Android开发教程：蓝牙测试

软件平台:Windows 7 + Eclipse + SDK

设计思路:

配合倒计时定时器实现蓝牙打开,可见,扫描三个功能

源代码:

main.xml:

 

<?xml version="1.0" encoding="utf-8"?>   
<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"   
    android:layout_width="fill_parent"   
    android:layout_height="fill_parent" android:orientation="vertical">   
    <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:text="TextView" android:layout_height="wrap_content"></TextView>   
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout1">   
        <Button android:id="@+id/button1" android:text="OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>   
    </LinearLayout>   
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout2">   
        <Button android:id="@+id/button2" android:text="开启可见 " android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>   
        <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设备不可见 "></TextView>   
    </LinearLayout>   
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout3">   
        <Button android:id="@+id/button3" android:text="扫描:OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>   
        <TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止扫描 "></TextView>   
    </LinearLayout>   
    <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>   
</LinearLayout>  

 test_bluetooth.java:

package com.test_bluetooth;   
   
import java.util.Set;   
   
import Android.app.Activity;   
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.os.CountDownTimer;   
import android.view.View;   
import android.widget.ArrayAdapter;   
import android.widget.Button;   
import android.widget.ListView;   
import android.widget.TextView;   
   
public class test_bluetooth extends Activity implements View.OnClickListener   
{   
    private static final int REQUEST_ENABLE_BT = 2;   
    TextView txt;   
    TextView txt_see;   
    TextView txt_scan;   
    BluetoothAdapter mBluetoothAdapter;   
    ArrayAdapter<String> mArrayAdapter;   
    Button btn_switch;   
    Button btn_see;   
    Button btn_scan;   
    ListView list;   
    CountDownTimer see_timer;   
    CountDownTimer scan_timer;   
       
    /** Called when the activity is first created. */   
    @Override   
    public void onCreate(Bundle savedInstanceState)    
    {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   
           
        txt = (TextView)findViewById(R.id.textView1);   
        txt_see = (TextView)findViewById(R.id.textView2);   
        txt_scan = (TextView)findViewById(R.id.textView3);   
        //绑定XML中的ListView，作为Item的容器      
        list = (ListView) findViewById(R.id.listView1);     
           
        //获取蓝牙适配器    
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();   
        mArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1);   
        if (mBluetoothAdapter == null)    
        {   
            // Device does not support Bluetooth    
            txt.setText("fail");   
            //退出程序    
            test_bluetooth.this.finish();   
        }   
           
        btn_switch = (Button)findViewById(R.id.button1);   
        btn_switch.setOnClickListener(this);   
        btn_see = (Button)findViewById(R.id.button2);   
        btn_see.setOnClickListener(this);   
        btn_see.setEnabled(false);      
        btn_scan = (Button)findViewById(R.id.button3);   
        btn_scan.setOnClickListener(this);   
        btn_scan.setText("扫描:OFF");   
        btn_scan.setEnabled(false);     
           
        //判断蓝牙是否已经被打开    
        if (mBluetoothAdapter.isEnabled())   
        {   
            //打开    
            btn_switch.setText("ON");   
            btn_see.setEnabled(true);     
            btn_scan.setEnabled(true);   
        }   
   
        see_timer = new CountDownTimer(120000,1000)    
        {   
            @Override   
            public void onTick( long millisUntilFinished)    
            {   
                txt_see.setText( "剩余可见时间" + millisUntilFinished / 1000 + "秒");   
            }             
            @Override   
            public void onFinish()    
            {   
                //判断蓝牙是否已经被打开    
                if (mBluetoothAdapter.isEnabled())   
                {   
                    btn_see.setEnabled(true);   
                    txt_see.setText( "设备不可见");   
                }   
            }   
        };   
        scan_timer = new CountDownTimer(12000,1000)    
        {   
            @Override   
            public void onTick( long millisUntilFinished)    
            {   
                txt_scan.setText( "剩余扫描时间" + millisUntilFinished / 1000 + "秒");   
            }             
            @Override   
            public void onFinish()    
            {   
                //判断蓝牙是否已经被打开    
                if (mBluetoothAdapter.isEnabled())   
                {   
                    btn_scan.setEnabled(true);   
                    //关闭扫描    
                    mBluetoothAdapter.cancelDiscovery();   
                    btn_scan.setText("扫描:OFF");   
                    txt_scan.setText( "停止扫描");   
                }   
            }   
        };   
    }   
       
    @Override     
    protected void onDestroy() {     
        super.onDestroy();     
        android.os.Process.killProcess(android.os.Process.myPid());     
    }     
       
    @Override   
    public void onClick(View v)    
    {   
        // TODO Auto-generated method stub    
        switch (v.getId())   
        {   
        case R.id.button1:   
            {   
                String str = btn_switch.getText().toString();   
                if (str == "OFF")   
                {   
                    if (!mBluetoothAdapter.isEnabled())    
                    {   
                        //打开蓝牙    
                        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);   
                        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);   
                        txt.setText("s1");   
                        btn_see.setEnabled(true);     
                        btn_scan.setText("扫描:OFF");   
                        btn_scan.setEnabled(true);   
                    }   
                }   
                else   
                {   
                    //关闭蓝牙    
                    mBluetoothAdapter.disable();   
                    btn_switch.setText("OFF");   
                    mArrayAdapter.clear();   
                    list.setAdapter(mArrayAdapter);   
                    btn_see.setEnabled(false);     
                    btn_scan.setEnabled(false);   
                }   
                   
                break;   
            }   
        case R.id.button2:   
        {   
            //开启可见    
            Intent enableBtIntent_See = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);   
            startActivityForResult(enableBtIntent_See, 3);   
            txt.setText("s1");   
            btn_see.setEnabled(false);    
            see_timer.start();   
               
            break;   
        }   
        case R.id.button3:   
        {   
            String str = btn_scan.getText().toString();   
            if (str == "扫描:OFF")   
            {   
                txt.setText("s5");   
                if (mBluetoothAdapter.isEnabled())    
                {   
                    //开始扫描    
                    mBluetoothAdapter.startDiscovery();   
                    txt.setText("s6");   
                    btn_scan.setText("扫描:ON");   
                       
                    // Create a BroadcastReceiver for ACTION_FOUND    
                    final BroadcastReceiver mReceiver = new BroadcastReceiver()    
                    {   
                        @Override   
                        public void onReceive(Context context, Intent intent)    
                        {   
                            // TODO Auto-generated method stub    
                            String action = intent.getAction();   
                            // When discovery finds a device    
                            mArrayAdapter.clear();   
                            if (BluetoothDevice.ACTION_FOUND.equals(action))    
                            {   
                                // Get the BluetoothDevice object from the Intent    
                                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);   
                                // Add the name and address to an array adapter to show in a ListView    
                                mArrayAdapter.add(device.getName() + ":" + device.getAddress());   
                            }   
                            list.setAdapter(mArrayAdapter);   
                        }   
                    };   
                    // Register the BroadcastReceiver    
                    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);   
                    registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy    
                       
                    scan_timer.start();   
                }   
            }   
            else   
            {   
                //关闭扫描    
                mBluetoothAdapter.cancelDiscovery();   
                btn_scan.setText("扫描:OFF");   
                scan_timer.cancel();   
                txt_scan.setText( "停止扫描");   
            }   
               
            break;   
        }   
        default:   
            break;   
        }   
    }   
       
    public void onActivityResult(int requestCode, int resultCode, Intent data)    
    {     
        switch (requestCode)    
        {     
        case REQUEST_ENABLE_BT:     
            // When the request to enable Bluetooth returns      
            if (resultCode == Activity.RESULT_OK)    
            {     
                // Bluetooth is now enabled, so set up a chat session      
                btn_switch.setText("ON");   
                txt.setText("s4");   
                   
                //获取蓝牙列表    
                Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();   
                mArrayAdapter.clear();   
                // If there are paired devices    
                if (pairedDevices.size() > 0)    
                {   
                    //txt.setText("s3");    
                       
                    // Loop through paired devices    
                    for (BluetoothDevice device : pairedDevices)    
                    {   
                        // Add the name and address to an array adapter to show in a ListView    
                        mArrayAdapter.add(device.getName() + ":" + device.getAddress());   
                    }   
                    list.setAdapter(mArrayAdapter);   
                 }   
            } else    
            {     
                finish();     
            }     
        }     
    }     
}  

 效果图: