Bluetooth 蓝牙 操作

//布局
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.a1511j.day02_.MainActivity">    <Button        android:id="@+id/btn_start"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="开启蓝牙"        tools:layout_editor_absoluteX="6dp"        tools:layout_editor_absoluteY="3dp"        android:layout_alignParentTop="true"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_marginLeft="120dp"        android:layout_marginStart="120dp"        android:layout_marginTop="40dp" />    <Button        android:id="@+id/btn_stop"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="关闭蓝牙"        tools:layout_editor_absoluteX="-3dp"        tools:layout_editor_absoluteY="77dp"        android:layout_below="@+id/btn_start"        android:layout_alignLeft="@+id/btn_start"        android:layout_alignStart="@+id/btn_start"        android:layout_marginTop="58dp" />    <Button        android:id="@+id/btn_discoverable"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="可被发现蓝牙"        tools:layout_editor_absoluteX="-3dp"        tools:layout_editor_absoluteY="155dp"        android:layout_below="@+id/btn_stop"        android:layout_alignLeft="@+id/btn_stop"        android:layout_alignStart="@+id/btn_stop"        android:layout_marginTop="51dp" />    <Button        android:id="@+id/btn_search"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="搜索蓝牙"        tools:layout_editor_absoluteX="6dp"        tools:layout_editor_absoluteY="250dp"        android:layout_marginLeft="17dp"        android:layout_marginStart="17dp"        android:layout_alignParentBottom="true"        android:layout_alignLeft="@+id/btn_stop"        android:layout_alignStart="@+id/btn_stop"        android:layout_marginBottom="106dp" /></RelativeLayout>
mian
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.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.Toast;import butterknife.BindView;import butterknife.ButterKnife;import butterknife.OnClick;public class MainActivity extends AppCompatActivity {    //代替findviewByid;    @BindView(R.id.btn_start)    Button btnStart;    @BindView(R.id.btn_stop)    Button btnStop;    @BindView(R.id.btn_discoverable)    Button btnSearch;    @BindView(R.id.btn_search)    Button button4;    private BluetoothAdapter bluetoothAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ButterKnife.bind(this);        //获取蓝牙适配器        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();    }    @OnClick({R.id.btn_start, R.id.btn_stop, R.id.btn_search, R.id.btn_discoverable})    public void onViewClicked(View view) {        switch (view.getId()) {            case R.id.btn_start:                bluetoothAdapter.enable();                Toast.makeText(MainActivity.this,"蓝牙已打开",Toast.LENGTH_SHORT).show();                break;            case R.id.btn_stop:                bluetoothAdapter.disable();                Toast.makeText(MainActivity.this,"蓝牙已关闭",Toast.LENGTH_SHORT).show();                break;            case R.id.btn_discoverable:                discoverableBluetooth();                break;            case R.id.btn_search:                searchBluetooh();                break;        }    }    /**     * 打开蓝牙的可检测性     */    private void discoverableBluetooth() {        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);        startActivityForResult(intent,0);        Toast.makeText(MainActivity.this,"蓝牙可检测性已打开",Toast.LENGTH_SHORT).show();    }    //搜索蓝牙    private void searchBluetooh() {        //添加蓝牙可以被发现        IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);        MBluetoothBroadCast mBluetoothBroadCast = new MBluetoothBroadCast();        registerReceiver(mBluetoothBroadCast,intentFilter);        IntentFilter intentFilter1 = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);        registerReceiver(mBluetoothBroadCast,intentFilter1);        //开始找蓝牙设备        bluetoothAdapter.startDiscovery();    }    //符合我注册的过滤器 ,就可以进入onReceive方法    class MBluetoothBroadCast extends BroadcastReceiver {        //一旦被发现或链接,我们就能能收到广播;        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            //如果我们搜索到了其他的蓝牙,就会进入这个判断            if( BluetoothDevice.ACTION_FOUND.equals(action)){                //得到搜索到的蓝牙设备                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                if(device.getBondState()!=BluetoothDevice.BOND_BONDED){                    //用设备获取蓝牙名字                    System.out.println(device.getName()+",,,,,,,,,,,,,,,,");                }                //如果搜索完毕,会进入这个判断;            }else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){                Toast.makeText(MainActivity.this, "已搜数完成", Toast.LENGTH_LONG).show();            }        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);    }}
//开启蓝牙的依赖
compile 'com.jakewharton:butterknife:8.8.1'annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

//开启蓝牙的权限
<uses-permission android:name="android.permission.BLUETOOTH" /><uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />