我照着视频内容做的蓝牙连接模块，可是连接的时候显示蓝牙mac地址错误，换了几个不同的蓝牙设备都是这样。请教一下为什么会这样，怎么解决。连接的参数错误，要传当前的选中项目，而非全部设备的列表：

Error 503: The specified address is not a valid Bluetooth MAC address. 原因是地址格式不对，蓝牙列表可能显示不对。大概率是经典蓝牙和 ble 低功耗蓝牙的设备列表处理的方式不对。 本例中就是经典蓝牙，但是用的 ble 的方式显示导致...

授权页面右下角有 mac 地址信息，点击复制图标即可复制到剪贴板，必要时提供给客服进行授权

... Is it possible for the Android platform itself to do this? I had similar code to the above, but with no other code at all that would unregister the service, and I get the same exception. – electrichead Dec 29...

In Android, an ImageView is a rectangle by default. How can I make it a rounded rectangle (clip off all 4 corners of my Bitmap to be rounded rectangles) in the ImageView? ...

...by processing specially-formatted messages in order to show them in a nice Android-specific UI. As of Android 1.6, incoming SMS message broadcasts (android.provider.Telephony.SMS_RECEIVED) are delivered as an "ordered broadcast" — meaning that you can tell the system which components should recei...

I installed mySQL for my Mac. Beside starting the SQL server with mySQL.prefPane tool installed in System Preference, I want to know the instruction to start from command-line. I do as follow: ...

..., decide whether your application should support backup and explicitly set android:allowBackup=(true|false) Click here for More information share | improve this answer | fo...

..." parent="@style/Theme.AppCompat.Light.NoActionBar"> <item name="android:windowNoTitle">true</item> <item name="android:windowActionBar">false</item> <item name="android:windowFullscreen">true</item> <item name="android:windowContentOverlay"&...

...etLocate(locale) EDIT 7th APRIL 2020 You might be experiencing issues in Android 6 and 7, and this happens due to an issue in the androidx libraries while handling the night mode. For this you will also need to override applyOverrideConfiguration in your base activity and update the configuration'...