruptedException e1) {
Log.w("BT",e1.getMessage(),e1);
} catch (IOException e1) {
Log.w("BT","Fallback Failed. Cancelling.",e1);
}
}
我错了
09-06 13:44:57.247 27860-27860/com.example.gauravdubey.myapplication I/BT﹕ Attempting to connect to Protocol: 00001101-0000-1000-8000-00805f9b34fb
09-06 13:44:57.247 27860-27860/com.example.gauravdubey.myapplication W/BluetoothAdapter﹕ getBluetoothService() called with no BluetoothManagerCallback
09-06 13:44:57.247 27860-27860/com.example.gauravdubey.myapplication D/BluetoothSocket﹕ connect(),SocketState: INIT,mPfd: {ParcelFileDescriptor: FileDescriptor[56]}
09-06 13:44:58.667 27860-27860/com.example.gauravdubey.myapplication W/BluetoothAdapter﹕ getBluetoothService() called with no BluetoothManagerCallback
09-06 13:44:58.667 27860-27860/com.example.gauravdubey.myapplication D/BluetoothSocket﹕ connect(),mPfd: {ParcelFileDescriptor: FileDescriptor[59]}
09-06 13:45:03.267 27860-27860/com.example.gauravdubey.myapplication W/BT﹕ Fallback Failed. Cancelling.
java.io.IOException: read Failed,socket might closed or timeout,read ret: -1
at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:505)
at android.bluetooth.BluetoothSocket.waitSocketSignal(BluetoothSocket.java:482)
at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:324)
at com.example.gauravdubey.myapplication.BluetoothConnector$FallbackBluetoothSocket.connect(BluetoothConnector.java:198)
at com.example.gauravdubey.myapplication.BluetoothConnector.connect(BluetoothConnector.java:62)
at com.example.gauravdubey.myapplication.ConnectThread.run(ConnectThread.java:101)
at com.example.gauravdubey.myapplication.MainActivity$1.onItemClick(MainActivity.java:288)
at android.widget.AdapterView.performItemClick(AdapterView.java:299)
at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:2911)
at android.widget.AbsListView$3.run(AbsListView.java:3645)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
09-06 13:45:03.267 27860-27860/com.example.gauravdubey.myapplication V/connectThread﹕ Could not connect to device: B0:D0:9C:8B:A4:47
09-06 13:45:03.267 27860-27860/com.example.gauravdubey.myapplication I/Choreographer﹕ Skipped 361 frames! The application may be doing too much work on its main thread.
那么我做错了什么？任何帮助将不胜感激
解决方法
在BluetoothConnector.java的构造函数中,会传递一个uuidCandidates列表.
public BluetoothConnector(BluetoothDevice device,boolean secure,BluetoothAdapter adapter,List<UUID> uuidCandidates)
{
this.device = device;
this.secure = secure;
this.adapter = adapter;
this.uuidCandidates = uuidCandidates;
if (this.uuidCandidates == null || this.uuidCandidates.isEmpty()) {
this.uuidCandidates = new ArrayList<UUID>();
this.uuidCandidates.add(UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66"));
}
}
你是否通过了null？
如果是,则尝试为要连接的蓝牙设备调用device.fetchUuidsWithSdp(),并在接收器中接收BluetoothDevice.ACTION_UUID意图.因为这将获取设备支持的uuids列表.
