Hi ! ,I want to USB HID hardware communicates with android tablet but newbe java and android (good c#.net)
-Question 1-knowledge of how to get the usb device attached to the tablet
UsbDevice usbdeneme = getIntent().getParcelableExtra("usbdeneme"); - - -> I receive Null data
-Question 2-"Parcelable" did not understand, is it true for "parcelable"
-Question 3-Do you have a script file, you need to add manifest
Ex: <uses-feature android:name="android.hardware.usb.host"/><uses-sdk
-Question 4-How do I listen to a continuous data retrieval for USB HID
- main code the following commands
Java Code:
package com.Usb_deneme;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
protected static final int Class = 0;
Button button1;
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
textView1 =(TextView) findViewById(R.id.textView1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try{
UsbDevice usbdeneme = getIntent().getParcelableExtra("usbdeneme");
if (usbdeneme != null){
textView1.setText("Success --> " + usbdeneme.toString());
}
}
catch(Exception ex) {textView1.setText("Error --> "+ex.toString());}
}
});
}
}
- usb device class the following commands
Java Code:
package com.Usb_deneme;
import android.hardware.usb.UsbInterface;
//import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
//import android.util.Log;
//import java.io.FileDescriptor;
/**
* A class representing a USB device.
*/
public class UsbDevice implements Parcelable {
private static final String TAG = "UsbDevice";
private final String mName;
private final int mVendorId;
private final int mProductId;
private final int mClass;
private final int mSubclass;
private final int mProtocol;
private final Parcelable[] mInterfaces;
/**
* UsbDevice should only be instantiated by UsbService implementation
* @hide
*/
public UsbDevice(String name, int vendorId, int productId,
int Class, int subClass, int protocol, Parcelable[] interfaces) {
mName = name;
mVendorId = vendorId;
mProductId = productId;
mClass = Class;
mSubclass = subClass;
mProtocol = protocol;
mInterfaces = interfaces;
}
/**
* Returns the name of the device.
* In the standard implementation, this is the path of the device file
* for the device in the usbfs file system.
*
* @return the device name
*/
public String getDeviceName() {
return mName;
}
/**
* Returns a unique integer ID for the device.
* This is a convenience for clients that want to use an integer to represent
* the device, rather than the device name.
* IDs are not persistent across USB disconnects.
*
* @return the device ID
*/
public int getDeviceId() {
return getDeviceId(mName);
}
/**
* Returns a vendor ID for the device.
*
* @return the device vendor ID
*/
public int getVendorId() {
return mVendorId;
}
/**
* Returns a product ID for the device.
*
* @return the device product ID
*/
public int getProductId() {
return mProductId;
}
/**
* Returns the devices's class field.
* Some useful constants for USB device classes can be found in
* {@link android.hardware.usb.UsbConstants}
*
* @return the devices's class
*/
public int getDeviceClass() {
return mClass;
}
/**
* Returns the device's subclass field.
*
* @return the device's subclass
*/
public int getDeviceSubclass() {
return mSubclass;
}
/**
* Returns the device's subclass field.
*
* @return the device's protocol
*/
public int getDeviceProtocol() {
return mProtocol;
}
/**
* Returns the number of {@link android.hardware.usb.UsbInterface}s this device contains.
*
* @return the number of interfaces
*/
public int getInterfaceCount() {
return mInterfaces.length;
}
/**
* Returns the {@link android.hardware.usb.UsbInterface} at the given index.
*
* @return the interface
*/
public UsbInterface getInterface(int index) {
return (UsbInterface)mInterfaces[index];
}
@Override
public boolean equals(Object o) {
if (o instanceof UsbDevice) {
return ((UsbDevice)o).mName.equals(mName);
} else if (o instanceof String) {
return ((String)o).equals(mName);
} else {
return false;
}
}
@Override
public int hashCode() {
return mName.hashCode();
}
@Override
public String toString() {
return "UsbDevice[mName=" + mName + ",mVendorId=" + mVendorId +
",mProductId=" + mProductId + ",mClass=" + mClass +
",mSubclass=" + mSubclass + ",mProtocol=" + mProtocol +
",mInterfaces=" + mInterfaces + "]";
}
public static final Parcelable.Creator<UsbDevice> CREATOR =
new Parcelable.Creator<UsbDevice>() {
public UsbDevice createFromParcel(Parcel in) {
String name = in.readString();
int vendorId = in.readInt();
int productId = in.readInt();
int clasz = in.readInt();
int subClass = in.readInt();
int protocol = in.readInt();
Parcelable[] interfaces = in.readParcelableArray(UsbInterface.class.getClass Loader());
return new UsbDevice(name, vendorId, productId, clasz, subClass, protocol, interfaces);
}
public UsbDevice[] newArray(int size) {
return new UsbDevice[size];
}
};
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeString(mName);
parcel.writeInt(mVendorId);
parcel.writeInt(mProductId);
parcel.writeInt(mClass);
parcel.writeInt(mSubclass);
parcel.writeInt(mProtocol);
parcel.writeParcelableArray(mInterfaces, 0);
}
public static int getDeviceId(String name) {
return native_get_device_id(name);
}
public static String getDeviceName(int id) {
return native_get_device_name(id);
}
private static native int native_get_device_id(String name);
private static native String native_get_device_name(int id);
}