安卓开发萌新。在做一个蓝牙通信的APP，现在打开蓝牙可以搜索到周围一开启蓝牙的设备，点击连接后，也会出现配对的窗口，但软件会出现闪退，不知是何问题。以下是源代码，希望各路大佬可以帮我解决一下这个问题，是否是线程未开启呢。是否是因为我已经设置与单片机通信的UUID的问题。
package com.windfire;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
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.os.Bundle;
import android.os.Handler;
import android.os.Message;
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.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class WindFireDemoActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
/*建立蓝牙适配器，搜索可连接设备，进行配对，*/
public static final int RECV_VIEW = 0;
private BluetoothAdapter mBluetoothAdapter;//蓝牙适配器
private ArrayAdapter<String> deviceAdapter;//设备显示列表适配器
private ConnectThread connectthread;
private List<String> listDevices;
private ListView text;//显示需要配对设备
private Button parameterinput;//参数录入
private Button teststart;//开始测试
private Button search;//寻找设备按钮
private Button send;//发送按钮
private TextView datatest;
private boolean sendflag = false;
private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");//蓝牙串口服务
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(android.R.style.Theme_Black_NoTitleBar);
setContentView(R.layout.main);
initview();//实例化
initBroadcast();//初始化广播
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//获取本地蓝牙适配器，初始化蓝牙
//是否支持蓝牙功能
if(mBluetoothAdapter == null)
{
Toast.makeText(WindFireDemoActivity.this, "所持设备不支持蓝牙", Toast.LENGTH_SHORT).show();
}
}
/************************定义广播接收,查找设备，检查配对信息，添加到listDevices中*************************/
private BroadcastReceiver mReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
String action = intent.getAction();//服务发现远程设备时
String str = "";
if(BluetoothDevice.ACTION_FOUND.equals(action))//每扫描到一个设备，系统都会发送此广播
{
//从Intent中获取device信息
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);//获取搜索到的设备信息
str = device.getName()+ ":" + device.getAddress() + "\n";
//当发现的新设备不存在于设备配对列表中时，将设备的名字和地址添加到ArrayAdapter中
if(listDevices.indexOf(str) == -1)//防止重复添加
{
listDevices.add(str);//添加搜索到的设备信息
deviceAdapter.notifyDataSetChanged();
}
}
else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action))
{
Toast.makeText(WindFireDemoActivity.this, "Discovery finished", Toast.LENGTH_SHORT).show();
}
}
};
/**************************************UI实例化*************************************************/
public void initview()
{
parameterinput =(Button)findViewById(R.id.input);
teststart =(Button)findViewById(R.id.start);
search =(Button)findViewById(R.id.button);
send =(Button)findViewById(R.id.send);
text = (ListView)findViewById(R.id.listView1);
datatest = (TextView)findViewById(R.id.datatest);
parameterinput.setOnClickListener(this);
teststart.setOnClickListener(this);
search.setOnClickListener(this);
send.setOnClickListener(this);
listDevices = new ArrayList<String>();
deviceAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, listDevices);//列表显示listDevices的设备名称及mac
text.setAdapter(deviceAdapter);
text.setOnItemClickListener( new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> adapterview, View view, int position,long id)
{
// TODO Auto-generated method stub
//绑定所选择的蓝牙MAC地址设备
String str = deviceAdapter.getItem(position);
if(null == str)
{
Toast.makeText(getApplicationContext(), "未选中设备", Toast.LENGTH_SHORT).show();
}
String mac = str.substring(str.indexOf(":")+1).trim();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(mac);//以mac去创建一个device
connectthread = new ConnectThread(device);
connectthread.start();
Toast.makeText(getApplicationContext(), "连接到所选设备", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId())
{
case R.id.input:
Intent intent1 = new Intent(WindFireDemoActivity.this,parametershow.class);
startActivity(intent1);
break;
case R.id.start:
Intent intent2 = new Intent(WindFireDemoActivity.this,datashow.class);
startActivity(intent2);
break;
case R.id.button:
if(!mBluetoothAdapter.isEnabled())
{
Intent enabler=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivity(enabler);//开启蓝牙
if (mBluetoothAdapter.isEnabled())//设置可见
{
if (mBluetoothAdapter.getScanMode()!=BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE)
{
Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 200);
startActivity(discoverableIntent);
}
}
}
if (mBluetoothAdapter.isDiscovering())
{
mBluetoothAdapter.cancelDiscovery();
Toast.makeText(getApplicationContext(), "Exit Discovery", Toast.LENGTH_SHORT).show();
}
else//搜索未开始
{
mBluetoothAdapter.startDiscovery();//开始搜索
Toast.makeText(getApplicationContext(), "Start Discovery", Toast.LENGTH_SHORT).show();
}
break;
case R.id.send:
if(connectthread != null)//连接建立完成，准备发送指令开始通信
{
try
{
sendflag = true;
String str = "0x33";
connectthread.write(getHexBytes(str));
datatest.setText("send success");
}
catch(Exception e)
{
e.printStackTrace();
}
}
else
{
Toast.makeText(WindFireDemoActivity.this, "未连接蓝牙设备", Toast.LENGTH_SHORT).show();
}
break;
}
}
/**************************************Broadcast初始化*************************************************/
public void initBroadcast(){
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver,filter);
}
/**************************************连接线程*************************************************/
public class ConnectThread extends Thread
{
private BluetoothSocket btSocket;
private InputStream in;
private OutputStream out;
//private BluetoothDevice btDev;
public ConnectThread (BluetoothDevice device)
{
try
{
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
}
catch(IOException e)
{
e.printStackTrace();
}
}
public void run()
{
//发现服务会减慢连接建立速度，因此关闭掉
if(mBluetoothAdapter.isDiscovering())
{
mBluetoothAdapter.cancelDiscovery();
}//退出搜索
try
{
//请求连接，该操作会阻塞线程
btSocket.connect();
Toast.makeText(WindFireDemoActivity.this, "连接建立", Toast.LENGTH_SHORT).show();
in = btSocket.getInputStream();
out = btSocket.getOutputStream();
if(sendflag)
{
new Thread(new Runnable(){
@Override
public void run(){
byte[] buffer = new byte[1024];
int bytes;
try{
while((bytes = in.read(buffer)) != -1)
{
String str = new String(buffer,"UTF-8");
str = str.substring(0, bytes);
if(str.endsWith(" "))
{
datatest.append(str);
continue;
}
Bundle bundle = new Bundle();
Message message = new Message();
bundle.putString("recv", datatest.toString());
message.what = RECV_VIEW;
message.setData(bundle);
handler.sendMessage(message);
}
}
catch(IOException e)
{
e.printStackTrace();
}
}
}).start();
}
}
catch(IOException e){
try{
btSocket.close();
}
catch(IOException e1){
e1.printStackTrace();
}
e.printStackTrace();
}
}
public void write(byte[] bytes)
{
try
{
out.write(bytes);
}
catch(IOException e)
{
e.printStackTrace();
}
}
public void cancel()
{
try
{
btSocket.close();
}
catch (IOException e)
{
}
}
}
/******************************************Handler处理message*************************************/
private Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
Bundle bundle = null;
switch(msg.what)
{
case RECV_VIEW:
bundle = msg.getData();
String recv = bundle.getString("recv");
datatest.append(recv+"\n");
break;
default:
Toast.makeText(getApplicationContext(), "接受信息失败", Toast.LENGTH_SHORT).show();
/*case NOTICE_VIEW:
bundle = msg.getData();
String notice = bundle.getString("notice");
datatest.append(notice);*/
break;
}
}
};
public byte[] getHexBytes(String message)
{
int len = message.length() / 2;
char[] chars = message.toCharArray();
String[] hexStr = new String[len];
byte[] bytes = new byte[len];
for (int i = 0, j = 0; j < len; i += 2, j++)
{
hexStr[j] = "" + chars[i] + chars[i + 1];
bytes[j] = (byte) Integer.parseInt(hexStr[j], 16);
}
return bytes;
}
@Override
protected void onDestroy()
{
unregisterReceiver(mReceiver);
super.onDestroy();
}
}
希望尽快解答
