fork download
copy 
  1. package com.example.chengforapp.myapplication;
  2.  
  3. import android.bluetooth.BluetoothAdapter;
  4. import android.bluetooth.BluetoothDevice;
  5. import android.os.Handler;
  6. import android.support.v7.app.AppCompatActivity;
  7. import android.os.Bundle;
  8. import android.widget.AdapterView;
  9. import android.widget.Button;
  10. import android.widget.Toast;
  11.  
  12. import java.io.IOException;
  13. import java.io.OutputStream;
  14. import java.util.UUID;
  15.  
  16. public class MainActivity extends AppCompatActivity {
  17.  
  18.     @Override
  19.     protected void onCreate(Bundle savedInstanceState) {
  20.         super.onCreate(savedInstanceState);
  21.         setContentView(R.layout.activity_main);
  22.     }
  23. }
  24. public class Trans_page extends AppCompatActivity{
  25.        private Button button_paired ;
  26.        private Button button_disconnect ;
  27.        private Button button_find ;
  28.     private TextView show_data ;
  29.     private ListView event_listView;
  30.     private TextView show_count ;
  31.     private BluetoothAdapter mBluetoothAdapter ;
  32.     private ArrayAdapter<String> deviceName ;
  33.     private ArrayAdapter<String> deviceID ;
  34.     private Set<BluetoothDevice> pairedDevices ;
  35.     private String chooseID ;
  36.     private BluetoothDevice bleDevice ;
  37.     private BluetoothSocket bluesoccket ; //   becareful
  38.     private InputStream mmInputStream ;
  39.     private OutputStream mmOutputStream ;
  40.     Thread workerThread ;
  41.     volatile boolean stopWorker ;
  42.     private int readBufferPosition ;
  43.     private byte[] readBuffer ;
  44.     private String uid ;
  45.     private int count ;
  46.     private LocationManager locMgr ;
  47.     private String bestProv ;
  48.     @Override
  49.  protected void onCreate(Bundle savedInstanceState){
  50.          super.onCreate(savedInstanceState);
  51.          setContentView(R.layout.activity_trans_page);
  52.          getView();
  53.          setListener();
  54.          deviceName = new ArrayAdaapter<String>(this.android.R.layout.simple_expandable_list_item_1);
  55.         deviceID = new ArrayAdapter<String>(this.android.R.layout.simple_expandable_list_item_1);
  56.         count = 0;
  57.     }
  58.      private void getView(){
  59.        button_paired = (Button)findViewById(R.id.btn_paired);
  60.        button_disconnect=(Button)findViewById(R.id.btn_disconn);
  61.        show_data = (TextView)findViewById(R.id.txtShow);
  62.        event_listView=(ListView)findViewById(R.id.Show_B_List);
  63.        button_find = (Button)findViewById(R.id.btn_conn);
  64.        show_count = (TextView)findViewById(R.id.txt_count);
  65.      }
  66.      private void setListener(){
  67.            button_paired.setOnClickListener(new Button.OnClickListener(){
  68.                @Override
  69.                public void onClick(View v){
  70.                     findPBT();
  71.                }
  72.            }) ;
  73.            button_disconnect.setOnClickListener((v)->{
  74.                   try{
  75.                       closeBT();
  76.                   }catch(IOException e){
  77.                        e.printStackTrace();}
  78.            });
  79.            button_find.setOnClickListener(new Button.OnClickListener(){
  80.                @Override
  81.                public void onClick(View v){
  82.                    findPBT();
  83.                }
  84.            });
  85.            event_listView.setAdapter(deviceName);
  86.            event_listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
  87.                @Override
  88.                public void inItemClick(AdapterView<?> parent, View view , int position, long id){
  89.                    choseID=deviceID.getItem(position);
  90.                    try{
  91.                        openBT();
  92.                    }catch (IOException e){
  93.                        e.printStackTrace();
  94.                    }
  95.                    Toast.makeText(Trans_page.this,"選擇了:"+choseID, Toast.LENGTH_SHORT).show();
  96.                    deviceName.clear();
  97.                }
  98.            });
  99.      }
  100.      private void findPBT(){
  101.          mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  102.          if(mBluetoothAdapter != null){
  103.              show_data.setText("No bluetooth adapter available");
  104.          }
  105.          if(!mBluetoothAdapter.isEnabled()){
  106.              Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
  107.              startActivityForResult(enableBluetooth,1);
  108.          }
  109.          pairedDevices=mBluetoothAdapter.getBondedDevices();
  110.          if(pairedDevices.size()>0){
  111.              for(BluetoothDevice device : pairedDevices){
  112.                  Stirng str ="已配對完成的裝置有"+device.getName()+" "+device.getAddress()+"\n";
  113.                  uid = device.getAddress();
  114.                  bleDevice = device ;
  115.              }
  116.              event_listView.setAdapter(deviceName);
  117.          }
  118.      }
  119.      private void openBT() throws IOException{
  120.           UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  121.           if(bleDevice != null){
  122.                bluesoccket = bleDevice.createRfcommSocketToServiceRecord(uuid);
  123.  
  124.                bluesoccket.connect();
  125.                mmOutputStream = bluesoccket.getOutputStream();
  126.                mmInputStream = bluesoccket.getInputStream();
  127.                beginListenForData();
  128.                show_data.setText("Bluetooth Opened:"+bleDevice.getName()+""+bleDevice.getAddress());
  129.           }
  130.      }
  131.      private void beginListenForData(){
  132.           final Handler handler = new Handler();
  133.           final byte delimiter = 10 ;
  134.  
  135.           stopWorker = false ;
  136.           readBufferPosition = 0 ;
  137.           readBuffer = new byte[1024];
  138.           workerThread = new Thread((Runnable)()->{
  139.               while(!Thread.currentThread().isInterrupted()&&!stopWorker)
  140.               {
  141.                   try{
  142.                        int bytesAvailable = mmInputStream.available();
  143.                        if(bytesAvailable>0)
  144.                        {
  145.                             byte[] packetBytes = new byte[bytesAvailable];
  146.                             mmInputStream.read(packetBytes);
  147.                             for(int i = 0;i<bytesAvailable ; i++){
  148.                                 byte b = packetBytes[i];
  149.                                 if(b==delimiter){
  150.                                     byte[] encodedBytes = new byte[readBufferPosition];
  151.                                     System.arraycopy(readBuffer,0,encodedBytes,0,encodedBytes.length);
  152.                                     final String data = new String(encodedBytes,"US-ASCII");
  153.                                     readBufferPosition = 0;
  154.                                     count++;
  155.                                     handler.post(()->{
  156.                                         String prevString = show_data.getText().toString();
  157.                                         String dataText = String.format("%s\nCF=1,PM2.5=%sug/m3,收到了第%s筆資料",prevString,data,count);
  158.                                         show_data.setText(dataText);
  159.                                     });
  160.                                 }else
  161.                                 {
  162.                                     readBuffer[readBufferPosition++]=b;
  163.                                 }
  164.                             }
  165.                        }
  166.                   } catch (IOException ex){
  167.                        stopWorker = true ;
  168.                   }
  169.               }
  170.           });
  171.      }
  172.      private void closeBT() throws  IOException{
  173.          stopWorker = true ;
  174.          mmOutputStream.close();
  175.          mmInputStream.close();
  176.          bluesoccket.clsoe();
  177.          deviceName.clear();
  178.          show_count.setText("");
  179.          show_data.setText("Bluetooth Closed");
  180.      }
  181. }
  182.  
Success #stdin #stdout 0.09s 27896KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/2woolx
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!