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POUsing Android USB Host API to read my USB game controller/Or other USB device data
 

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  1. POUsing Android USB Host API to read my USB game controller/Or other USB device data
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    <p>I am trying to use Android USB Host API to read my USB game controller data, once I get this to work, I will connect other device to test. My game controller is connected to my Android phone using OTG cable. I am now able to get device, endpoints information, but I don't know how to read the raw data and display it. </p> <p>Can someone please help me? Some example codes will be appreciated.</p> <pre><code>TextView countDisplay; ArrayList&lt;String&gt; listItems = new ArrayList&lt;String&gt;(); ArrayAdapter&lt;String&gt; adapter; String values = ""; UsbManager mManager; UsbDevice device = null; private byte[] bytes; private static int TIMEOUT = 0; private boolean forceClaim = true; static PendingIntent mPermissionIntent; UsbDeviceConnection connection = null; UsbEndpoint InputEndpoint = null; UsbEndpoint OutputEndpoint = null; private Handler mHandler = new Handler(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mManager = (UsbManager) getSystemService(Context.USB_SERVICE); mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent( "com.android.example.USB_PERMISSION"), 0); IntentFilter filter = new IntentFilter(); filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED); filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED); registerReceiver(mUsbReceiver, filter); HashMap&lt;String, UsbDevice&gt; deviceList = mManager.getDeviceList(); values = values + "deviceListSize:" + deviceList.size() + ",tostring:" + deviceList.toString(); Iterator&lt;UsbDevice&gt; deviceIterator = deviceList.values().iterator(); while (deviceIterator.hasNext()) { device = deviceIterator.next(); values = values + ",device id:" + device.getDeviceId() + ",device name:" + device.getDeviceName(); values = values + ",Protocol:" + device.getDeviceProtocol() + ",ProductId:" + device.getProductId(); values = values + ",DeviceClass:" + device.getDeviceClass() + ",VendorId:" + device.getVendorId(); } if (device != null) { values = values + ",getInterfaceCount:" + device.getInterfaceCount(); UsbInterface intf = device.getInterface(0); values = values + ",intf.getEndpointCount():" + intf.getEndpointCount(); UsbEndpoint endpoint1 = intf.getEndpoint(0); UsbEndpoint endpoint2 = intf.getEndpoint(1); mManager.requestPermission(device, mPermissionIntent); if (mManager.hasPermission(device)) { values = values + ",has permission over device!"; connection = mManager.openDevice(device); if (connection == null) { values = values + ",connection null"; } else { values = values + ",getFileDescriptor:" + connection.getFileDescriptor(); if (endpoint1.getDirection() == UsbConstants.USB_DIR_IN) { InputEndpoint = endpoint1; } else { OutputEndpoint = endpoint1; } if (endpoint2.getDirection() == UsbConstants.USB_DIR_IN) { InputEndpoint = endpoint2; } else { OutputEndpoint = endpoint2; } } if (InputEndpoint == null) { countDisplay.setText(values + ",InputEndpoint is null"); } if (OutputEndpoint == null) { countDisplay.setText(values + ",OutputEndPoint is null"); } connection.claimInterface(intf, forceClaim); mHandler.postDelayed(runnable, 1); } else { values = values + ",Do not have permission over device!"; } } setContentView(R.layout.activity_main); LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = inflater.inflate(R.layout.activity_main, null); LinearLayout ll = new LinearLayout(this); ll.setOrientation(LinearLayout.VERTICAL); int counter = 1; countDisplay = new TextView(this); ll.addView(countDisplay); countDisplay.setText(values + ",counter here"); final Button button = new Button(this); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (device != null &amp;&amp; mManager.hasPermission(device)) { values = values + ",device id:" + device.getDeviceId() + ",device name:" + device.getDeviceName(); values = values + ",Protocol:" + device.getDeviceProtocol() + ",ProductId:" + device.getProductId(); values = values + ",DeviceClass:" + device.getDeviceClass() + ",VendorId:" + device.getVendorId(); countDisplay.setText(values + ",okok"); } else { if (device != null) mManager.requestPermission(device, mPermissionIntent); } } }); ll.addView(button); setContentView(ll); } </code></pre> <p>And Runnable:</p> <pre><code>private Runnable runnable = new Runnable() { public void run() { if (connection != null) { int count = connection.bulkTransfer(InputEndpoint, bytes, bytes.length, TIMEOUT); countDisplay.setText(values + ",bultTransferNo:" + count); countDisplay.setText(values + "bulkValue:" + bytes); } else { countDisplay.setText(values + ",connection is null"); } } }; </code></pre>
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    1. COHave you read this: http://stackoverflow.com/questions/2908530/external-usb-devices-to-android-phones
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    2. CO@mico have you ever programmed this? There is no code on how to read data from USB devices
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    3. CO@PuspenduBanerjee Have you looked at his questions? Out of the 58 he's asked, the 18 that haven't been accepted either don't have any answers or don't have any acceptable ones.
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