Android监听USB设备并获取挂载路径

最新推荐文章于 2025-03-23 13:56:09 发布

菠萝加点糖

最新推荐文章于 2025-03-23 13:56:09 发布

阅读量1.3k

点赞数 21

文章标签： android USB U盘

本文链接：https://blog.youkuaiyun.com/wolf0706/article/details/143905531

版权

在 Android 开发中，如果你想要监听 USB 设备的连接和断开事件，通常会使用 UsbManager 类来管理和处理 USB 设备的连接。Android 提供了 BroadcastReceiver 来接收系统广播，监听 USB 设备的插拔。

首先，你需要在 AndroidManifest.xml 文件中声明 USB 权限和设备特性。
```
<uses-feature android:name="android.hardware.usb.host" />
```

通过创建一个 BroadcastReceiver 来监听系统发送的与 USB 设备连接相关的广播事件

class UsbReceiver : BroadcastReceiver() {
    private val TAG = "UsbReceiver"
    @RequiresApi(Build.VERSION_CODES.R)
    override fun onReceive(context: Context, intent: Intent) {
        // This method is called when the BroadcastReceiver is receiving an Intent broadcast.
        Log.i(TAG,"onReceive ${intent.action}")
        when(intent.action){
        UsbManager.ACTION_USB_DEVICE_ATTACHED->{
            Toast.makeText(context,"U盘已连接",Toast.LENGTH_SHORT).show()
            val path = UsbUtil.getUDiskPath(context)
        }
        UsbManager.ACTION_USB_DEVICE_DETACHED->{
            Toast.makeText(context,"U盘已断开连接",Toast.LENGTH_SHORT).show()
        }
        Intent.ACTION_MEDIA_MOUNTED->{
            Toast.makeText(context,"U盘已挂载",Toast.LENGTH_SHORT).show()
            val uri: Uri? = intent.data
            if (uri != null) {
                val mountPath: String? = uri.path
                Log.d(TAG, "USB device mounted at: $mountPath")
            }
        }
        Intent.ACTION_MEDIA_EJECT->{
            Toast.makeText(context,"U盘已卸载",Toast.LENGTH_SHORT).show()
        }
    }
}

动态注册 BroadcastReceiver

usbReceiver = UsbReceiver()
var  filter = IntentFilter().apply {
                addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
        addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
        addAction(Intent.ACTION_MEDIA_MOUNTED);
        addAction(Intent.ACTION_MEDIA_EJECT);
        addDataScheme("file");
}
registerReceiver(usbReceiver, filter);

override fun onDestroy() {
    super.onDestroy()
    unregisterReceiver(usbReceiver)
}

获取U盘挂载路径

    @RequiresApi(Build.VERSION_CODES.R)
    fun getUDiskPath(mContext:Context):String{
        val srgMgr = mContext.getSystemService(Context.STORAGE_SERVICE) as StorageManager
        val storagePaths = srgMgr.storageVolumes
        storagePaths.forEach {
            val usbPath = it.directory
            usbPath?.let {it1->
                Log.i(TAG,"usb path ${it1.path} ${it.isRemovable}")
                if (it.isRemovable){
                    return it1.path
                }
            }
        }
        return ""
    }