USB-OTG 接收设备返回信息

项目介绍

记录一下学习过程，以前没接触过USB-OTG相关的开发，半学半模仿的做个小DEMO，可以接收到设备的信息。

引用了GitHub上UsbSerialDriver库
地址为：https://github.com/mdjarv/UsbSerialDriver

DeviceListActivity用于刷新定时刷新列表，获取最新的设备。
DeviceInfoActivity用于显示设备的信息，以及接收到的数据。

详细代码

activity_device_list.xml

<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context="com.jove.demo.activity.DeviceListActivity">  <TextView    android:id="@+id/tv_refresh"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:padding="8dp"    android:gravity="center"    android:text="@string/refreshing"    android:textSize="18sp"    tools:layout_editor_absoluteX="8dp"    tools:layout_editor_absoluteY="0dp"/>  <ProgressBar    android:id="@+id/progressBar"    style="@android:style/Widget.Holo.ProgressBar.Horizontal"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:padding="8dp"    android:indeterminate="true"    tools:layout_editor_absoluteX="8dp"    tools:layout_editor_absoluteY="0dp"/>  <View    android:id="@+id/separator"    android:layout_width="match_parent"    android:layout_height="1dip"    android:background="#eeeeee"/>  <android.support.v7.widget.RecyclerView    android:id="@+id/deviceList"    android:layout_width="match_parent"    android:layout_height="wrap_content"    /></LinearLayout>

activity_device_info.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context="com.jove.demo.activity.DeviceInfoActivity">  <TextView    android:id="@+id/tv_text"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:padding="10dp"    android:gravity="center"    android:text="已连接设备，请双击设备上的IDLE按钮"/>  <TextView    android:id="@+id/tv_info"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center"    /></LinearLayout>

DeviceListActivity

public class DeviceListActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_device_list);    initOTG();    initView();  }  /**   * 初始化UsbSerialDriver   */  private void initOTG() {    driver = new UsbSerialDriver(this, null);  }  /**   * 初始化View   */  private void initView() {    mProgressBarTitle = (TextView) findViewById(R.id.tv_refresh);    mProgressBar = (ProgressBar) findViewById(R.id.progressBar);    lvDevice = (RecyclerView) findViewById(R.id.deviceList);    lvDevice.setLayoutManager(new LinearLayoutManager(DeviceListActivity.this));    lvDevice.addItemDecoration(        new DividerItemDecoration(DeviceListActivity.this, DividerItemDecoration.VERTICAL_LIST));    lvDevice.setItemAnimator(new SlideInOutRightItemAnimator(lvDevice));    lvDevice.setAdapter(new CommonAdapter<UsbDevice>(DeviceListActivity.this,        R.layout.device_item, driver.getUsbDevices()) {      @Override      public void convert(ViewHolder holder, UsbDevice usbDevice) {        holder.setText(R.id.tv_device, usbDevice.getDeviceName());        holder.setOnClickListener(R.id.lin_device, new OnClickListener() {          @Override          public void onClick(View view) {            Intent intent = new Intent(DeviceListActivity.this, DeviceInfoActivity.class);            startActivity(intent);          }        });      }    });  }  /**   * 刷新Device列表   */  private void refreshDeviceList() {    showProgressBar();    new AsyncTask<Void, Void, List<UsbDevice>>() {      @Override      protected List<UsbDevice> doInBackground(Void... params) {        SystemClock.sleep(1000);        final List<UsbDevice> result = driver.getUsbDevices();        return result;      }      @Override      protected void onPostExecute(List<UsbDevice> result) {        lvDevice.getAdapter().notifyDataSetChanged();        mProgressBarTitle.setText(            String.format("%s device(s) found", driver.getUsbDevices().size()));        hideProgressBar();      }    }.execute((Void) null);  }

DeviceInfoActivity

public class DeviceInfoActivity extends Activity {  private TextView tvDevice;  private TextView tvInfo;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_device_info);    initView();    initData();  }  private void initData() {    UsbSerialDriver driver = new UsbSerialDriver(this, new IUsbConnectionHandler() {      @Override      public void onUsbDeviceConnected() {      }      @Override      public void onUsbDeviceDisconnected() {      }      @Override      public void onUsbDeviceMessage(final byte[] message, int responseSize) {        DeviceInfoActivity.this.runOnUiThread(new Runnable() {          @Override          public void run() {            tvInfo.setText("接收的数据为：\n" + ByteHelper.BytesToHexString(message).substring(0, 36));          }        });      }    });    driver.connect(driver.getUsbDevices().get(0));  }  private void initView() {    tvDevice = (TextView) findViewById(R.id.tv_text);    tvInfo = (TextView) findViewById(R.id.tv_info);  }}

主要功能都是有UsbSerialDriver库来实现的，回头仔细看一遍源码！

源码地址：http://download.csdn.net/detail/nhh0905/9844211