旺仔：Android的蓝牙技术（一）（Genymotion模拟器测试没有实现）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.hanqi.bluetooth.MainActivity"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="搜索蓝牙设备"
android:onClick="bt_OnClick"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tvDevices"
/>
</LinearLayout>

 

package com.hanqi.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.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
TextView tvDevices;
BluetoothAdapter mBluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvDevices=(TextView)findViewById(R.id.tvDevices);
//获取本地蓝牙适配器
mBluetoothAdapter=BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> paireDevices=mBluetoothAdapter.getBondedDevices();
if (paireDevices.size()>0)
{
for (BluetoothDevice device:paireDevices)
{
tvDevices.append(device.getName()+":"+device.getAddress());
}
}
IntentFilter filter=new IntentFilter(BluetoothDevice.ACTION_FOUND);
this.registerReceiver(receiver,filter);
filter=new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
this.registerReceiver(receiver,filter);
}
public void bt_OnClick(View v)
{
setProgressBarIndeterminateVisibility(true);
setTitle("正在扫描...");
if (mBluetoothAdapter.isDiscovering())
{
mBluetoothAdapter.cancelDiscovery();
}
mBluetoothAdapter.startDiscovery();
}
private final BroadcastReceiver receiver=new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action=intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action))
{
BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState()!=BluetoothDevice.BOND_BONDED)
{
tvDevices.append(device.getName()+":"+device.getAddress());
}
}else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action))
{
setProgressBarVisibility(false);
setTitle("已搜索完成");
}
}
};
}