USB Serielle Kommunikation zwischen Android und Computer ⇐ Android

[Anonymous]

Ich muss eine App erstellen, die Textdaten von einem Computer empfängt und an eine Android-App überträgt. Ich habe Folgendes gefunden: https://github.com/mik3y/usb-serial-for-android.
Ich habe das Beispiel verwendet, um zu sehen, ob ich so angefangen habe. Ich konnte eine Kommunikation dazwischen sehen. Als ich es in meinem Mobiltelefon verwendete, schien es, dass 1 Gerät gefunden wurde: Anbieter 1519, Produkt 0020, kein Treiber. Es ist, als ob die Kommunikation nicht stattgefunden hätte und der Computer nicht gefunden wurde.

Hier ist der Code:

SerialConsoleActivity.java--

Code: Select all

package com.hoho.android.usbserial.examples;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.ScrollView;
import android.widget.TextView;

import com.hoho.android.usbserial.driver.UsbSerialDriver;
import com.hoho.android.usbserial.util.HexDump;
import com.hoho.android.usbserial.util.SerialInputOutputManager;

import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
* Monitors a single {@link UsbSerialDriver} instance, showing all data
* received.
*
* @author mike wakerly ([email protected])
*/
public class SerialConsoleActivity extends Activity {

private final String TAG = SerialConsoleActivity.class.getSimpleName();

/**
* Driver instance, passed in statically via
* {@link #show(Context, UsbSerialDriver)}.
*
*
* This is a devious hack; it'd be cleaner to re-create the driver using
* arguments passed in with the {@link #startActivity(Intent)} intent.  We
* can get away with it because both activities will run in the same
* process, and this is a simple demo.
*/
private static UsbSerialDriver sDriver = null;

private TextView mTitleTextView;
private TextView mDumpTextView;
private ScrollView mScrollView;

private final ExecutorService mExecutor = Executors.newSingleThreadExecutor();

private SerialInputOutputManager mSerialIoManager;

private final SerialInputOutputManager.Listener mListener =
new SerialInputOutputManager.Listener() {

@Override
public void onRunError(Exception e) {
Log.d(TAG, "Runner stopped.");
}

@Override
public void onNewData(final byte[] data) {
SerialConsoleActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
SerialConsoleActivity.this.updateReceivedData(data);
}
});
}
};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.serial_console);
mTitleTextView = (TextView) findViewById(R.id.demoTitle);
mDumpTextView = (TextView) findViewById(R.id.consoleText);
mScrollView = (ScrollView) findViewById(R.id.demoScroller);
}

@Override
protected void onPause() {
super.onPause();
stopIoManager();
if (sDriver != null) {
try {
sDriver.close();
} catch (IOException e) {
// Ignore.
}
sDriver = null;
}
finish();
}

@Override
protected void onResume() {
super.onResume();
Log.d(TAG, "Resumed, sDriver=" + sDriver);
if (sDriver == null) {
mTitleTextView.setText("No serial device.");
} else {
try {
sDriver.open();
sDriver.setParameters(115200, 8, UsbSerialDriver.STOPBITS_1, UsbSerialDriver.PARITY_NONE);
} catch (IOException e) {
Log.e(TAG, "Error setting up device: " + e.getMessage(), e);
mTitleTextView.setText("Error opening device: " + e.getMessage());
try {
sDriver.close();
} catch (IOException e2) {
// Ignore.
}
sDriver = null;
return;
}
mTitleTextView.setText("Serial device: " + sDriver.getClass().getSimpleName());
}
onDeviceStateChange();
}

private void stopIoManager() {
if (mSerialIoManager != null) {
Log.i(TAG, "Stopping io manager ..");
mSerialIoManager.stop();
mSerialIoManager = null;
}
}

private void startIoManager() {
if (sDriver != null) {
Log.i(TAG, "Starting io manager ..");
mSerialIoManager = new SerialInputOutputManager(sDriver, mListener);
mExecutor.submit(mSerialIoManager);
}
}

private void onDeviceStateChange() {
stopIoManager();
startIoManager();
}

private void updateReceivedData(byte[] data) {
final String message = "Read " + data.length + " bytes:  \n"
+ HexDump.dumpHexString(data) + "\n\n";
mDumpTextView.append(message);
mScrollView.smoothScrollTo(0, mDumpTextView.getBottom());
}

/**
* Starts the activity, using the supplied driver instance.
*
* @param context
* @param driver
*/
static void show(Context context, UsbSerialDriver driver) {
sDriver = driver;
final Intent intent = new Intent(context, SerialConsoleActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_HISTORY);
context.startActivity(intent);
}

}

DeviceListActivity--

Code: Select all

  import android.app.Activity;
import android.content.Context;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.TwoLineListItem;

import com.hoho.android.usbserial.driver.UsbSerialDriver;
import com.hoho.android.usbserial.driver.UsbSerialProber;
import com.hoho.android.usbserial.util.HexDump;

import java.util.ArrayList;
import java.util.List;

/**
* Shows a {@link ListView} of available USB devices.
*
* @author mike wakerly ([email protected])
*/
public class DeviceListActivity extends Activity {

private final String TAG = DeviceListActivity.class.getSimpleName();

private UsbManager mUsbManager;
private ListView mListView;
private TextView mProgressBarTitle;
private ProgressBar mProgressBar;

private static final int MESSAGE_REFRESH = 101;
private static final long REFRESH_TIMEOUT_MILLIS = 5000;

private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_REFRESH:
refreshDeviceList();
mHandler.sendEmptyMessageDelayed(MESSAGE_REFRESH, REFRESH_TIMEOUT_MILLIS);
break;
default:
super.handleMessage(msg);
break;
}
}

};

/** Simple container for a UsbDevice and its driver.  */
private static class DeviceEntry {
public UsbDevice device;
public UsbSerialDriver driver;

DeviceEntry(UsbDevice device, UsbSerialDriver driver) {
this.device = device;
this.driver = driver;
}
}

private List mEntries = new ArrayList();
private ArrayAdapter mAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
mListView = (ListView) findViewById(R.id.deviceList);
mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
mProgressBarTitle = (TextView) findViewById(R.id.progressBarTitle);

mAdapter = new ArrayAdapter(this, android.R.layout.simple_expandable_list_item_2, mEntries) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final TwoLineListItem row;
if (convertView == null){
final LayoutInflater inflater =
(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = (TwoLineListItem) inflater.inflate(android.R.layout.simple_list_item_2, null);
} else {
row = (TwoLineListItem) convertView;
}

final DeviceEntry entry = mEntries.get(position);
final String title = String.format("Vendor %s Product %s",
HexDump.toHexString((short) entry.device.getVendorId()),
HexDump.toHexString((short) entry.device.getProductId()));
row.getText1().setText(title);

final String subtitle = entry.driver != null ?
entry.driver.getClass().getSimpleName() : "No Driver";
row.getText2().setText(subtitle);

return row;
}

};
mListView.setAdapter(mAdapter);

mListView.setOnItemClickListener(new ListView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
Log.d(TAG, "Pressed item " + position);
if (position >= mEntries.size()) {
Log.w(TAG, "Illegal position.");
return;
}

final DeviceEntry entry = mEntries.get(position);
final UsbSerialDriver driver = entry.driver;
if (driver == null) {
Log.d(TAG, "No driver.");
return;
}

showConsoleActivity(driver);
}
});
}

@Override
protected void onResume() {
super.onResume();
mHandler.sendEmptyMessage(MESSAGE_REFRESH);
}

@Override
protected void onPause() {
super.onPause();
mHandler.removeMessages(MESSAGE_REFRESH);
}

private void refreshDeviceList() {
showProgressBar();

new AsyncTask() {
@Override
protected List doInBackground(Void...  params) {
Log.d(TAG, "Refreshing device list ...");
SystemClock.sleep(1000);
final List result = new ArrayList();
for (final UsbDevice device : mUsbManager.getDeviceList().values()) {
final List drivers =
UsbSerialProber.probeSingleDevice(mUsbManager, device);
Log.d(TAG, "Found usb device: " + device);
if (drivers.isEmpty()) {
Log.d(TAG, "  - No UsbSerialDriver available.");
result.add(new DeviceEntry(device, null));
} else {
for (UsbSerialDriver driver : drivers) {
Log.d(TAG, "  + " + driver);
result.add(new DeviceEntry(device, driver));
}
}
}
return result;
}

@Override
protected void onPostExecute(List result) {
mEntries.clear();
mEntries.addAll(result);
mAdapter.notifyDataSetChanged();
mProgressBarTitle.setText(
String.format("%s device(s) found",Integer.valueOf(mEntries.size())));
hideProgressBar();
Log.d(TAG, "Done refreshing, " + mEntries.size() + " entries found.");
}

}.execute((Void) null);
}

private void showProgressBar() {
mProgressBar.setVisibility(View.VISIBLE);
mProgressBarTitle.setText(R.string.refreshing);
}

private void hideProgressBar() {
mProgressBar.setVisibility(View.INVISIBLE);
}

private void showConsoleActivity(UsbSerialDriver driver) {
SerialConsoleActivity.show(this, driver);
}

}