我想通过蓝牙连接两台设备进行数据传输。我尝试按网站http://developer.android.com/guide/topics/connectivity/bluetooth.html中的说明制作。我的应用程序可以发现并配对但无法连接。尽管付出了很多努力，我还是不明白为什么。代码;
package com.example.bluetooth_v1; // paketin ismi girilicek
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Set;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnItemClickListener
{
public static final int SUCCESS_CONNECT =0;
public static final int MESSAGE_READ = 1 ;
public static final UUID MY_UUID = UUID.fromString("00000000-2ef2-4138-ffff-
fffff16071b8");
public static final int STATE_CONNECTING = 2;
ArrayAdapter<String> liste;
Button baglan;
ListView listeG;
BluetoothAdapter bAdapter;
Set<BluetoothDevice> aygitDizisi;
IntentFilter filtre;
BroadcastReceiver alici;
ArrayList<String> pairedDevices;
ArrayList<BluetoothDevice> devices;
Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
switch(msg.what){
case SUCCESS_CONNECT:
ConnectedThread connectedThread = new
ConnectedThread((BluetoothSocket)msg.obj);
Toast.makeText(getApplicationContext(), "CONNECT", 300).show();
String s="successfully connected";
connectedThread.write(s.getBytes());
Log.i("uyarı", "connected");
break;
case MESSAGE_READ:
byte[] readBuf=(byte[])msg.obj;
String string= new String(readBuf);
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
if(bAdapter==null){
Toast.makeText(getApplicationContext(), "blu yok", 0).show();
finish();
}
else {
if(!bAdapter.isEnabled()){
turnOnBT();
}
getPairedDevices();
startDiscovery();
}
}
private void startDiscovery() {
bAdapter.cancelDiscovery();
bAdapter.startDiscovery();
}
private void turnOnBT() {
Intent intent= new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1);
}
private void getPairedDevices() {
aygitDizisi=bAdapter.getBondedDevices();
if(aygitDizisi.size()>0){
for(BluetoothDevice device:aygitDizisi){
pairedDevices.add(device.getName());
}
}
}
private void init() {
listeG=(ListView) findViewById(R.id.listView1);
liste =new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
listeG.setAdapter(liste);
listeG.setOnItemClickListener(this);
bAdapter= BluetoothAdapter.getDefaultAdapter();
filtre=new IntentFilter(BluetoothDevice.ACTION_FOUND);
pairedDevices = new ArrayList<String>();
devices=new ArrayList<BluetoothDevice>();
alici = new BroadcastReceiver(){ // ACTION_FOUND için broadcast
oluşturduk(*******)
@Override
public void onReceive(Context context, Intent intent) {//bilgiler alındı
String action=intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)){//discovery cihazı
bulduğunda bilgileri intenten al.
BluetoothDevice
device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
devices.add(device);
String s="";
for(int a = 0;a<pairedDevices.size();a++){
if(device.getName().equals(pairedDevices.get(a))){
s="(paired)";
break;
}
}
liste.add(device.getName()+" "+s+" "+"\n"+device.getAddress());
}
else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
}
else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
}
else if(BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)){
if(bAdapter.getState()==bAdapter.STATE_OFF){
}
}
}
};
registerReceiver(alici, filtre);
filtre=new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
registerReceiver(alici, filtre);
filtre=new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(alici, filtre);
filtre=new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
}
@Override
protected void onPause() {
super.onPause();
//unregisterReceiver(alici);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent
data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==RESULT_CANCELED){
Toast.makeText(getApplicationContext(), "devam etmek için
blu aç", Toast.LENGTH_LONG).show();
finish();
}
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
if(bAdapter.isDiscovering()){
bAdapter.cancelDiscovery();
}
if(liste.getItem(arg2).contains("paired")){
BluetoothDevice selectedDevice = devices.get(arg2);
ConnectThread connect = new ConnectThread(selectedDevice);
bAdapter.cancelDiscovery();
connect.start();
Log.i("uyarı", "in click listener");
}
else{
Toast.makeText(getApplicationContext(), "Cihaz eşlenmedi",
0).show();
}
}
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
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) { }
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
bAdapter.cancelDiscovery();
Log.i("uyarı", "connect-run");
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
Log.i("uyarı", "connect succeded");
} catch (IOException connectException) {Log.i("uyarı", "connected failed");
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
// Do work to manage the connection (in a separate thread)
mHandler.obtainMessage(SUCCESS_CONNECT,mmSocket).sendToTarget();
}
/** 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 ;// 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
buffer = new byte[1024];
bytes = mmInStream.read(buffer);
mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
// Send the obtained bytes to the UI activity
} 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);
} catch (IOException e) { }
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}
此调试输出; 我的调试输出;
05-30 16:23:42.302: I/uyarı(3533): in click listener
05-30 16:23:42.307: I/uyarı(3533): connect-run
05-30 16:23:44.937: I/uyarı(3533): connected failed
05-30 16:23:48.837: I/uyarı(3533): in click listener
05-30 16:23:48.842: I/uyarı(3533): connect-run
05-30 16:23:49.962: I/uyarı(3533): connected failed
Eclipse调试输出
05-30 16:21:34.027: E/ActivityThread(2974): android.app.IntentReceiverLeaked:
Activity com.example.bluetooth_v1.MainActivity has leaked IntentReceiver
com.example.bluetooth_v1.MainActivity$2@414513f8 that was originally
registered here. Are you missing a call to unregisterReceiver()?