android通过usb读取U盘的方法

2023-09-09 18:10:04 504

本文实例为大家分享了android通过usb读取U盘的具体代码，供大家参考，具体内容如下

1.关联compile‘com.github.mjdev:libaums:+'

2.权限设置

3.监听u盘插入拔出的广播

//监听otg插入拔出
IntentFilterusbDeviceStateFilter=newIntentFilter();
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
IntentFilterfilter=newIntentFilter(Constant.ACTION_USB_PERMISSION);
mContext.registerReceiver(UDiskMountedReceiver,filter);

4.代码

packagecom.zb.usbtest;

/**
*@项目名：UsbTest
*@包名：com.zb.usbtest
*@文件名:ReadUDisk
*@创建者:25934
*@创建时间:2018-07-2413:50
*@描述：TODO
*/

importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.hardware.usb.UsbManager;
importandroid.util.Log;
importcom.github.mjdev.libaums.UsbMassStorageDevice;
importcom.github.mjdev.libaums.fs.FileSystem;
importcom.github.mjdev.libaums.fs.UsbFile;
importcom.github.mjdev.libaums.partition.Partition;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.Collections;
importjava.util.Comparator;
importjava.util.List;
importstaticcom.zb.usbtest.Constant.ACTION_USB_PERMISSION;

publicclassReadUDisk{
privateUDiskCallBack.OnUDiskCallBackmOnUDiskCallBack=null;
privateContextmContext;
privateUsbMassStorageDevice[]storageDevices;
privateListusbFiles=newArrayList<>();
privatefinalUsbManagermUsbManager;

publicReadUDisk(Contextcontext){
mContext=context;
mUsbManager=(UsbManager)mContext.getSystemService(Context.USB_SERVICE);
}

/**
*接受U盘插入和拔出事件
*@paramonUDiskCallBack
*/
publicvoidsetOnUDiskCallBack(UDiskCallBack.OnUDiskCallBackonUDiskCallBack){
if(mOnUDiskCallBack==null){
registerReceiver();
mOnUDiskCallBack=onUDiskCallBack;
}
}

/**
*注册广播接收者
*/
publicvoidregisterReceiver(){
//监听otg插入拔出
IntentFilterusbDeviceStateFilter=newIntentFilter();
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
IntentFilterfilter=newIntentFilter(Constant.ACTION_USB_PERMISSION);
mContext.registerReceiver(UDiskMountedReceiver,filter);
Log.e("ReadUDisk","registerReceiver:");
}

/**
*注销广播接收者
*/
publicvoidunReisterReceiver(){
if(UDiskMountedReceiver!=null){
mContext.unregisterReceiver(UDiskMountedReceiver);
}
}

/**
*检查usb设备的权限
*@paramdevice
*@return
*/
publicbooleancheckPerssion(UsbMassStorageDevicedevice){
if(mUsbManager==null){
returnfalse;
}
if(mUsbManager.hasPermission(device.getUsbDevice())){//有就直接读取设备是否有权限
returntrue;
}else{
returnfalse;
}
}


/**
*读取当前usb设备的数量
*@return
*/
publicintgetDeviceCount(){
//获取存储设备
UsbMassStorageDevice[]storageDevices=UsbMassStorageDevice.getMassStorageDevices(mContext);
returnstorageDevices.length;
}

/**
*根据position获取usb设备
*@paramposition
*@return
*/
publicUsbMassStorageDevicegetUsbMassDevice(intposition){
//获取存储设备
UsbMassStorageDevice[]storageDevices=UsbMassStorageDevice.getMassStorageDevices(mContext);
if(position>storageDevices.length){
returnnull;
}else{
returnstorageDevices[position];
}
}

/**
*获取usb上所有的存储设备
*@return
*/
publicUsbMassStorageDevice[]getUsbMassAllDevice(){
//获取存储设备
UsbMassStorageDevice[]storageDevices=UsbMassStorageDevice.getMassStorageDevices(mContext);
returnstorageDevices;
}

/**
*根据设备获取路径
*@paramdevice
*@return
*/
publicFileSystemreadDevice(UsbMassStorageDevicedevice){
try{
if(!checkPerssion(device)){//检查是否有权限
returnnull;
}

device.init();//使用设备之前需要进行初始化
Partitionpartition=device.getPartitions().get(0);//仅使用设备的第一个分区
FileSystemcurrentFs=partition.getFileSystem();
//currentFs.getCapacity();//容量大小
//currentFs.getOccupiedSpace();//已使用大小
//currentFs.getFreeSpace();//未使用的大小
UsbFileroot=currentFs.getRootDirectory();//获取根目录
StringdeviceName=currentFs.getVolumeLabel();//获取设备标签
returncurrentFs;
}catch(Exceptione){
e.printStackTrace();
returnnull;
}
}

/**
*获取U盘的文件和文件夹路径
*@paramfileSystem
*@return
*/
publicListgetUsbFiles(FileSystemfileSystem){
usbFiles.clear();
try{
for(UsbFilefile: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,newComparator(){//简单排序文件夹在前文件在后
@Override
publicintcompare(UsbFileoFile1,UsbFileoFile2){
returnoFile1.isDirectory()
?-1
:1;
}
});
}catch(IOExceptione){
e.printStackTrace();
}
returnusbFiles;
}


privateBroadcastReceiverUDiskMountedReceiver=newBroadcastReceiver(){
@Override
publicvoidonReceive(Contextcontext,Intentintent){
Stringaction=intent.getAction();
switch(action){
caseACTION_USB_PERMISSION://自定义权限广播
if(mOnUDiskCallBack!=null){
mOnUDiskCallBack.onPermissionCallBack();
}
break;
caseUsbManager.ACTION_USB_DEVICE_ATTACHED://usb设备插入广播
if(mOnUDiskCallBack!=null){
mOnUDiskCallBack.onAttachDeviceCallBack();
}
break;

caseUsbManager.ACTION_USB_DEVICE_DETACHED://usb设备拔出广播
if(mOnUDiskCallBack!=null){
mOnUDiskCallBack.onDetachDeviceCallBack();
}
break;
}
}
};
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

android通过usb读取U盘的方法

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