google官方文档https://developer.android.com/guide/topics/connectivity/usb/host.html
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
然后res下增加xml文件夹,新建device_filter.xml,并加入一下代码,这里是声明HID设备VID以及PID,注意是10进制
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();
}
}
这里还有一个需要解决的问题就是如何设置输入输出报文,函数是controlTransfer(requestType, request, value, index, buffer, length, timeout)
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