Android(安卓)系统USB-OTG-HID外设通讯开发

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我是靠谱客的博主朴素唇膏，最近开发中收集的这篇文章主要介绍Android(安卓)系统USB-OTG-HID外设通讯开发，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

还在百度Google导出搜索如何进行USB接口的HID进行开发吗？网站上很多文章并不完善，这方便的也介绍的不多，我看了很多资料，借助网上的一些代码，整理了以下信息，希望能给大家提供便捷

首先请大家仔细看看Google官方并不详细的SDK文档

Android系统3.1及以上版本才能支持USBHOST，这样我们才能连接HID设备进行通讯

项目新建完成之后，AndroidManifest.xml中加入以下代码

下面就是java代码了，直接贴完整代码吧

/*

* Copyright (C) 2011 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

*      

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package
com.android.missilelauncher;

import
 java.nio.ByteBuffer;

import
 java.util.ArrayList;

import
 java.util.Arrays;

import
 java.util.HashMap;

import
 java.util.Iterator;

import
 android.app.Activity;

import
 android.content.Context;

import
 android.content.Intent;

import
 android.hardware.Sensor;

import
 android.hardware.SensorEvent;

import
 android.hardware.SensorEventListener;

import
 android.hardware.SensorManager;

import
 android.hardware.usb.UsbConstants;

import
 android.hardware.usb.UsbDevice;

import
 android.hardware.usb.UsbDeviceConnection;

import
 android.hardware.usb.UsbEndpoint;

import
 android.hardware.usb.UsbInterface;

import
 android.hardware.usb.UsbManager;

import
 android.hardware.usb.UsbRequest;

import
 android.os.Bundle;

import
 android.util.Log;

import
 android.view.Gravity;

import
 android.view.View;

import
 android.view.View.OnClickListener;

import
 android.widget.ArrayAdapter;

import
 android.widget.Button;

import
 android.widget.ListView;

import
 android.widget.TextView;

import
 android.widget.Toast;

public
 class
MissileLauncherActivity 
extends
Activity {

private
static
final
 String TAG = 
"MissileLauncherActivity"
;

private
Button btsend; 
// 发送按钮

private
UsbManager manager; 
// USB管理器

private
UsbDevice mUsbDevice; 
// 找到的USB设备

private
ListView lsv1; 
// 显示USB信息的

private
UsbInterface mInterface;

private
UsbDeviceConnection mDeviceConnection;

@Override

public
void
onCreate(Bundle savedInstanceState) {

super
.onCreate(savedInstanceState);

setContentView(R.layout.launcher);

btsend = (Button) findViewById(R.id.btsend);

btsend.setOnClickListener(btsendListener);

lsv1 = (ListView) findViewById(R.id.lsv1);

// 获取USB设备

manager = (UsbManager) getSystemService(Context.USB_SERVICE);

if
(manager == 
null
) {

return
;

} 
else
{

Log.i(TAG, 
"usb设备："
+ String.valueOf(manager.toString()));

}

HashMap<string, usbdevice=
""
> deviceList = manager.getDeviceList();

Log.i(TAG, 
"usb设备："
+ String.valueOf(deviceList.size()));

Iterator<usbdevice> deviceIterator = deviceList.values().iterator();

ArrayList<string> USBDeviceList = 
new
ArrayList<string>(); 
// 存放USB设备的数量

while
(deviceIterator.hasNext()) {

UsbDevice device = deviceIterator.next();

USBDeviceList.add(String.valueOf(device.getVendorId()));

USBDeviceList.add(String.valueOf(device.getProductId()));

// 在这里添加处理设备的代码

if
(device.getVendorId() == 
6790
&& device.getProductId() == 
57360
) {

mUsbDevice = device;

Log.i(TAG, 
"找到设备"
);

}

}

// 创建一个ArrayAdapter

lsv1.setAdapter(
new
ArrayAdapter<string>(
this
,

android.R.layout.simple_list_item_1, USBDeviceList));

findIntfAndEpt();

}

// 寻找接口和分配结点

private
void
findIntfAndEpt() {

if
(mUsbDevice == 
null
) {

Log.i(TAG, 
"没有找到设备"
);

return
;

}

for
(
int
 i = 
0
; i < mUsbDevice.getInterfaceCount();) {

// 获取设备接口，一般都是一个接口，你可以打印getInterfaceCount()方法查看接

// 口的个数，在这个接口上有两个端点，OUT 和 IN

UsbInterface intf = mUsbDevice.getInterface(i);

Log.d(TAG, i + 
" "
+ intf);

mInterface = intf;

break
;

}

if
(mInterface != 
null
) {

UsbDeviceConnection connection = 
null
;

// 判断是否有权限

if
(manager.hasPermission(mUsbDevice)) {

// 打开设备，获取 UsbDeviceConnection 对象，连接设备，用于后面的通讯

connection = manager.openDevice(mUsbDevice);

if
(connection == 
null
) {

return
;

}

if
(connection.claimInterface(mInterface, 
true
)) {

Log.i(TAG, 
"找到接口"
);

mDeviceConnection = connection;

// 用UsbDeviceConnection 与 UsbInterface 进行端点设置和通讯

getEndpoint(mDeviceConnection, mInterface);

} 
else
{

connection.close();

}

} 
else
{

Log.i(TAG, 
"没有权限"
);

}

} 
else
{

Log.i(TAG, 
"没有找到接口"
);

}

}

private
UsbEndpoint epOut;

private
UsbEndpoint epIn;

// 用UsbDeviceConnection 与 UsbInterface 进行端点设置和通讯

private
void
getEndpoint(UsbDeviceConnection connection, UsbInterface intf) {

if
(intf.getEndpoint(
1
) != 
null
) {

epOut = intf.getEndpoint(
1
);

}

if
(intf.getEndpoint(
0
) != 
null
) {

epIn = intf.getEndpoint(
0
);

}

}

private
byte
[] Sendbytes; 
// 发送信息字节

private
byte
[] Receiveytes; 
// 接收信息字节

private
OnClickListener btsendListener = 
new
OnClickListener() {

int
ret = -
100
;

@Override

public
void
onClick(View v) {

String testString = 
"010A"
;

//String testString = "C783CC30";

byte
[] bt = clsPublic.HexString2Bytes(testString);

Sendbytes = Arrays.copyOf(bt, bt.length);

// 1,发送准备命令

ret = mDeviceConnection.bulkTransfer(epOut, Sendbytes,

Sendbytes.length, 
5000
);

Log.i(TAG, 
"已经发送!"
);

// 2,接收发送成功信息

Receiveytes = 
new
byte
[
32
];

ret = mDeviceConnection.bulkTransfer(epIn, Receiveytes,

Receiveytes.length, 
10000
);

Log.i(TAG, 
"接收返回值:"
+ String.valueOf(ret));

if
(ret != 
32
) {

DisplayToast(
"接收返回值"
+ String.valueOf(ret));

return
;

} 
else
{

// 查看返回值

DisplayToast(clsPublic.Bytes2HexString(Receiveytes));

Log.i(TAG, clsPublic.Bytes2HexString(Receiveytes));

}

}

};

public
void
DisplayToast(CharSequence str) {

Toast toast = Toast.makeText(
this
, str, Toast.LENGTH_LONG);

// 设置Toast显示的位置

toast.setGravity(Gravity.TOP, 
0
, 
200
);

// 显示Toast

toast.show();

}

}