我想将我的设备（HTC Wildfire S）与OBD2 Dongle连接。 为此我已经写了一个基于Google Developer的蓝牙程序。 如果我尝试在设备上运行apk，我会得到一个异常，返回false。 所以连接没有运行。 有谁能够帮我？！ 我是这个论坛的新人。对不起我的英语不好。这不是我的最爱languange =）
在Manifest中我设置了蓝牙和蓝牙管理员权限。
这里是Main，Activity和Manifest的源代码。
主：
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity{
private BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
private ConnectedThread connected;
private boolean isConnected = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//Button ruft die Methode verbindung auf!!!!
public void verbinden(View view){
verbindung();
}
//Verbindung wird ausgeführt
private void verbindung(){ //Muss mit Button aufgerufen werden
String address = "B8:E8:56:41:74:09"; //Adresse vom Dongle
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
ConnectThread connect = new ConnectThread(device);
connect.start();
//connected.write(null);
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server code
Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
tmp = (BluetoothSocket) m.invoke(device, 1);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
mBluetoothAdapter.cancelDiscovery();
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
boolean b = mmSocket.isConnected(); System.out.println(b);
mmSocket.connect();
isConnected = true;
} catch (IOException connectException) {
// Unable to connect; close the socket and get out
System.out.println("Ich bin eine Exception.");
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
connected = new ConnectedThread(mmSocket);
connected.run();
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[1024]; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI activity
//mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
// .sendToTarget();
} catch (IOException e) {
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
connected.write(null);
} catch (IOException e) {}
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}
的活动：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.blue_final.MainActivity$PlaceholderFragment" >
<Button
android:id="@+id/BtnVerbinden"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:onClick="verbinden"
android:text="verbinden" />
<Button
android:id="@+id/BtnSenden"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/BtnVerbinden"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/BtnVerbinden"
android:layout_marginBottom="17dp"
android:onClick="senden"
android:text="Senden" />
<EditText
android:id="@+id/TFKonsole"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/BtnSenden"
android:layout_alignLeft="@+id/BtnVerbinden"
android:layout_alignRight="@+id/BtnVerbinden"
android:layout_below="@+id/BtnVerbinden"
android:ems="10" />
</RelativeLayout>
答案 0 :(得分：0)
你得到什么样的例外？ 应用程序启动时或按BtnVerbinden时会出现异常吗？ 此外，请确保Dongle与您的Android设备配对。 请提供一些更详细的信息例外。
编辑：
我尝试了你的代码。 基本上它正在工作，我按下按钮并成功连接到另一台设备。
答案 1 :(得分：0)
我的OBD II适配器出了些问题。他坏了。现在我有一个新的。 它工作正常。