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android 6.0 扫描蓝牙设备需要权限
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
再在代码中请求
if (Build.VERSION.SDK_INT>=23)
{
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 10); }
}
}