大学课程设计，编写蓝牙透传app时候，再发送一个信息蓝牙就断开连接

Question

如题，我最近在做课程设计，题目是基于STM32的一个猫屋设计，主要是一个PWM风扇控制，和一个远程投喂功能。 再加个基于BT05的蓝牙透传APP。APP做到一半，PWM风扇做好了，但是想加个定时远程投喂加不上，思路是定时中断STM32，从而达到投喂功能。
1. 遇到的问题：APP能设置温度的上下限，读取实时温度，上下限温度。但是再想读取一个投喂间隔或者设置投喂间隔就会自动断开蓝牙连接

这是我的APP界面。就是如果读取投喂间隔或者按最后一个按钮——设置投喂间隔，就会断开蓝牙，返回扫描蓝牙界面。

请各位前辈指教。我不知道怎么修改。

下面是我的DeviceCnotrolActivity.java的代码。谢谢。

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.bluetooth.le;

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattService;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ExpandableListView;
import android.widget.TextView;
import android.widget.Toast;

/**
 * For a given BLE device, this Activity provides the user interface to connect, display data,
 * and display GATT services and characteristics supported by the device.  The Activity
 * communicates with {@code BluetoothLeService}, which in turn interacts with the
 * Bluetooth LE API.
 */
public class DeviceControlActivity extends Activity {
    private final static String TAG = DeviceControlActivity.class.getSimpleName();

    public static final String EXTRAS_DEVICE_NAME = "DEVICE_NAME";
    public static final String EXTRAS_DEVICE_ADDRESS = "DEVICE_ADDRESS";

    private TextView mConnectionState;
    private TextView mDataField;
    private TextView mDataTemptured;//显示温度
    private TextView mSetTemptured;//设置温度
    private TextView mSetLTemptured;//设置温度 下限
    private TextView mFenSuRang;//风扇档位

    private String mDeviceName;

    private String mDeviceAddress;
    private ExpandableListView mGattServicesList;
    private BluetoothLeService mBluetoothLeService;
    private ArrayList<ArrayList<BluetoothGattCharacteristic>> mGattCharacteristics =
            new ArrayList<ArrayList<BluetoothGattCharacteristic>>();
    private boolean mConnected = false;
    private BluetoothGattCharacteristic mNotifyCharacteristic;


    boolean connect_status_bit=false;

    private final String LIST_NAME = "NAME";
    private final String LIST_UUID = "UUID";
    private final String g_TitleName = "智能温度控制设计";



    private final String g_EndByte= "0E";
    private final String g_SetHADDR = "0A0B02";
    private final String g_SetLADDR = "0A0B03";
    private Handler mHandler;

    // Stops scanning after 10 seconds.
    private static final long SCAN_PERIOD = 1000;

    private int i = 0;  
    private int TIME = 1000; 


    // Code to manage Service lifecycle.
    private final ServiceConnection mServiceConnection = new ServiceConnection() {

        @Override
        public void onServiceConnected(ComponentName componentName, IBinder service) {
            mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();
            if (!mBluetoothLeService.initialize()) {
                Log.e(TAG, "Unable to initialize Bluetooth");
                finish();
            }
            // Automatically connects to the device upon successful start-up initialization.
            mBluetoothLeService.connect(mDeviceAddress);
        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            mBluetoothLeService = null;
        }
    };

    // Handles various events fired by the Service.
    // ACTION_GATT_CONNECTED: connected to a GATT server.
    // ACTION_GATT_DISCONNECTED: disconnected from a GATT server.
    // ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services.
    // ACTION_DATA_AVAILABLE: received data from the device.  This can be a result of read
    //                        or notification operations.
    private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
                //mConnected = true;


                connect_status_bit=true;

                invalidateOptionsMenu();
            } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
                mConnected = false;

                updateConnectionState(R.string.disconnected);
                connect_status_bit=false;
                show_view(false);
                invalidateOptionsMenu();
                clearUI();
            } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
                // Show all the supported services and characteristics on the user interface.
                displayGattServices(mBluetoothLeService.getSupportedGattServices());
            } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
                displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA));
            }
        }
    };

    // If a given GATT characteristic is selected, check for supported features.  This sample
    // demonstrates 'Read' and 'Notify' features.  See
    // http://d.android.com/reference/android/bluetooth/BluetoothGatt.html for the complete
    // list of supported characteristic features.
    private final ExpandableListView.OnChildClickListener servicesListClickListner =
            new ExpandableListView.OnChildClickListener() {
                @Override
                public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,
                                            int childPosition, long id) {


                    return false;
                }
    };

    private void clearUI() {
        //mGattServicesList.setAdapter((SimpleExpandableListAdapter) null);
        mDataField.setText(R.string.no_data);
    }

    Button send_button; //发送上限温度按键
    Button send_Lowbutton; //发送下限温度按键
    Button send_feedbutton; //发送投喂按键
    Button enable_button;
    Button IBeacon_set_button;

    EditText txd_txt,uuid_1001_ed;
    EditText txd_txtLowTempture; //下限显示文本
    EditText txd_txtfeedtime; //投喂间隔显示文本
    EditText ibeacon_uuid;
    EditText mayjor_txt,minor_txt;

    EditText dev_Name;
    Button name_button;

    EditText password_ed;//密码值
    Button password_enable_bt;//密码开关
    Button password_wrt;//密码写入Button

    Button adv_time1,adv_time2,adv_time3,adv_time4;

    boolean pass_en=false;

    Button clear_button;


    private Button IO_H_button,IO_L_button;//out io
    Timer timer = new Timer();  


    void show_view( boolean p )
    {
        if(p){
            send_button.setEnabled(true);
            send_Lowbutton.setEnabled(true);
            send_feedbutton.setEnabled(true);

        }else{
            send_button.setEnabled(false);
            send_Lowbutton.setEnabled(false);
            send_feedbutton.setEnabled(false);

        }
    }

    public void delay(int ms){
        try {
            Thread.currentThread();
            Thread.sleep(ms);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } 
     }  

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.gatt_services_characteristics);

        final Intent intent = getIntent();
        mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME);
        mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS);

        // Sets up UI references.
        ((TextView) findViewById(R.id.device_address)).setText(mDeviceAddress);
        //mGattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list);
       // mGattServicesList.setOnChildClickListener(servicesListClickListner);
        mConnectionState = (TextView) findViewById(R.id.connection_state);
     //   mDataField = (TextView) findViewById(R.id.data_value);
        mDataTemptured = (TextView) findViewById(R.id.rx_Tempture);
        mSetTemptured= (TextView) findViewById(R.id.ARM_Tempture);
        mSetLTemptured= (TextView) findViewById(R.id.L_Tempture);
        mFenSuRang= (TextView) findViewById(R.id.rx_FenRang);


        send_button=(Button)findViewById(R.id.tx_SetHbutton);//send data 1002
        send_button.setOnClickListener(listener);//设置监听  

        send_Lowbutton = (Button)findViewById(R.id.tx_SetLbutton);//send data 1002
        send_Lowbutton.setOnClickListener(listener);//设置监听  

        send_feedbutton=(Button)findViewById(R.id.tx_SetFbutton);//send data 1002
        send_feedbutton.setOnClickListener(listener);//设置监听  
//        clear_button=(Button)findViewById(R.id.clear_button);//send data 1002
//        clear_button.setOnClickListener(listener);//设置监听  

        txd_txt=(EditText)findViewById(R.id.tx_text);//1002 data
        txd_txt.setText("28");

        txd_txtLowTempture=(EditText)findViewById(R.id.tx_dispLTemptuer);//1002 data
        txd_txtLowTempture.setText("15");

       // rx_data_id_1=(EditText)findViewById(R.id.rx_data_id_1);//1002 data
//        rx_data_id_1.setText("");



        show_view(false);
        mHandler = new Handler();

        timer.schedule(task, 1000, 1000); // 1s后执行task,经过1s再次执行  

        boolean sg;
        getActionBar().setTitle(g_TitleName); //
        getActionBar().setDisplayHomeAsUpEnabled(true);
        Intent gattServiceIntent = new Intent(this, BluetoothLeService.class);
        sg = bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);
        //getActionBar().setTitle( "="+BluetoothLeService );
        //mDataField.setText("="+sg );
        updateConnectionState(R.string.connecting);//更新连接状态
    }

    Handler handler = new Handler() {  
        public void handleMessage(Message msg) {  
            if (msg.what == 1) {  
                //tvShow.setText(Integer.toString(i++));  
                //scanLeDevice(true);
                if (mBluetoothLeService != null) {
                    if( mConnected==false )
                    {
                        updateConnectionState(R.string.connecting);
                        final boolean result = mBluetoothLeService.connect(mDeviceAddress);
                        Log.d(TAG, "Connect request result=" + result);
                    }
                }
            }  
            super.handleMessage(msg);  
        };  
    };  
    TimerTask task = new TimerTask() {  

        @Override  
        public void run() {  
            // 需要做的事:发送消息  
            Message message = new Message();  
            message.what = 1;  
            handler.sendMessage(message);  
        }  
    }; 




    Button.OnClickListener listener = new Button.OnClickListener(){//创建监听对象    
        public void onClick(View v){    
            //String strTmp="点击Button02";    
            //Ev1.setText(strTmp);   
            switch( v.getId())
            {
                    case R.id.tx_SetHbutton ://uuid1002 数传通道发送数据 设置上限按钮
                        if( connect_status_bit )
                      {
                            String tx_string=txd_txt.getText().toString().trim(); //去掉有空格
                            mBluetoothLeService.txxx(g_SetHADDR+tx_string+g_EndByte);


                      }else{
                          //Toast.makeText(this, "Deleted Successfully!", Toast.LENGTH_LONG).show(); 
                          Toast toast = Toast.makeText(DeviceControlActivity.this, "设备没有连接！", Toast.LENGTH_SHORT); 
                          toast.show(); 
                      }
                     break;

                    case R.id.tx_SetLbutton ://uuid1002 数传通道发送数据  设置下限按钮
                        if( connect_status_bit )
                      {
                            String tx_string=txd_txtLowTempture.getText().toString().trim(); //去掉有空格
                            mBluetoothLeService.txxx(g_SetLADDR+tx_string+g_EndByte);


                      }else{
                          //Toast.makeText(this, "Deleted Successfully!", Toast.LENGTH_LONG).show(); 
                          Toast toast = Toast.makeText(DeviceControlActivity.this, "设备没有连接！", Toast.LENGTH_SHORT); 
                          toast.show(); 
                      }
                     break;          
                     case R.id.tx_SetFbutton ://uuid1002 数传通道发送数据 设置上限按钮
                            if( connect_status_bit )
                                  {
                                        String tx_string=txd_txtfeedtime.getText().toString().trim(); //去掉有空格
                                        mBluetoothLeService.txxx(g_SetHADDR+tx_string+g_EndByte);


                                  }else{
                                      //Toast.makeText(this, "Deleted Successfully!", Toast.LENGTH_LONG).show(); 
                                      Toast toast = Toast.makeText(DeviceControlActivity.this, "设备没有连接！", Toast.LENGTH_SHORT); 
                                      toast.show(); 
                                  }
                                 break;
//          case R.id.clear_button:
//          {
////                len_g =0;
////                da = "";
////                rx_data_id_1.setText( da );
////                mDataField.setText( ""+len_g );
//          }break;

                default :
                    break;
            }
        }    

    };  
    @Override
    protected void onResume() {
        super.onResume();
        registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter());
        if (mBluetoothLeService != null) {

            final boolean result = mBluetoothLeService.connect(mDeviceAddress);
            Log.d(TAG, "Connect request result=" + result);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        unregisterReceiver(mGattUpdateReceiver);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unbindService(mServiceConnection);
        mBluetoothLeService = null;
        timer.cancel();
        timer=null;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.gatt_services, menu);
        if (mConnected) {
            menu.findItem(R.id.menu_connect).setVisible(false);
            menu.findItem(R.id.menu_disconnect).setVisible(true);
        } else {
            menu.findItem(R.id.menu_connect).setVisible(true);
            menu.findItem(R.id.menu_disconnect).setVisible(false);
        }
        return true;
    } 

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()) {
            case R.id.menu_connect:
                mBluetoothLeService.connect(mDeviceAddress);
                return true;
            case R.id.menu_disconnect:
                mBluetoothLeService.disconnect();
                return true;
            case android.R.id.home:
                onBackPressed();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void updateConnectionState(final int resourceId) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                mConnectionState.setText(resourceId);
            }
        });
    }
String da="";
int len_g = 0;
    private void displayData( String data1 ) {
        //String head1,data_0;
        /*
        head1=data1.substring(0,2);
        data_0=data1.substring(2);
        */
        //da = da+data1+"\n";
        if( data1!=null&&data1.length()>0)
        {
            //mDataField.setText( data1 );
            //len_g += data1.length()/2;
            //da = data1+da;

            //rx_data_id_1.setText( data1 );
//          mDataField.setText( ""+len_g );
            mDataTemptured.setText(data1.substring(4, 6)+"℃");
            mSetTemptured.setText(data1.substring(6, 8)+"℃");
            mSetLTemptured.setText(data1.substring(8, 10)+"℃");
            mFenSuRang.setText(data1.substring(10, 12)+"档");

            //rx_data_id_1.setGravity(Gravity.BOTTOM);
            //rx_data_id_1.setSelection(rx_data_id_1.getText().length());



        }

    }

    // Demonstrates how to iterate through the supported GATT Services/Characteristics.
    // In this sample, we populate the data structure that is bound to the ExpandableListView
    // on the UI.
    private void displayGattServices(List<BluetoothGattService> gattServices) {
        if (gattServices == null) return;


        if( gattServices.size()>0&&mBluetoothLeService.get_connected_status( gattServices )>=4 )
        {
            if( connect_status_bit )
              {
                mConnected = true;
                show_view( true );
                mBluetoothLeService.enable_JDY_ble(true);
                 try {  
                        Thread.currentThread();  
                        Thread.sleep(100);  
                    } catch (InterruptedException e) {  
                        e.printStackTrace();  
                    }  
                 mBluetoothLeService.enable_JDY_ble(true);
                 updateConnectionState(R.string.connected);
              }else{
                  //Toast.makeText(this, "Deleted Successfully!", Toast.LENGTH_LONG).show(); 
                  Toast toast = Toast.makeText(DeviceControlActivity.this, "设备没有连接！", Toast.LENGTH_SHORT); 
                  toast.show(); 
              }
        }


//        SimpleExpandableListAdapter gattServiceAdapter = new SimpleExpandableListAdapter(
//                this,
//                gattServiceData,
//                android.R.layout.simple_expandable_list_item_2,
//                new String[] {LIST_NAME, LIST_UUID},
//                new int[] { android.R.id.text1, android.R.id.text2 },
//                gattCharacteristicData,
//                android.R.layout.simple_expandable_list_item_2,
//                new String[] {LIST_NAME, LIST_UUID},
//                new int[] { android.R.id.text1, android.R.id.text2 }
//        );
//        
//        mGattServicesList.setAdapter(gattServiceAdapter);

    }

    private static IntentFilter makeGattUpdateIntentFilter() {
        final IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED);
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED);
        intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED);
        intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE);
        return intentFilter;
    }
}

Answer 1

    txd_txt=(EditText)findViewById(R.id.tx_text);//1002 data
    txd_txt.setText("28");

    txd_txtLowTempture=(EditText)findViewById(R.id.tx_dispLTemptuer);//1002 data
    txd_txtLowTempture.setText("15");


            刚在一位前辈的帮忙下，解决了。这里应该要初始化控件。加上：
              txd_txtfeedtime=(EditText)findViewById(R.id.tx_feedtimer);//1002 data
    txd_txtfeedtime.setText("15");