实例介绍
【实例简介】
这是一个蓝牙连接通信的demo
【实例截图】
【核心代码】
package com.example.bluetoothconn;
import java.util.ArrayList;
import java.util.Set;
import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
static enum ServerOrCilent {
NONE, SERVICE, CLIENT
};
static String BlueToothAddress = "null";
static ServerOrCilent serviceOrCilent = ServerOrCilent.NONE;
static boolean isOpen = false;
private ListView mListView;
private ArrayList<MyListItem> list;
private Button seachButton, serviceButton, open, close;
ListAdapter mAdapter;
Context mContext;
// 取得默认的蓝牙适配器
private BluetoothAdapter mBtAdapter = BluetoothAdapter.getDefaultAdapter();
boolean isBTOpen;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().setTitle("扫描到的设备");
setContentView(R.layout.activity_main);
mContext = this;
init();
}
private void init() {
list = new ArrayList<MyListItem>();
mAdapter = new ListAdapter(this, list);
mListView = (ListView) findViewById(android.R.id.list);
mListView.setAdapter(mAdapter);
mListView.setFastScrollEnabled(true);
mListView.setOnItemClickListener(mDeviceClickListener);
// Register for broadcasts when a device is discovered
IntentFilter discoveryFilter = new IntentFilter(
BluetoothDevice.ACTION_FOUND);
this.registerReceiver(mReceiver, discoveryFilter);
// Get a set of currently paired devices
Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();
// If there are paired devices, add each one to the ArrayAdapter
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
list.add(new MyListItem(device.getName() "\n"
device.getAddress(), true));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
} else {
list.add(new MyListItem("没有设备已经配对", true));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
open = (Button) findViewById(R.id.open);
open.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isBTOpen = mBtAdapter.isEnabled();
if (!isBTOpen) {
boolean open = mBtAdapter.enable();
if (open) {
Toast.makeText(MainActivity.this, "蓝牙已打开", 1000).show();
} else {
Toast.makeText(MainActivity.this, "打开蓝牙失败", 1000)
.show();
}
} else {
Toast.makeText(MainActivity.this, "蓝牙已经处于开启状态，不需要再打开了",
1000).show();
}
}
});
close = (Button) findViewById(R.id.close);
close.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isBTOpen = mBtAdapter.isEnabled();
if (isBTOpen) {
boolean close = mBtAdapter.disable();
if (close) {
Toast.makeText(MainActivity.this, "蓝牙已关闭", 1000).show();
} else {
Toast.makeText(MainActivity.this, "关闭蓝牙失败", 1000)
.show();
}
} else {
Toast.makeText(MainActivity.this, "蓝牙已经处于关闭状态，不需要再关闭了",
1000).show();
}
}
});
serviceButton = (Button) findViewById(R.id.startService);
serviceButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
isBTOpen = mBtAdapter.isEnabled();
if (isBTOpen) {
serviceOrCilent = ServerOrCilent.SERVICE;
Intent intent = new Intent();
intent.setClass(MainActivity.this, ChatActivity.class);
startActivity(intent);
} else {
Toast.makeText(MainActivity.this,
"蓝牙未开启，无法开启服务，请先开启蓝牙再开启服务。", 1000).show();
}
}
});
seachButton = (Button) findViewById(R.id.startSearch);
seachButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isBTOpen = mBtAdapter.isEnabled();
if (isBTOpen) {
if (mBtAdapter.isDiscovering()) {
mBtAdapter.cancelDiscovery();
seachButton.setText("重新搜索");
} else {
list.clear();
mAdapter.notifyDataSetChanged();
Set<BluetoothDevice> pairedDevices = mBtAdapter
.getBondedDevices();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
list.add(new MyListItem(device.getName() "\n"
device.getAddress(), true));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
} else {
list.add(new MyListItem(
"No devices have been paired", true));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
// 开始搜索
mBtAdapter.startDiscovery();
seachButton.setText("停止搜索");
}
} else {
Toast.makeText(MainActivity.this, "蓝牙处于关闭状态，请开启蓝牙再进行搜索",
1000).show();
}
}
});
}
private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
MyListItem item = list.get(arg2);
String info = item.message;
String address = info.substring(info.length() - 17);
BlueToothAddress = address;
AlertDialog.Builder StopDialog = new AlertDialog.Builder(mContext);
StopDialog.setTitle("连接");// 标题
StopDialog.setMessage(item.message);
StopDialog.setPositiveButton("连接",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
isBTOpen = mBtAdapter.isEnabled();
if (isBTOpen) {
mBtAdapter.cancelDiscovery();
seachButton.setText("重新搜索");
serviceOrCilent = ServerOrCilent.CLIENT;
Intent intent = new Intent();
intent.setClass(MainActivity.this,
ChatActivity.class);
startActivity(intent);
} else {
Toast.makeText(MainActivity.this,
"蓝牙未打开，无法连接至服务端，请先打开蓝牙再进行连接", 1000)
.show();
}
}
});
StopDialog.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
BlueToothAddress = null;
}
});
StopDialog.show();
}
};
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// If it's already paired, skip it, because it's been listed
// already
if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
list.add(new MyListItem(device.getName() "\n"
device.getAddress(), false));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
// When discovery is finished, change the Activity title
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED
.equals(action)) {
setProgressBarIndeterminateVisibility(false);
if (mListView.getCount() == 0) {
list.add(new MyListItem("没有发现蓝牙设备", false));
mAdapter.notifyDataSetChanged();
mListView.setSelection(list.size() - 1);
}
seachButton.setText("重新搜索");
}
}
};
@Override
protected void onDestroy() {
super.onDestroy();
// Make sure we're not doing discovery anymore
if (mBtAdapter != null) {
mBtAdapter.cancelDiscovery();
}
// Unregister broadcast listeners
}
}
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