Android蓝牙连接以及数据接收发送
1.加入权限
<uses-feature
android:name="android.hardware.bluetooth_le"
android:required="true" /> <uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
2.代码：
package myapplication.com.myapplicationble; import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast; import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.UUID;
public class MainActivity extends AppCompatActivity { private BluetoothAdapter BA;
BluetoothServerSocket mmServerSocket; private static String address = "20:16:09:26:81:80"; // <==应填写蓝牙串口模块的蓝牙地址。
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
public InputStream inStream = null;
EditText editText;
TextView textView;
Button button, button1;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); initView(); }
/**
* 连接蓝牙
* **/
public void connect() {
BA = BluetoothAdapter.getDefaultAdapter();
BluetoothDevice device = BA.getRemoteDevice(address); // pairedDevices = BA.getBondedDevices();
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
// new ReceiveDatas(btSocket).start();
} catch (IOException e) {
}
BA.cancelDiscovery();
try {
btSocket.connect();
// String s="sm";
outStream = btSocket.getOutputStream();
// outStream.write(s.getBytes());
//outStream.write(0x41); inStream = btSocket.getInputStream();
while (true){
byte[] buffer = new byte[100];
int count = inStream.read(buffer);
int a= inStream.available();
String ss= new String(buffer, 0, count, "utf-8");
System.out.println("***A"+ss);
// 输出信息缺少……不全，占时不会
} } catch (IOException e) {
}
try {
// btSocket.close();
} catch (Exception e2) { // Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
}
} public void initView() { editText = (EditText) findViewById(R.id.edit);
textView = (TextView) findViewById(R.id.textView);
button = (Button) findViewById(R.id.button);
button1 = (Button) findViewById(R.id.button1);
BA = BluetoothAdapter.getDefaultAdapter();
/**
* 连接蓝牙
* */
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("***11");
as();
}
});
/**
* 发送信息
* **/
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String s = editText.getText().toString();
try { // outStream.write(s.getBytes()); 发送数据 outStream = btSocket.getOutputStream();
inStream=btSocket.getInputStream();
outStream.write("sm".getBytes());
outStream.write("\r\n".getBytes()); } catch (IOException e) {
e.printStackTrace();
}
}
}); } /**
*
* 连接蓝牙
* **/
public void as() {
new AsyncTask() { @Override
protected String doInBackground(Object[] params) { connect();
return null;
} @Override
protected void onPreExecute() {
super.onPreExecute();
} @Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT).show();
}
}.execute();
} }
3.操作图
<1>连接后发送数据oooo到蓝牙，接收端显示oooo
<2> 终端发送数据，手机端打印出数据ooooui [oooo]是打印的字符串，ui为接收的数据
修改——-->：
接受数据：
private class ConnectedThread extends Thread {
private final BluetoothSocket socket;
private final InputStream inputStream;
private final OutputStream outputStream;
public ConnectedThread(BluetoothSocket socket) {
this.socket = socket;
InputStream input = null;
OutputStream output = null;
try {
input = socket.getInputStream();
output = socket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
this.inputStream = input;
this.outputStream = output;
}
public void run() {
byte[] buff = new byte[1024];
int bytes;
while (true) {
try {
bytes = inputStream.read(buff);
String str = new String(buff, "ISO-8859-1");
str = str.substring(0, bytes);
Log.e("recv", str);
Message message=handler.obtainMessage();
message.obj=str;
handler.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
break;
}
}
}
public void write(byte[] bytes) {
try {
outputStream.write(bytes);
} catch (IOException e) {
e.printStackTrace();
}
}
public void cancel() {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
---------------------------------------------------------------------------------------------------------------------------------------------------------
完成后代码：
1.权限：
<uses-feature
android:name="android.hardware.bluetooth_le"
android:required="true" /> <uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
2.Activity：
package myapplication.com.myapplicationble; import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast; import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.util.ArrayList;
import java.util.UUID;
public class MainActivity extends AppCompatActivity { private BluetoothAdapter BA;
BluetoothServerSocket mmServerSocket;
String message="";
private static String address = "20:16:09:26:81:80"; // <==应填写蓝牙串口模块的蓝牙地址。
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
public InputStream inStream = null;
EditText editText;
TextView textView;
Button button, button1;
boolean BluetoothFlag;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); initView(); } /**
* 连接蓝牙
**/
public void connect() {
BA = BluetoothAdapter.getDefaultAdapter();
BluetoothDevice device = BA.getRemoteDevice(address); // pairedDevices = BA.getBondedDevices();
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
}
BA.cancelDiscovery();
try {
btSocket.connect();
// String s="sm";
outStream = btSocket.getOutputStream();
//outStream.write(s.getBytes());
//outStream.write(0x41);
inStream = btSocket.getInputStream();
// while (true){
// byte[] buffer = new byte[1];
// int length = 0;
// byte bb = 0;
// String line = null;
// ArrayList<Byte> list = new ArrayList<Byte>();
// while (inStream.read(buffer) == -1) {
// try {
// Thread.sleep(100);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
// System.out.print("-->" +inStream.read(buffer));
// }
// } /***
* 1
* **/
// while (true) {
//
// if(inStream.available()>=0){
// byte[] buffer = new byte[1024];
// int count = inStream.read(buffer);
// // System.out.println("***MAX:" + a);
// String ss = new String(buffer, 0, count, "utf-8");
// System.out.println("*--" + ss);
// }
//
// } /****
* 2
* */ // BluetoothFlag = true;
// MyThread bluetoothThread = new MyThread();
// bluetoothThread.start(); /***
*
* 3
* */ ConnectedThread connectedThread = new ConnectedThread(btSocket);
connectedThread.start(); } catch (IOException e) {
}
try {
// btSocket.close();
} catch (Exception e2) { // Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
}
} public void initView() { editText = (EditText) findViewById(R.id.edit);
textView = (TextView) findViewById(R.id.textView);
button = (Button) findViewById(R.id.button);
button1 = (Button) findViewById(R.id.button1);
BA = BluetoothAdapter.getDefaultAdapter();
/**
* 连接蓝牙
* */
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("***11");
as();
}
});
/**
* 发送信息
* **/
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String s = editText.getText().toString();
try { outStream = btSocket.getOutputStream();
inStream = btSocket.getInputStream();
// outStream.write("\r\n".getBytes());
outStream.write("sm".getBytes());
outStream.write("\r\n".getBytes()); } catch (IOException e) {
e.printStackTrace();
}
}
}); } /**
* 连接蓝牙
**/
public void as() {
new AsyncTask() { @Override
protected String doInBackground(Object[] params) { connect();
return null;
} @Override
protected void onPreExecute() {
super.onPreExecute();
} @Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT).show();
}
}.execute();
} /**
* 在接受不到数据
* **/ private class ConnectedThread extends Thread {
private final BluetoothSocket socket;
private final InputStream inputStream;
private final OutputStream outputStream;
public ConnectedThread(BluetoothSocket socket) {
this.socket = socket;
InputStream input = null;
OutputStream output = null;
try {
input = socket.getInputStream();
output = socket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
this.inputStream = input;
this.outputStream = output;
}
public void run() {
byte[] buff = new byte[1024];
int bytes;
while (true) {
try {
bytes = inputStream.read(buff);
String str = new String(buff, "ISO-8859-1");
str = str.substring(0, bytes);
Log.e("recv", str); Message message=handler.obtainMessage();
message.obj=str;
handler.sendMessage(message);
} catch (IOException e) {
e.printStackTrace();
break;
}
}
}
public void write(byte[] bytes) {
try {
outputStream.write(bytes);
} catch (IOException e) {
e.printStackTrace();
}
}
public void cancel() {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) { String s= (String) msg.obj;
message=message+s;
if(message.contains("RTS_Mon->")){
textView.setText(message); }
}
}; }
3.xml
<?xml version="1.0" encoding="utf-8"?>
<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="myapplication.com.myapplicationble.MainActivity"> <TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
<EditText
android:layout_below="@+id/textView"
android:id="@+id/edit"
android:layout_width="match_parent"
android:textColor="@color/hei"
android:layout_height="wrap_content"/>
<Button
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/button"
android:layout_below="@+id/edit"
android:text="send"
/>
<Button android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/button1"
android:layout_below="@+id/button"
android:text="lianjie"
/> </RelativeLayout>
code:链接：http://pan.baidu.com/s/1jHAL0WI 密码：xvss
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