androidsppxdp

⑴ 如何用Android Studio修改藍牙串口助手的波特率（手機端）

BluetoothChatService.java
的第49行
private static final UUID MY_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
中的字元串不同，於是把他替換成藍牙串口服務 (SPP) 的 UUID
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
保存後運行程序到手機上，把電腦上的藍牙打開，打開電腦上的串口助手，波特率隨便設置就可以了 。

⑵ android開發SPP經典藍牙

Android 開發SPP經典藍牙。

1、傳統藍牙採用的是SPP（Serial Port Profile）協議進行數據傳輸。

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

3、手機一般以客戶端的角色主動連接SPP協議設備

概念：

BluetoothAdapter:

本地藍牙適配器，是所有藍牙交互的入口，表示藍牙設備自身的一個藍牙適配器，整個系統只有一個藍牙適配器，通過他可以發現其他藍牙設備，查詢綁定（配對）設備列表，使用MAC地址實例化BluetoothDevice以及創建BluetoothServerSocket用來偵聽來自其他設備的通信。

myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//獲取默認的藍牙Adapter

BluetoothDevice:

遠程的藍牙設備。

private static BluetoothDevice myDevice;

myDevice = myBluetoothAdapter.getRemoteDevice(BDAddr);//獲取遠程設備,通過藍牙的MAC地址來獲取一個遠程對象

兩種連接方式

BluetoothSocket

客戶端：調用BluetoothDevice的()可以獲取該對象;調用connect()方法可以建立連接。

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來選擇連接的服務和協議

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

BluetoothServerSocket：

服務端：通過BluetoothServerSocket對象可以創建BluetoothSocket對象，調用BluetoothServerSocket的accept()的方法可以得到改對象。

開發流程：

1：聲明許可權：

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

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

2：啟動和關閉藍牙

獲取藍牙適配器，使用close()介面可以關閉藍牙適配器

myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//獲取默認的藍牙Adapter

啟動藍牙

if (!blueadapter.isEnabled())

        //判斷本機藍牙是否打開

        {//如果沒打開，則打開藍牙

        blueadapter.enable();

        }

3.使用BlueAdatper搜索 

使用bluetoothAdapter搜索設備，bluetoothAdapter.startDiscovery()在搜索過程中，系統會發出三個廣播信息: 

ACTION_DISCOVERY_START：開始搜索 

ACTION_DISCOVERY_FINISHED：搜索結束 

ACTION_FOUND：找到設備

if (bluetoothAdapter.isDiscovering()) {

        bluetoothAdapter.cancelDiscovery();//如果藍牙設備未連接則取消搜索

    }

    bluetoothAdapter.startDiscovery();

}

4：(1)通過注冊廣播獲取搜索到的設備。

IntentFilter intentFilter = new IntentFilter();

intentFilter.addAction(BluetoothDevice.ACTION_FOUND);//找到設備廣播

intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//搜索完成廣播

registerReceiver(receiver, intentFilter);//注冊廣播接收器

// 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) {

                //未配對設備

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

            }else {

                //已經配對過的設備

                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),直接得到當前的藍牙設備後，就可用通過遍歷pairedDevices ，得到當前手機已經配對過的藍牙設備。

Set<BluetoothDevice> pairedDevices = myBluetoothAdapter.getBondedDevices();//獲取當前藍牙設備

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.建立連接

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來選擇連接的服務和協議

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

mySocket.connect();//使用BluetoothSocket來連接設備

6.把得到的藍牙設備給通過點擊ListView選擇設備。

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.客戶端發送數據

當兩個設備成功連接之後，雙方都會有一個BluetoothSocket對象，這時，就可以在設備之間傳送數據了。

       1.使用getOutputStream（）方法來獲取輸出流來處理傳輸。

       2.調用write（）。

os = socket.getOutputStream();//獲取輸出流

if (os != null) {//判斷輸出流是否為空

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

}

os.flush();//將輸出流的數據強制提交

os.close();//關閉輸出流

}

將輸出流中的數據提交後，要記得關閉輸出流，否則，可能會造成只能發送一次數據。

8.服務端接收數據

1.使用getInputStream（）方法來獲取輸入流來處理傳輸。

       2.調用read()。

InputStream im=null;

im=bluetoothSocket.getInputStream();

byte buf[] = new byte[1024];

if (is != null) {

    is.read(buf, 0, buf.length);//讀取發來的數據

    String message = new String(buf);//把發來的數據轉化為String類型

    BuletoothMainActivity.UpdateRevMsg(message);//更新信息在顯示文本框

    is.close();//關閉輸入流

使用服務端接收數據時，要先從客戶端向服務端發起連接，只有接收到連接請求之後，才會返回一個BluetoothSocket對象。有BluetoothSocket對象才能獲取到輸入流。

⑶ android setdata 怎麼匹配配置文件

====================== 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程序連接藍牙列印機.對列印機的型號有什麼要求嗎

看你是想用什麼協議連接列印機了，建議用SPP協議，BLE協議不適合向列印機傳輸數據，我做的項目對型號沒有要求，能兼容佳博和合傑等品牌的小票列印機和標簽列印機

⑸ Android app簽名不成功的方法

直接通過Open Mole Settings設置的Android Studio簽名配置，每次編譯後簽名和已經內置在system/spp目錄下的已簽名應用不同。

解決的方法：參考下面鏈接的第一種方法。

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