android通过usb读取U盘的方法

 //监听otg插入 拔出 IntentFilter usbDeviceStateFilter = new IntentFilter(); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); mContext.registerReceiver(UDiskMountedReceiver, usbDeviceStateFilter); //注册监听自定义广播 IntentFilter filter = new IntentFilter(Constant.ACTION_USB_PERMISSION); mContext.registerReceiver(UDiskMountedReceiver, filter);

 package com.zb.usbtest; /** * @项目名： UsbTest * @包名： com.zb.usbtest * @文件名: ReadUDisk * @创建者: 25934 * @创建时间: 2018-07-24 13:50 * @描述： TODO */ import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.hardware.usb.UsbManager; import android.util.Log; import com.github.mjdev.libaums.UsbMassStorageDevice; import com.github.mjdev.libaums.fs.FileSystem; import com.github.mjdev.libaums.fs.UsbFile; import com.github.mjdev.libaums.partition.Partition; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import static com.zb.usbtest.Constant.ACTION_USB_PERMISSION; public class ReadUDisk { private UDiskCallBack.OnUDiskCallBack mOnUDiskCallBack = null; private Context    mContext; private UsbMassStorageDevice[] storageDevices; private List usbFiles = new ArrayList<>(); private final UsbManager mUsbManager; public ReadUDisk(Context context) { mContext = context; mUsbManager = (UsbManager) mContext.getSystemService(Context.USB_SERVICE); } /** * 接受U盘插入和拔出事件 * @param onUDiskCallBack */ public void setOnUDiskCallBack(UDiskCallBack.OnUDiskCallBack onUDiskCallBack) { if (mOnUDiskCallBack == null) { registerReceiver(); mOnUDiskCallBack = onUDiskCallBack; } } /** * 注册广播接收者 */ public void registerReceiver() { //监听otg插入 拔出 IntentFilter usbDeviceStateFilter = new IntentFilter(); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); usbDeviceStateFilter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); mContext.registerReceiver(UDiskMountedReceiver, usbDeviceStateFilter); //注册监听自定义广播 IntentFilter filter = new IntentFilter(Constant.ACTION_USB_PERMISSION); mContext.registerReceiver(UDiskMountedReceiver, filter); Log.e("ReadUDisk", "registerReceiver: "); } /** * 注销广播接收者 */ public void unReisterReceiver() { if (UDiskMountedReceiver != null) { mContext.unregisterReceiver(UDiskMountedReceiver); } } /** * 检查usb设备的权限 * @param device * @return */ public boolean checkPerssion(UsbMassStorageDevice device) { if (mUsbManager==null){ return false; } if (mUsbManager.hasPermission(device.getUsbDevice())) {//有就直接读取设备是否有权限 return true; } else { return false; } } /** * 读取当前usb设备的数量 * @return */ public int getDeviceCount() { //获取存储设备 UsbMassStorageDevice[] storageDevices =UsbMassStorageDevice.getMassStorageDevices(mContext); return storageDevices.length; } /** * 根据position获取usb设备 * @param position * @return */ public UsbMassStorageDevice getUsbMassDevice(int position) { //获取存储设备 UsbMassStorageDevice[] storageDevices =UsbMassStorageDevice.getMassStorageDevices(mContext); if (position > storageDevices.length) { return null; } else { return storageDevices[position]; } } /** * 获取usb上所有的存储设备 * @return */ public UsbMassStorageDevice[] getUsbMassAllDevice() { //获取存储设备 UsbMassStorageDevice[] storageDevices =UsbMassStorageDevice.getMassStorageDevices(mContext); return storageDevices; } /** * 根据设备获取路径 * @param device * @return */ public FileSystem readDevice(UsbMassStorageDevice device) { try { if (!checkPerssion(device)){ //检查是否有权限 return null; } device.init();//使用设备之前需要进行 初始化 Partition partition = device.getPartitions().get(0); //仅使用设备的第一个分区 FileSystem currentFs = partition.getFileSystem(); // currentFs.getCapacity(); //容量大小 // currentFs.getOccupiedSpace(); //已使用大小 // currentFs.getFreeSpace(); //未使用的大小 UsbFile root  = currentFs.getRootDirectory();//获取根目录 String deviceName = currentFs.getVolumeLabel();//获取设备标签 return currentFs; } catch (Exception e) { e.printStackTrace(); return null; } } /** * 获取U盘的文件和文件夹路径 * @param fileSystem * @return */ public List getUsbFiles(FileSystem fileSystem) { usbFiles.clear(); try { for (UsbFile file : fileSystem.getRootDirectory() .listFiles()) { //将所以文件和文件夹路径添加到usbFiles数组中 usbFiles.add(file); } Collections.sort(usbFiles, new Comparator() {//简单排序 文件夹在前 文件在后 @Override public int compare(UsbFile oFile1, UsbFile oFile2) { return oFile1.isDirectory() ? -1 : 1; } }); } catch (IOException e) { e.printStackTrace(); } return usbFiles; } private BroadcastReceiver UDiskMountedReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); switch (action) { case ACTION_USB_PERMISSION: //自定义权限广播 if (mOnUDiskCallBack != null) { mOnUDiskCallBack.onPermissionCallBack(); } break; case UsbManager.ACTION_USB_DEVICE_ATTACHED: //usb设备插入广播 if (mOnUDiskCallBack != null) { mOnUDiskCallBack.onAttachDeviceCallBack(); } break; case UsbManager.ACTION_USB_DEVICE_DETACHED: //usb设备拔出广播 if (mOnUDiskCallBack != null) { mOnUDiskCallBack.onDetachDeviceCallBack(); } break; } } }; }