之前没怎么接触过蓝牙模块，在学习的过程中借鉴了很多前辈的经验。本次主要包含以下功能：
1、检测是否存在蓝牙模块
2、蓝牙的开启与关闭
3、与本机已配对的蓝牙设备
4、本机蓝牙可见性设置
5、扫描周围蓝牙设备
关于蓝牙设备之间如何通讯下次再整理。下面开始介绍。
1.1、首先要在配置文件中加入操作蓝牙的权限
<uses-permission android:name="android.permission.BLUETOOTH"/> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
第一个权限可以控制蓝牙模块的检测、开启与关闭。如果需要扫描周围蓝牙设备等更多功能则需要第二个权限。
1.2、具体代码
btn_check.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
BluetoothAdapter bltadapter = BluetoothAdapter.getDefaultAdapter();//本机适配器
if(bltadapter == null)
{
Toast.makeText(getApplicationContext(), "本机没有蓝牙设备", 0).show();
tv_result.setText("本机没有蓝牙设备");
}
else
{
Toast.makeText(getApplicationContext(), "本机拥有蓝牙设备", 0).show();
tv_result.setText("本机拥有蓝牙设备");
if(!bltadapter.isEnabled())//检测蓝牙是否打开
{
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);//开启蓝牙
startActivity(intent);
}
Set <BluetoothDevice> bltDevices = bltadapter.getBondedDevices();
String address = "已配对蓝牙设备";
if(bltDevices.size()>0)
{
for(Iterator iterator = bltDevices.iterator();iterator.hasNext();)//迭代器收集已适配的蓝牙地址并打印
{
BluetoothDevice bltdevice = (BluetoothDevice)iterator.next();
address = address+"\n"+bltdevice.getAddress().toString();
}
tv_result.setText(address);
}
}
}
});
1.3结果截图
a)初始状态蓝牙未打开
b)请求打开蓝牙
c)显示已配对设备
2.1、设置蓝牙可见性，这里需要说明的是，根据官方介绍
The current default is 120 seconds, and requests over 300 seconds will be capped. These values could change.
即设备可见时间默认为120s，最大为300s，如果参数大于300则等于300。
代码如下
btn_discover.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 400);//400即为设置的可见时间超过300则等于300
startActivity(intent);
}
});
2.2、结果截图如下
3、扫描附近蓝牙。蓝牙本身采用广播机制。代码如下：
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);//过滤器
BluetoothReceiver bluetoothReceiver = new BluetoothReceiver();
registerReceiver(bluetoothReceiver, intentFilter);//注册接受者
private class BluetoothReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action))
{
BluetoothDevice bltdevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
result1 = result1+"\n"+bltdevice.getAddress().toString();
tv_result.setText(result1);
}
}
}
btn_scan.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
bltadapter.startDiscovery();
}
});
3.2、结果截图如下
4、最后附上更改后的全部代码，欢迎批评指正。
java代码
package com.example.bluetooth;
import java.util.Iterator;
import java.util.Set;
import android.support.v7.app.ActionBarActivity;
import android.annotation.SuppressLint;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
TextView tv_result;
Button btn_check;
Button btn_scan;
Button btn_discover;
String result1 = "周围蓝牙设备";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final BluetoothAdapter bltadapter = BluetoothAdapter.getDefaultAdapter();
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
BluetoothReceiver bluetoothReceiver = new BluetoothReceiver();
registerReceiver(bluetoothReceiver, intentFilter);
tv_result = (TextView)findViewById(R.id.CheckResult);
btn_check = (Button)findViewById(R.id.CheckBlt);
btn_scan = (Button)findViewById(R.id.Scan);
btn_discover = (Button)findViewById(R.id.Visable);
btn_check.setOnClickListener(new OnClickListener() {
@SuppressLint("ShowToast")
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
BluetoothAdapter bltadapter = BluetoothAdapter.getDefaultAdapter();
if(bltadapter == null)
{
Toast.makeText(getApplicationContext(), "本机没有蓝牙设备", 0).show();
tv_result.setText("本机没有蓝牙设备");
}
else
{
Toast.makeText(getApplicationContext(), "本机拥有蓝牙设备", 0).show();
tv_result.setText("本机拥有蓝牙设备");
if(!bltadapter.isEnabled())
{
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivity(intent);
}
Set <BluetoothDevice> bltDevices = bltadapter.getBondedDevices();
String address = "已配对蓝牙设备";
if(bltDevices.size()>0)
{
for(Iterator<BluetoothDevice> iterator = bltDevices.iterator();iterator.hasNext();)
{
BluetoothDevice bltdevice = (BluetoothDevice)iterator.next();
address = address+"\n"+bltdevice.getAddress().toString();
}
tv_result.setText(address);
}
}
}
});
btn_discover.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 400);
startActivity(intent);
}
});
btn_scan.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
bltadapter.startDiscovery();
}
});
}
private class BluetoothReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action))
{
BluetoothDevice bltdevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
result1 = result1+"\n"+bltdevice.getAddress().toString();
tv_result.setText(result1);
}
}
}
}
xml代码
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<Button
android:id="@+id/CheckBlt"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:text="检查本机蓝牙"
/>
<Button
android:id="@+id/Visable"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:text="设置可见性"
/>
<Button
android:id="@+id/Scan"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:text="扫描周围蓝牙"
/>
<TextView
android:id="@+id/CheckResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</LinearLayout>
蓝牙主要用的两个类BluetoothAdapter和BluetoothDevice，在通讯方面会用到BluetoothServerSocket。
目前了解的只有这么多了，还要继续努力。
备注：
1、转载请注明出去
2、代码虽然是我写的，但是他自己长歪了，有问题尽量别找我 ~~~~(>_<)~~~~ 。
3、谢谢阅读
