【移动应用开发技术】Android 6.0中扫描不到Ble设备怎么办

【移动应用开发技术】Android6.0中扫描不到Ble设备怎么办

动态申请位置权限ACCESS_COARSE_LOCATION<uses-permission

android:name="android.permission.ACCESS_COARSE_LOCATION"/>然后在程序运行过程中进行申请private

static

final

int

REQUEST_CODE_ACCESS_COARSE_LOCATION

=

1;

...

if

(Build.VERSION.SDK_INT

>=

Build.VERSION_CODES.M)

{//如果

API

level

是大于等于

23(Android

6.0)

时

//判断是否具有权限

if

(ContextCompat.checkSelfPermission(this,

Manifest.permission.ACCESS_COARSE_LOCATION)

!=

PackageManager.PERMISSION_GRANTED)

{

//判断是否需要向用户解释为什么需要申请该权限

if

(ActivityCompat.shouldShowRequestPermissionRationale(this,

Manifest.permission.ACCESS_COARSE_LOCATION))

{

showToast("自Android

6.0开始需要打开位置权限才可以搜索到Ble设备");

}

//请求权限

ActivityCompat.requestPermissions(this,

new

String[]{Manifest.permission.ACCESS_COARSE_LOCATION},

REQUEST_CODE_ACCESS_COARSE_LOCATION);

}

}@Override

public

void

onRequestPermissionsResult(int

requestCode,

@NonNull

String[]

permissions,

@NonNull

int[]

grantResults)

{

if

(requestCode

==

REQUEST_CODE_ACCESS_COARSE_LOCATION)

{

if

(grantResults.length

>

0

&&

grantResults[0]

==

PackageManager.PERMISSION_GRANTED)

{

//用户允许改权限，0表示允许，-1表示拒绝

PERMISSION_GRANTED

=

0，

PERMISSION_DENIED

=

-1

//permission

was

granted,

yay!

Do

the

contacts-related

task

you

need

to

do.

//这里进行授权被允许的处理

}

else

{

//permission

denied,

boo!

Disable

the

functionality

that

depends

on

this

permission.

//这里进行权限被拒绝的处理

}

}

else

{

super.onRequestPermissionsResult(requestCode,

permissions,

grantResults);

}

}打开定位(Location)/**

*

Location

service

if

enable

*

*

@param

context

*

@return

location

is

enable

if

return

true,

otherwise

disable.

*/

public

static

final

boolean

isLocationEnable(Context

context)

{

LocationManager

locationManager

=

(LocationManager)

context.getSystemService(Context.LOCATION_SERVICE);

boolean

networkProvider

=

locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

boolean

gpsProvider

=

locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

if

(networkProvider

||

gpsProvider)

return

true;

return

false;

}private

static

final

int

REQUEST_CODE_LOCATION_SETTINGS

=

2;

...

private

void

setLocationService()

{

Intent

locationIntent

=

new

Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);

this.startActivityForResult(locationIntent,

REQUEST_CODE_LOCATION_SETTINGS);

}进入定位设置界面，让用户自己选择是否打开定位。选择的结果获取：@Override

protected

void

onActivityResult(int

requestCode,

int

resultCode,

Intent

data)

{

if

(requestCode

==

REQUEST_CODE_LOCATION_SETTINGS)

{

if

(isLoca