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 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(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 /

加入 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 pairedDevices = mBluetoothAdapter.getBondedDevices();  

                mArrayAdapter.clear();  

                // If there are paired devices   

                if (pairedDevices.size() > 0)   

                { 

加入//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: