ANDROID_MARS学习笔记_S03_002_设置可见性及扫描蓝牙设备

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
</manifest>

package com.bluetooth2;

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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

private Button discoverButton = null;
private Button scanButton = null;
private BluetoothAdapter adapter = null;
private BluetoothReceiver bluetoothReceiver = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

adapter = BluetoothAdapter.getDefaultAdapter();

discoverButton = (Button) findViewById(R.id.discoverButton);
scanButton = (Button) findViewById(R.id.scanButton);

discoverButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent discoverIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
//设置蓝牙可见性，500表示可见时间（单位：秒），当值大于300时默认为300
discoverIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 500);
System.out.println("设置蓝牙可见性-->");
startActivity(discoverIntent);//android自带的activity
}
});

scanButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//开始扫描周围蓝牙设备，该方法是异步调用并以广播的机制返回，所以需要创建一个BroadcastReceiver来获取信息
System.out.println("开始扫描周围蓝牙设备-->");
adapter.startDiscovery();
}
});

//设定广播接收的filter
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
//创建蓝牙广播信息的receiver
bluetoothReceiver = new BluetoothReceiver();
//注册广播接收器
registerReceiver(bluetoothReceiver, intentFilter);
}

private class BluetoothReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//获得扫描到的远程蓝牙设备
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
System.out.println("BluetoothReceiver收到广播---->" + device);
}
}
}