androidsppxdp

⑴ 如何用Android Studio修改蓝牙串口助手的波特率（手机端）

BluetoothChatService.java
的第49行
private static final UUID MY_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
中的字符串不同，于是把他替换成蓝牙串口服务 (SPP) 的 UUID
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
保存后运行程序到手机上，把电脑上的蓝牙打开，打开电脑上的串口助手，波特率随便设置就可以了 。

⑵ android开发SPP经典蓝牙

Android 开发SPP经典蓝牙。

1、传统蓝牙采用的是SPP（Serial Port Profile）协议进行数据传输。

2、SPP的UUID：00001101-0000-1000-8000-00805F9B34FB

3、手机一般以客户端的角色主动连接SPP协议设备

概念：

BluetoothAdapter:

本地蓝牙适配器，是所有蓝牙交互的入口，表示蓝牙设备自身的一个蓝牙适配器，整个系统只有一个蓝牙适配器，通过他可以发现其他蓝牙设备，查询绑定（配对）设备列表，使用MAC地址实例化BluetoothDevice以及创建BluetoothServerSocket用来侦听来自其他设备的通信。

myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//获取默认的蓝牙Adapter

BluetoothDevice:

远程的蓝牙设备。

private static BluetoothDevice myDevice;

myDevice = myBluetoothAdapter.getRemoteDevice(BDAddr);//获取远程设备,通过蓝牙的MAC地址来获取一个远程对象

两种连接方式

BluetoothSocket

客户端：调用BluetoothDevice的()可以获取该对象;调用connect()方法可以建立连接。

private static BluetoothSocket mySocket = null;

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

Method m = myDevice.getClass().getMethod("createRfcommSocket", new Class[] {int.class});//由BluetoothDevice衍生出BluetoothSocket, createRfcommSocket来选择连接的服务和协议

mySocket = (BluetoothSocket) m.invoke(myDevice, 1);

BluetoothServerSocket：

服务端：通过BluetoothServerSocket对象可以创建BluetoothSocket对象，调用BluetoothServerSocket的accept()的方法可以得到改对象。

开发流程：

1：声明权限：

<uses-permission android:name="android.permission.BLUETOOTH"/>

<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

2：启动和关闭蓝牙

获取蓝牙适配器，使用close()接口可以关闭蓝牙适配器

myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//获取默认的蓝牙Adapter

启动蓝牙

if (!blueadapter.isEnabled())

        //判断本机蓝牙是否打开

        {//如果没打开，则打开蓝牙

        blueadapter.enable();

        }

3.使用BlueAdatper搜索 

使用bluetoothAdapter搜索设备，bluetoothAdapter.startDiscovery()在搜索过程中，系统会发出三个广播信息: 

ACTION_DISCOVERY_START：开始搜索 

ACTION_DISCOVERY_FINISHED：搜索结束 

ACTION_FOUND：找到设备

if (bluetoothAdapter.isDiscovering()) {

        bluetoothAdapter.cancelDiscovery();//如果蓝牙设备未连接则取消搜索

    }

    bluetoothAdapter.startDiscovery();

}

4：(1)通过注册广播获取搜索到的设备。

IntentFilter intentFilter = new IntentFilter();

intentFilter.addAction(BluetoothDevice.ACTION_FOUND);//找到设备广播

intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//搜索完成广播

registerReceiver(receiver, intentFilter);//注册广播接收器

// receiver

private final BroadcastReceiver receiver = new BroadcastReceiver(){

    @Override

    public void onReceive(Context context, Intent intent) {

        String action = intent.getAction();

        if (BluetoothDevice.ACTION_FOUND.equals(action)) {

            // find a device

            BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

            if (device.getBondState() != BluetoothDevice.BOND_BONDED) {

                //未配对设备

                newDeviceArrayAdapter.add(device.getName() + "\n" + device.getAddress());

            }else {

                //已经配对过的设备

                TextView tvPaired = (TextView)findViewById(R.id.tv_paired);

                tvPaired.setVisibility(View.VISIBLE);

                lvPairedDevices.setVisibility(View.VISIBLE);

                pairedDeviceArrayAdapter.add(device.getName() + "\n" + device.getAddress());

            }

            Log.i(TAG,"name:" + device.getName() + " address"+ device.getAddress());

        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action){

            // search finish

            Log.i(TAG, "search finish!");

        }

    }

};

(2),直接得到当前的蓝牙设备后，就可用通过遍历pairedDevices ，得到当前手机已经配对过的蓝牙设备。

Set<BluetoothDevice> pairedDevices = myBluetoothAdapter.getBondedDevices();//获取当前蓝牙设备

if (pairedDevices.size() <= 0) return false;

for (BluetoothDevice device : pairedDevices) {

    Map<String, String> map = new HashMap<String, String>();

    map.put("DeviceName", device.getName());

    map.put("BDAddress", device.getAddress());

    list.add(map);

5.建立连接

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

Method m = myDevice.getClass().getMethod("createRfcommSocket", new Class[] {int.class});//由BluetoothDevice衍生出BluetoothSocket, createRfcommSocket来选择连接的服务和协议

mySocket = (BluetoothSocket) m.invoke(myDevice, 1);

mySocket.connect();//使用BluetoothSocket来连接设备

6.把得到的蓝牙设备给通过点击ListView选择设备。

listView.setOnItemClickListener(new ListView.OnItemClickListener() {

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

        SelectedBDAddress = list.get(arg2).get("BDAddress");

        if (((ListView) arg0).getTag() != null) {

            ((View) ((ListView) arg0).getTag()).setBackgroundDrawable(null);

        }

        ((ListView) arg0).setTag(arg1);

        arg1.setBackgroundColor(Color.BLUE);

        myDevice = myBluetoothAdapter.getRemoteDevice(SelectedBDAddress);

    }

});

7.客户端发送数据

当两个设备成功连接之后，双方都会有一个BluetoothSocket对象，这时，就可以在设备之间传送数据了。

       1.使用getOutputStream（）方法来获取输出流来处理传输。

       2.调用write（）。

os = socket.getOutputStream();//获取输出流

if (os != null) {//判断输出流是否为空

    os.write(message.getBytes("UTF-8"));

}

os.flush();//将输出流的数据强制提交

os.close();//关闭输出流

}

将输出流中的数据提交后，要记得关闭输出流，否则，可能会造成只能发送一次数据。

8.服务端接收数据

1.使用getInputStream（）方法来获取输入流来处理传输。

       2.调用read()。

InputStream im=null;

im=bluetoothSocket.getInputStream();

byte buf[] = new byte[1024];

if (is != null) {

    is.read(buf, 0, buf.length);//读取发来的数据

    String message = new String(buf);//把发来的数据转化为String类型

    BuletoothMainActivity.UpdateRevMsg(message);//更新信息在显示文本框

    is.close();//关闭输入流

使用服务端接收数据时，要先从客户端向服务端发起连接，只有接收到连接请求之后，才会返回一个BluetoothSocket对象。有BluetoothSocket对象才能获取到输入流。

⑶ android setdata 怎么匹配配置文件

====================== 常用 type =========================

一、music：

String file_type = "audio/*";

二、movice：

String file_type = "video/*";

三、pdf：

String file_type = "application/*";

四、picture：

String file_type = "image/*";

================================================

".*"="application/octet-stream"
".001"="application/x-001"
".301"="application/x-301"
".323"="text/h323"
".906"="application/x-906"
".907"="drawing/907"
".a11"="application/x-a11"
".acp"="audio/x-mei-aac"
".ai"="application/postscript"
".aif"="audio/aiff"
".aifc"="audio/aiff"
".aiff"="audio/aiff"
".anv"="application/x-anv"
".asa"="text/asa"
".asf"="video/x-ms-asf"
".asp"="text/asp"
".asx"="video/x-ms-asf"
".au"="audio/basic"
".avi"="video/avi"
".awf"="application/vnd.adobe.workflow"
".biz"="text/xml"
".bmp"="application/x-bmp"
".bot"="application/x-bot"
".c4t"="application/x-c4t"
".c90"="application/x-c90"
".cal"="application/x-cals"
".cat"="application/vnd.ms-pki.seccat"
".cdf"="application/x-netcdf"
".cdr"="application/x-cdr"
".cel"="application/x-cel"
".cer"="application/x-x509-ca-cert"
".cg4"="application/x-g4"
".cgm"="application/x-cgm"
".cit"="application/x-cit"
".class"="java/*"
".cml"="text/xml"
".cmp"="application/x-cmp"
".cmx"="application/x-cmx"
".cot"="application/x-cot"
".crl"="application/pkix-crl"
".crt"="application/x-x509-ca-cert"
".csi"="application/x-csi"
".css"="text/css"
".cut"="application/x-cut"
".dbf"="application/x-dbf"
".dbm"="application/x-dbm"
".dbx"="application/x-dbx"
".dcd"="text/xml"
".dcx"="application/x-dcx"
".der"="application/x-x509-ca-cert"
".dgn"="application/x-dgn"
".dib"="application/x-dib"
".dll"="application/x-msdownload"
".doc"="application/msword"
".dot"="application/msword"
".drw"="application/x-drw"
".dtd"="text/xml"
".dwf"="Model/vnd.dwf"
".dwf"="application/x-dwf"
".dwg"="application/x-dwg"
".dxb"="application/x-dxb"
".dxf"="application/x-dxf"
".edn"="application/vnd.adobe.edn"
".emf"="application/x-emf"
".eml"="message/rfc822"
".ent"="text/xml"
".epi"="application/x-epi"
".eps"="application/x-ps"
".eps"="application/postscript"
".etd"="application/x-ebx"
".exe"="application/x-msdownload"
".fax"="image/fax"
".fdf"="application/vnd.fdf"
".fif"="application/fractals"
".fo"="text/xml"
".frm"="application/x-frm"
".g4"="application/x-g4"
".gbr"="application/x-gbr"
".gcd"="application/x-gcd"
".gif"="image/gif"
".gl2"="application/x-gl2"
".gp4"="application/x-gp4"
".hgl"="application/x-hgl"
".hmr"="application/x-hmr"
".hpg"="application/x-hpgl"
".hpl"="application/x-hpl"
".hqx"="application/mac-binhex40"
".hrf"="application/x-hrf"
".hta"="application/hta"
".htc"="text/x-component"
".htm"="text/html"
".html"="text/html"
".htt"="text/webviewhtml"
".htx"="text/html"
".icb"="application/x-icb"
".ico"="image/x-icon"
".ico"="application/x-ico"
".iff"="application/x-iff"
".ig4"="application/x-g4"
".igs"="application/x-igs"
".iii"="application/x-iphone"
".img"="application/x-img"
".ins"="application/x-internet-signup"
".isp"="application/x-internet-signup"
".IVF"="video/x-ivf"
".java"="java/*"
".jfif"="image/jpeg"
".jpe"="image/jpeg"
".jpe"="application/x-jpe"
".jpeg"="image/jpeg"
".jpg"="image/jpeg"
".jpg"="application/x-jpg"
".js"="application/x-javascript"
".jsp"="text/html"
".la1"="audio/x-liquid-file"
".lar"="application/x-laplayer-reg"
".latex"="application/x-latex"
".lavs"="audio/x-liquid-secure"
".lbm"="application/x-lbm"
".lmsff"="audio/x-la-lms"
".ls"="application/x-javascript"
".ltr"="application/x-ltr"
".m1v"="video/x-mpeg"
".m2v"="video/x-mpeg"
".m3u"="audio/mpegurl"
".m4e"="video/mpeg4"
".mac"="application/x-mac"
".man"="application/x-troff-man"
".math"="text/xml"
".mdb"="application/msaccess"
".mdb"="application/x-mdb"
".mfp"="application/x-shockwave-flash"
".mht"="message/rfc822"
".mhtml"="message/rfc822"
".mi"="application/x-mi"
".mid"="audio/mid"
".midi"="audio/mid"
".mil"="application/x-mil"
".mml"="text/xml"
".mnd"="audio/x-musicnet-download"
".mns"="audio/x-musicnet-stream"
".mocha"="application/x-javascript"
".movie"="video/x-sgi-movie"
".mp1"="audio/mp1"
".mp2"="audio/mp2"
".mp2v"="video/mpeg"
".mp3"="audio/mp3"
".mp4"="video/mpeg4"
".mpa"="video/x-mpg"
".mpd"="application/vnd.ms-project"
".mpe"="video/x-mpeg"
".mpeg"="video/mpg"
".mpg"="video/mpg"
".mpga"="audio/rn-mpeg"
".mpp"="application/vnd.ms-project"
".mps"="video/x-mpeg"
".mpt"="application/vnd.ms-project"
".mpv"="video/mpg"
".mpv2"="video/mpeg"
".mpw"="application/vnd.ms-project"
".mpx"="application/vnd.ms-project"
".mtx"="text/xml"
".mxp"="application/x-mmxp"
".net"="image/pnetvue"
".nrf"="application/x-nrf"
".nws"="message/rfc822"
".odc"="text/x-ms-odc"
".out"="application/x-out"
".p10"="application/pkcs10"
".p12"="application/x-pkcs12"
".p7b"="application/x-pkcs7-certificates"
".p7c"="application/pkcs7-mime"
".p7m"="application/pkcs7-mime"
".p7r"="application/x-pkcs7-certreqresp"
".p7s"="application/pkcs7-signature"
".pc5"="application/x-pc5"
".pci"="application/x-pci"
".pcl"="application/x-pcl"
".pcx"="application/x-pcx"
".pdf"="application/pdf"
".pdf"="application/pdf"
".pdx"="application/vnd.adobe.pdx"
".pfx"="application/x-pkcs12"
".pgl"="application/x-pgl"
".pic"="application/x-pic"
".pko"="application/vnd.ms-pki.pko"
".pl"="application/x-perl"
".plg"="text/html"
".pls"="audio/scpls"
".plt"="application/x-plt"
".png"="image/png"
".png"="application/x-png"
".pot"="application/vnd.ms-powerpoint"
".ppa"="application/vnd.ms-powerpoint"
".ppm"="application/x-ppm"
".pps"="application/vnd.ms-powerpoint"
".ppt"="application/vnd.ms-powerpoint"
".ppt"="application/x-ppt"
".pr"="application/x-pr"
".prf"="application/pics-rules"
".prn"="application/x-prn"
".prt"="application/x-prt"
".ps"="application/x-ps"
".ps"="application/postscript"
".ptn"="application/x-ptn"
".pwz"="application/vnd.ms-powerpoint"
".r3t"="text/vnd.rn-realtext3d"
".ra"="audio/vnd.rn-realaudio"
".ram"="audio/x-pn-realaudio"
".ras"="application/x-ras"
".rat"="application/rat-file"
".rdf"="text/xml"
".rec"="application/vnd.rn-recording"
".red"="application/x-red"
".rgb"="application/x-rgb"
".rjs"="application/vnd.rn-realsystem-rjs"
".rjt"="application/vnd.rn-realsystem-rjt"
".rlc"="application/x-rlc"
".rle"="application/x-rle"
".rm"="application/vnd.rn-realmedia"
".rmf"="application/vnd.adobe.rmf"
".rmi"="audio/mid"
".rmj"="application/vnd.rn-realsystem-rmj"
".rmm"="audio/x-pn-realaudio"
".rmp"="application/vnd.rn-rn_music_package"
".rms"="application/vnd.rn-realmedia-secure"
".rmvb"="application/vnd.rn-realmedia-vbr"
".rmx"="application/vnd.rn-realsystem-rmx"
".rnx"="application/vnd.rn-realplayer"
".rp"="image/vnd.rn-realpix"
".rpm"="audio/x-pn-realaudio-plugin"
".rsml"="application/vnd.rn-rsml"
".rt"="text/vnd.rn-realtext"
".rtf"="application/msword"
".rtf"="application/x-rtf"
".rv"="video/vnd.rn-realvideo"
".sam"="application/x-sam"
".sat"="application/x-sat"
".sdp"="application/sdp"
".sdw"="application/x-sdw"
".sit"="application/x-stuffit"
".slb"="application/x-slb"
".sld"="application/x-sld"
".slk"="drawing/x-slk"
".smi"="application/smil"
".smil"="application/smil"
".smk"="application/x-smk"
".snd"="audio/basic"
".sol"="text/plain"
".sor"="text/plain"
".spc"="application/x-pkcs7-certificates"
".spl"="application/futuresplash"
".spp"="text/xml"
".ssm"="application/streamingmedia"
".sst"="application/vnd.ms-pki.certstore"
".stl"="application/vnd.ms-pki.stl"
".stm"="text/html"
".sty"="application/x-sty"
".svg"="text/xml"
".swf"="application/x-shockwave-flash"
".tdf"="application/x-tdf"
".tg4"="application/x-tg4"
".tga"="application/x-tga"
".tif"="image/tiff"
".tif"="application/x-tif"
".tiff"="image/tiff"
".tld"="text/xml"
".top"="drawing/x-top"
".torrent"="application/x-bittorrent"
".tsd"="text/xml"
".txt"="text/plain"
".uin"="application/x-icq"
".uls"="text/iuls"
".vcf"="text/x-vcard"
".vda"="application/x-vda"
".vdx"="application/vnd.visio"
".vml"="text/xml"
".vpg"="application/x-vpeg005"
".vsd"="application/vnd.visio"
".vsd"="application/x-vsd"
".vss"="application/vnd.visio"
".vst"="application/vnd.visio"
".vst"="application/x-vst"
".vsw"="application/vnd.visio"
".vsx"="application/vnd.visio"
".vtx"="application/vnd.visio"
".vxml"="text/xml"
".wav"="audio/wav"
".wax"="audio/x-ms-wax"
".wb1"="application/x-wb1"
".wb2"="application/x-wb2"
".wb3"="application/x-wb3"
".wbmp"="image/vnd.wap.wbmp"
".wiz"="application/msword"
".wk3"="application/x-wk3"
".wk4"="application/x-wk4"
".wkq"="application/x-wkq"
".wks"="application/x-wks"
".wm"="video/x-ms-wm"
".wma"="audio/x-ms-wma"
".wmd"="application/x-ms-wmd"
".wmf"="application/x-wmf"
".wml"="text/vnd.wap.wml"
".wmv"="video/x-ms-wmv"
".wmx"="video/x-ms-wmx"
".wmz"="application/x-ms-wmz"
".wp6"="application/x-wp6"
".wpd"="application/x-wpd"
".wpg"="application/x-wpg"
".wpl"="application/vnd.ms-wpl"
".wq1"="application/x-wq1"
".wr1"="application/x-wr1"
".wri"="application/x-wri"
".wrk"="application/x-wrk"
".ws"="application/x-ws"
".ws2"="application/x-ws"
".wsc"="text/scriptlet"
".wsdl"="text/xml"
".wvx"="video/x-ms-wvx"
".xdp"="application/vnd.adobe.xdp"
".xdr"="text/xml"
".xfd"="application/vnd.adobe.xfd"
".xfdf"="application/vnd.adobe.xfdf"
".xhtml"="text/html"
".xls"="application/vnd.ms-excel"
".xls"="application/x-xls"
".xlw"="application/x-xlw"
".xml"="text/xml"
".xpl"="audio/scpls"
".xq"="text/xml"
".xql"="text/xml"
".xquery"="text/xml"
".xsd"="text/xml"
".xsl"="text/xml"
".xslt"="text/xml"
".xwd"="application/x-xwd"
".x_b"="application/x-x_b"
".x_t"="application/x-x_t"

⑷ android程序连接蓝牙打印机.对打印机的型号有什么要求吗

看你是想用什么协议连接打印机了，建议用SPP协议，BLE协议不适合向打印机传输数据，我做的项目对型号没有要求，能兼容佳博和合杰等品牌的小票打印机和标签打印机

⑸ Android app签名不成功的方法

直接通过Open Mole Settings设置的Android Studio签名配置，每次编译后签名和已经内置在system/spp目录下的已签名应用不同。

解决的方法：参考下面链接的第一种方法。

https://www.jianshu.com/p/400df0d3d882?utm_campaign=maleskine&utm_content=note&utm_medium=seo_notes&utm_source=recommendation