I created a simple activity to test the incoming of intent by attached/detached the USB device into my android tablet. I start activity and try to attached USB and at that moment pop up error "application .... stopped working." appears. The same thing appears when I start the application with USB cable connected and than I try disconnect the USB.
Hint: This example is only for the test. I need to write a service that will automatically receive data from the device via USB and upload them to the server (this part is already operational). Now I deal with how to automaticly start the service, and the best will come to me at the moment when USB device connects.
Consideration 1 : The problem may be the wrong way to device_filter? The system sends intent to Receiver and he wants to handle it, but do not find device_filter and than fall? I try path : TestUSB.xml.device_filter.xml or TestUSB.Resources.xml.device_filter.xml but without success.
Consideration 2 : Incorrectly configured AndroidManifest.xml and missing some privileges?
Consideration 3 : Or a problem in the tablet / OS? Currently I have a different hardware on which to test it.
I use a tablet alps 874v3 android 4.4.2 and USB device is our special hardware with FTDI chip.
I use Visual studio 2010 with Xamarin to write Android app in .net
[Activity(Label = "TestUSB", MainLauncher= true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
int count = 0;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
Button button = FindViewById<Button>(Resource.Id.MyButton);
button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
}
}
public class UsbBroadcastReceiver : BroadcastReceiver
{
public UsbBroadcastReceiver()
{
}
public override void OnReceive(Context context, Intent intent)
{
InvokeAbortBroadcast();
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="TestUSB.TestUSB" android:versionCode="1" android:versionName="1.0" android:installLocation="auto">
<uses-sdk android:minSdkVersion="15" android:targetSdkVersion="19" />
<application android:label="TestUSB" android:icon="@drawable/Icon" android:launchMode="singleTask">
<receiver android:enabled="true" android:exported="true" android:name=".UsbBroadcastReceiver" android:launchMode="singleTask">
<uses-feature android:name="android.hardware.usb.host" android:required="false" />
<uses-permission android:name="android.permission.USB_PERMISSION" />
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
<action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
</intent-filter>
<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />
</receiver>
</application>
</manifest>
device_filter.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!--<usb-device vendor-id="0403" product-id="6001" /> FTDI FT232R UART in hexa-->
<usb-device vendor-id="1027" product-id="24577" /><!--FTDI FT232R UART in decimal-->
</resources>
**EDIT : ** I borrowed another new phone Huawei and tried there.It acts like a tablet
Actual LOG
D/ActivityManager( 654): AP_PROF:AppLaunch_LaunchTime:TestUSB.TestUSB/md537e255c671aa66f9ada9a57df4bd0038.MainActivity:1104:3576760
D/ActivityManager( 654): ACT-IDLE_NOW_MSG from windowsVisible() for idle: ActivityRecord{41fd3280 u0 TestUSB.TestUSB/md537e255c671aa66f9ada9a57df4bd0038.MainActivity t33}
W/UsbSettingsManager( 654): no meta-data for ResolveInfo{4266c658 TestUSB.TestUSB/md537e255c671aa66f9ada9a57df4bd0038.MainActivity m=0x108000}
W/System.err( 7880): java.lang.RuntimeException: Unable to instantiate receiver
TestUSB.TestUSB.UsbBroadcastReceiver: java.lang.ClassNotFoundException:
Didn't find class "TestUSB.TestUSB.UsbBroadcastReceiver" on path:
DexPathList[[zip file "/data/app/TestUSB.TestUSB-1.apk"],nativeLibraryDirectories=[/data/app-lib/TestUSB.TestUSB-1,
/vendor/lib, /system/lib]]
AndroidManifest.xml generated by VS+Xamarin :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="TestUSB.TestUSB" android:versionCode="1" android:versionName="1.0">
<uses-sdk android:minSdkVersion="11" />
<application android:label="TestUSB" android:icon="@drawable/icon" android:name="mono.android.app.Application" android:debuggable="true">
<receiver android:enabled="true" android:exported="true" android:name=".UsbBroadcastReceiver" android:launchMode="singleTask">
<uses-feature android:name="android.hardware.usb.host" android:required="false" />
<uses-permission android:name="android.permission.USB_PERMISSION" />
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
<action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
</intent-filter>
<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />
<meta-data android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" android:resource="@xml/device_filter" />
<!--<intent-filter>
<action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED" />
</intent-filter>
<meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED" android:resource="@xml/accessory_filter" />-->
</receiver>
<activity android:icon="@drawable/icon" android:label="TestUSB" android:name="md537e255c671aa66f9ada9a57df4bd0038.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
<action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
</intent-filter>
</activity>
<provider android:name="mono.MonoRuntimeProvider" android:exported="false" android:initOrder="2147483647" android:authorities="TestUSB.TestUSB.mono.MonoRuntimeProvider.__mono_init__" />
<receiver android:name="mono.android.Seppuku">
<intent-filter>
<action android:name="mono.android.intent.action.SEPPUKU" />
<category android:name="mono.android.intent.category.SEPPUKU.TestUSB.TestUSB" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
</manifest>
The problem was that the system incorrectly found the receiver. The Xamarin projects registration receiver / activities have not be in AndroidManifest.xml, but must register for the relevant class as attributes.
[BroadcastReceiver(Enabled=true,Exported=true,Permission="android.permission.USB_PERMISSION")]
[UsesLibrary("android.hardware.usb.host", Required = true)]
[MetaData("android.hardware.usb.action.USB_DEVICE_ATTACHED", Resource = "@xml/device_filter")]
[MetaData("android.hardware.usb.action.USB_DEVICE_DETACHED", Resource = "@xml/device_filter")]
[IntentFilter(new string[] { "android.hardware.usb.action.USB_DEVICE_ATTACHED", "android.hardware.usb.action.USB_DEVICE_DETACHED" })]
public class UsbBroadcastReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
if (intent != null) Log.Debug("testusb", string.Format("OnReceive - {0} ", intent.Action));
}
}