android 传统蓝牙开发（一）：打开/关闭蓝牙设备

1.声明权限

 

 

2.获取本地蓝牙适配器

BluetoothAdapter bluetoothAdapter=BluetoothAdapter.getDefaultAdapter();

 

 

3.打开本地蓝牙

打开蓝牙有2中打开方式

1.第一种（强行打开）

bluetoothAdapter.enable();

2.第二种（调用系统Api打开）

private static final int EXQUEAT_OPEN = 1;

 

Intent open = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

startActivityForResult(open, EXQUEAT_OPEN);

 

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (EXQUEAT_OPEN == requestCode) {

if (resultCode == RESULT_CANCELED) {

Toast.makeText(this, "打开蓝牙失败", Toast.LENGTH_SHORT).show();

} else {

Toast.makeText(this, "打开蓝牙成功", Toast.LENGTH_SHORT).show();

 

}

 

}

 

}

 

 

4.关闭本地蓝牙

 

bluetoothAdapter.disable();

 

 

 

//开启被其它蓝牙设备发现的功能

if (bluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {

Intent i = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);

//设置为一直开启

i.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 0);

startActivity(i);

}

 

//获取名字 mac地址

String name = bluetoothAdapter.getName();

String mac = bluetoothAdapter.getAddress();

//获取当前蓝牙的状态、

int state = bluetoothAdapter.getState();

switch (state) {

case BluetoothAdapter.STATE_ON:

Toast.makeText(this, "蓝牙已经打开", Toast.LENGTH_SHORT).show();

break;

case BluetoothAdapter.STATE_TURNING_ON:

Toast.makeText(this, "蓝牙正在打开。。", Toast.LENGTH_SHORT).show();

break;

case BluetoothAdapter.STATE_TURNING_OFF:

Toast.makeText(this, "蓝牙正在关闭。。", Toast.LENGTH_SHORT).show();

break;

case BluetoothAdapter.STATE_OFF:

Toast.makeText(this, "蓝牙已经关闭", Toast.LENGTH_SHORT).show();

break;

}

 

（二）搜索蓝牙设备并展示：https://blog.csdn.net/lumingzhang/article/details/89922235

（三）蓝牙设备连接及通信：https://blog.csdn.net/lumingzhang/article/details/89922252