开发手机与单片机通过蓝牙模块

1.xml布局文件

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/widget0"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    xmlns:android="http://schemas.android.com/apk/res/android"    tools:layout_editor_absoluteY="81dp"    tools:layout_editor_absoluteX="0dp">

<Button        android:id="@+id/btnF"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="前进"        tools:layout_constraintTop_creator="1"        tools:layout_constraintRight_creator="1"        app:layout_constraintRight_toRightOf="parent"        android:layout_marginTop="119dp"        tools:layout_constraintLeft_creator="1"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintTop_toTopOf="parent"></Button>

<Button        android:id="@+id/btnL"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginStart="16dp"        android:text="左转"        app:layout_constraintBaseline_toBaselineOf="@+id/btnS"        tools:layout_constraintBaseline_creator="1"        tools:layout_constraintLeft_creator="1"        app:layout_constraintLeft_toLeftOf="parent"        android:layout_marginLeft="16dp"></Button>

<Button        android:id="@+id/btnR"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="右转"        tools:layout_constraintRight_creator="1"        android:layout_marginEnd="6dp"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintBaseline_toBaselineOf="@+id/btnS"        tools:layout_constraintBaseline_creator="1"        android:layout_marginRight="6dp"></Button>

<Button        android:id="@+id/btnB"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="后退"        tools:layout_constraintTop_creator="1"        tools:layout_constraintRight_creator="1"        app:layout_constraintRight_toRightOf="@+id/btnS"        android:layout_marginTop="58dp"        app:layout_constraintTop_toBottomOf="@+id/btnS"        tools:layout_constraintLeft_creator="1"        app:layout_constraintLeft_toLeftOf="@+id/btnS"></Button>

<Button        android:id="@+id/btnS"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="停止"        tools:layout_constraintTop_creator="1"        tools:layout_constraintRight_creator="1"        app:layout_constraintRight_toRightOf="@+id/btnF"        android:layout_marginTop="64dp"        app:layout_constraintTop_toBottomOf="@+id/btnF"        tools:layout_constraintLeft_creator="1"        app:layout_constraintLeft_toLeftOf="@+id/btnF"></Button></android.support.constraint.ConstraintLayout>

2.MainActivity
package com.example.administrator.bluetooth_cmd;

import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothSocket;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.widget.Button;import android.widget.Toast;

import java.io.IOException;import java.io.OutputStream;import java.util.UUID;public class MainActivity extends AppCompatActivity {    private static final String TAG = "THINBTCLIENT";

private static final boolean D = true;

private BluetoothAdapter mBluetoothAdapter = null;

private BluetoothSocket btSocket = null;  //手机蓝牙与蓝牙模块之间的socket

private OutputStream outStream = null;  //发送指令的输出流    Button mButtonF;

Button mButtonB;    Button mButtonL;    Button mButtonR;    Button mButtonS;

private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

private static String address = "00:0C:BF:09:4A:4A"; // <==要连接的蓝牙设备MAC地址

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

btn_function();        init_bluetooth();    }    private void btn_function() {//前进        mButtonF = (Button) findViewById(R.id.btnF);        mButtonF.setOnTouchListener(new Button.OnTouchListener() {

@Override            public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stub                String message;                byte[] msgBuffer;                int action = event.getAction();                switch (action) {                    case MotionEvent.ACTION_DOWN:  //按下了前进按钮                        try {                            outStream = btSocket.getOutputStream();  //通过socket 得到输出流

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "1";  //上位机与下位机约定的指令1表示前进

msgBuffer = message.getBytes();  //因为outputStream 只能传输字节，所以要把字符串指令编程字节流

try {                            outStream.write(msgBuffer);  //将指令写入输出流中。也就是写入socket中

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;

case MotionEvent.ACTION_UP:  //松开了前进按钮，与前面类似，只是指令不同。                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "0";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;                }                return false;            }

});//后退        mButtonB = (Button) findViewById(R.id.btnB);        mButtonB.setOnTouchListener(new Button.OnTouchListener() {

@Override            public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stub                String message;                byte[] msgBuffer;                int action = event.getAction();                switch (action) {                    case MotionEvent.ACTION_DOWN:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "3";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;

case MotionEvent.ACTION_UP:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "0";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;                }

return false;            }

});//左转        mButtonL = (Button) findViewById(R.id.btnL);        mButtonL.setOnTouchListener(new Button.OnTouchListener() {

@Override            public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stub                String message;                byte[] msgBuffer;                int action = event.getAction();                switch (action) {                    case MotionEvent.ACTION_DOWN:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "2";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;

case MotionEvent.ACTION_UP:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "0";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;                }

return false;

}        });//右转        mButtonR = (Button) findViewById(R.id.btnR);        mButtonR.setOnTouchListener(new Button.OnTouchListener() {

@Override            public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stub                String message;                byte[] msgBuffer;                int action = event.getAction();                switch (action) {                    case MotionEvent.ACTION_DOWN:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "4";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;

case MotionEvent.ACTION_UP:                        try {                            outStream = btSocket.getOutputStream();

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                        }

message = "0";

msgBuffer = message.getBytes();

try {                            outStream.write(msgBuffer);

} catch (IOException e) {                            Log.e(TAG, "ON RESUME: Exception during write.", e);                        }                        break;                }

return false;

}

});

//停止        mButtonS = (Button) findViewById(R.id.btnS);        mButtonS.setOnTouchListener(new Button.OnTouchListener() {

@Override            public boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stub                if (event.getAction() == MotionEvent.ACTION_DOWN)                    try {                        outStream = btSocket.getOutputStream();

} catch (IOException e) {                        Log.e(TAG, "ON RESUME: Output stream creation failed.", e);                    }

String message = "0";

byte[] msgBuffer = message.getBytes();

try {                    outStream.write(msgBuffer);

} catch (IOException e) {                    Log.e(TAG, "ON RESUME: Exception during write.", e);                }                return false;            }

});    }    private void init_bluetooth()    {        if (D)Log.e(TAG, "+++ ON CREATE +++");

mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

if (mBluetoothAdapter == null) {            Toast.makeText(this, "Bluetooth is not available.", Toast.LENGTH_LONG).show();            //finish();            return;        }

if (!mBluetoothAdapter.isEnabled()) {            Toast.makeText(this, "Please enable your Bluetooth and re-run this program.", Toast.LENGTH_LONG).show();            finish();            return;

}

if (D)            Log.e(TAG, "+++ DONE IN ON CREATE, GOT LOCAL BT ADAPTER +++");

}

@Override

public void onStart() {

super.onStart();

if (D) Log.e(TAG, "++ ON START ++");    }

@Override

public void onResume() {

super.onResume();        if (D) {            Log.e(TAG, "+ ON RESUME +");            Log.e(TAG, "+ ABOUT TO ATTEMPT CLIENT CONNECT +");

}

BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);

try {

btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);

} catch (IOException e) {

Log.e(TAG, "ON RESUME: Socket creation failed.", e);

}        mBluetoothAdapter.cancelDiscovery();        try {

btSocket.connect();

Log.e(TAG, "ON RESUME: BT connection established, data transfer link open.");

} catch (IOException e) {

try {                btSocket.close();

} catch (IOException e2) {

Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);            }

}

// Create a data stream so we can talk to server.

if (D)            Log.e(TAG, "+ ABOUT TO SAY SOMETHING TO SERVER +");/* try {outStream = btSocket.getOutputStream();

} catch (IOException e) {Log.e(TAG, "ON RESUME: Output stream creation failed.", e);}

String message = "1";

byte[] msgBuffer = message.getBytes();

try {outStream.write(msgBuffer);

} catch (IOException e) {Log.e(TAG, "ON RESUME: Exception during write.", e);}*/

}

@Override

public void onPause() {

super.onPause();

if (D)            Log.e(TAG, "- ON PAUSE -");        if (outStream != null) {            try {                outStream.flush();            } catch (IOException e) {                Log.e(TAG, "ON PAUSE: Couldn‘t flush output stream.", e);            }

}

try {            btSocket.close();        } catch (IOException e2) {            Log.e(TAG, "ON PAUSE: Unable to close socket.", e2);        }

}

@Override

public void onStop() {

super.onStop();

if (D)Log.e(TAG, "-- ON STOP --");

}

@Override

public void onDestroy() {

super.onDestroy();

if (D) Log.e(TAG, "--- ON DESTROY ---");

}}3.修改手机权限manifest.XML
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
4.效果
 

原文地址：https://www.cnblogs.com/zengke556/p/9350187.html

时间： 2024-10-12 17:05:10

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