I'm using Galaxy SII (Android version 4.1.2), and I'm trying to build an app that can tell me if I connect an USB device.
I also have an OTG adapter (that works great..) When I connect a keyboard/mice, my Android recognizes them and I can use them smoothly.
In my code, I try to iterate over the connected devices, but it's like nothing is connected. This is my code:
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
// Get the list of attached devices
HashMap<String, UsbDevice> devices = manager.getDeviceList();
Toast.makeText(this, "Number of devices: " + devices.size(), Toast.LENGTH_LONG).show();
// Iterate over all devices
Iterator<String> it = devices.keySet().iterator();
while (it.hasNext())
{
String deviceName = it.next();
UsbDevice device = devices.get(deviceName);
String VID = Integer.toHexString(device.getVendorId()).toUpperCase();
String PID = Integer.toHexString(device.getProductId()).toUpperCase();
Toast.makeText(this, deviceName + " " + VID + ":" + PID + " " + manager.hasPermission(device), Toast.LENGTH_LONG).show();
}
This is the Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ipad"
android:versionCode="1"
android:versionName="1.0" >
<uses-feature android:name="android.hardware.usb.host"/>
<uses-sdk android:minSdkVersion="12" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<activity
android:name="com.example.ipad.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Thanks for your help :)
