JAVA高级面试进阶训练营视频教程

admin

　　1.android6.0版本搜索蓝牙需要开启位置信息

　　需在Manifest中添加权限：

 

　　<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

 

　　2.添加请求开启位置信息代码

 

private void mayRequestLocation() {
        if (Build.VERSION.SDK_INT >= 23) {
            int checkCallPhonePermission = ContextCompat.checkSelfPermission(getApplicationContext(),
                    Manifest.permission.ACCESS_COARSE_LOCATION);
            if(checkCallPhonePermission != PackageManager.PERMISSION_GRANTED){
                //判断是否需要 向用户解释，为什么要申请该权限
                if(ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_COARSE_LOCATION))
                    Toast.makeText(getApplicationContext(),"6.0就是这样坑", Toast.LENGTH_LONG).show();

                ActivityCompat.requestPermissions(this ,new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},REQUEST_FINE_LOCATION);
                return;
            }else{

            }
        } else {

        }
    }

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
 @NonNull int[] grantResults) {
 switch (requestCode) {
 case REQUEST_FINE_LOCATION:
 // If request is cancelled, the result arrays are empty.
 if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

 } else{
 // The user disallowed the requested permission.
 }
 break;

 }

}

 

　　3.亲测在6.0版本下可以搜索到蓝牙。

 

　　4.注：扫描时需关闭WIFI！