关于蓝牙的操作(开启+关闭+搜索+可被发现蓝牙)

activity_main.xml

<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.wzq.bluetooth.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>

MainActivity.java

package com.wzq.bluetooth;

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);

    }

}