File Transfer using OBEX on Android

by Amit » Sat, 17 Jul 2010 02:23:36 GMT


Sponsored Links
 Hi,

I want to transfer a file from my Android application to my desktop (I
don't want to display any UI for the user)

I could not find any documentation or links which suggest me how to
transfer the file programatically.

Thanks
Amit

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File Transfer using OBEX on Android

by FrankG » Mon, 19 Jul 2010 14:52:19 GMT


 Obex via Bluetooth or USB ?

Independent from this question, IMHO their is no
support for that in the SDK.

Good luck !

  Frank





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2. crypto DES

Hello, I have tried DES crypto in Android but, when I launch the
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[code]import java.security.*;
import javax.crypto.*;

//
// encrypt and decrypt using the DES private key algorithm

public class PrivateExample {

   public static void main(String[] args) throws Exception {
      //
      // check args and get plaintext
      if (args.length != 1) {
         System.err.println("Usage: java PrivateExample text");
         System.exit(1);
      }

//    byte[] plainText = args[0].getBytes("UTF8");
      String ss = "Hello world, haris is here!";
      byte[] plainText = ss.getBytes();
      //
      // get a DES private key
      System.out.println("\nStart generating DES key");
      KeyGenerator keyGen = KeyGenerator.getInstance("DES");
      keyGen.init(56);
      Key key = keyGen.generateKey();
      System.out.println("Finish generating DES key");
      //
      // get a DES cipher object and print the provider
      Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
      System.out.println("\n" + cipher.getProvider().getInfo());
      //
      // encrypt using the key and the plaintext
      System.out.println("\nStart encryption");
      cipher.init(Cipher.ENCRYPT_MODE, key);
      byte[] cipherText = cipher.doFinal(plainText);
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      System.out.println(new String(cipherText, "UTF8"));

      //
      // decrypt the ciphertext using the same key
      System.out.println("\nStart decryption");
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] newPlainText = cipher.doFinal(cipherText);
      System.out.println("Finish decryption: ");

      System.out.println(new String(newPlainText, "UTF8"));
   }
}
[/code]
logcat
[code]03-27 11:28:07.313: ERROR/vold(26): Error opening switch name
path '/sys/class/switch/test2' (No such file or directory)
03-27 11:28:07.313: ERROR/vold(26): Error bootstrapping switch '/sys/
class/switch/test2' (No such file or directory)
03-27 11:28:07.313: ERROR/vold(26): Error opening switch name path '/
sys/class/switch/test' (No such file or directory)
03-27 11:28:07.313: ERROR/vold(26): Error bootstrapping switch '/sys/
class/switch/test' (No such file or directory)
03-27 11:28:18.263: ERROR/MemoryHeapBase(51): error opening /dev/pmem:
No such file or directory
03-27 11:28:18.263: ERROR/SurfaceFlinger(51): Couldn't open /sys/power/
wait_for_fb_sleep or /sys/power/wait_for_fb_wake
03-27 11:28:18.383: ERROR/libEGL(51): couldn't load <libhgl.so>
library (Cannot load library: load_library[984]: Library 'libhgl.so'
not found)
03-27 11:28:18.813: ERROR/libEGL(62): couldn't load <libhgl.so>
library (Cannot load library: load_library[984]: Library 'libhgl.so'
not found)
03-27 11:28:22.663: ERROR/BatteryService(51): Could not open '/sys/
class/power_supply/usb/online'
03-27 11:28:22.663: ERROR/BatteryService(51): Could not open '/sys/
class/power_supply/battery/batt_vol'
03-27 11:28:22.663: ERROR/BatteryService(51): Could not open '/sys/
class/power_supply/battery/batt_temp'
03-27 11:28:23.283: ERROR/EventHub(51): could not get driver version
for /dev/input/mouse0, Not a typewriter
03-27 11:28:23.283: ERROR/EventHub(51): could not get driver version
for /dev/input/mice, Not a typewriter
03-27 11:28:23.593: ERROR/System(51): Failure starting core service
03-27 11:28:23.593: ERROR/System(51): java.lang.SecurityException
03-27 11:28:23.593: ERROR/System(51):     at
android.os.BinderProxy.transact(Native Method)
03-27 11:28:23.593: ERROR/System(51):     at
android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:
146)
03-27 11:28:23.593: ERROR/System(51):     at
android.os.ServiceManager.addService(ServiceManager.java:72)
03-27 11:28:23.593: ERROR/System(51):     at
com.android.server.ServerThread.run(SystemServer.java:162)
03-27 11:28:23.604: ERROR/AndroidRuntime(51): Crash logging skipped,
no checkin service
03-27 11:28:24.833: ERROR/LockPatternKeyguardView(51): Failed to bind
to GLS while checking for account
03-27 11:28:30.283: ERROR/ActivityThread(111): Failed to find provider
info for com.google.settings
03-27 11:28:30.293: ERROR/ActivityThread(111): Failed to find provider
info for com.google.settings
03-27 11:28:31.283: ERROR/ApplicationContext(51): Couldn't create
directory for SharedPreferences file shared_prefs/wallpaper-hints.xml
03-27 11:28:34.193: ERROR/vold(26): Cannot start volume '/
sdcard' (volume is not bound)
03-27 11:28:32.279: ERROR/ActivityThread(109): Failed to find provider
info for android.server.checkin
03-27 11:28:34.229: ERROR/ActivityThread(109): Failed to find provider
info for android.server.checkin
03-27 11:28:34.419: ERROR/ActivityThread(109): Failed to find provider
info for android.server.checkin
03-27 11:28:36.059: ERROR/MediaPlayerService(30): Couldn't open fd for
content://settings/system/notification_sound
03-27 11:28:36.149: ERROR/MediaPlayer(51): Unable to to create media
player
03-27 11:28:36.699: ERROR/jdwp(207): Failed sending reply to de{*filter*}:
Broken pipe
03-27 11:28:39.128: ERROR/AndroidRuntime(222): Uncaught handler:
thread main exiting due to uncaught exception
03-27 11:28:39.139: ERROR/AndroidRuntime(222):
java.lang.RuntimeException: Unable to instantiate activity
ComponentInfo{example.com.cryptage/example.com.cryptage.main}:
java.lang.ClassNotFoundException: example.com.cryptage.main in loader
dalvik.system.PathClassLoader@4376ac98
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2324)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2417)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread.access$2100(ActivityThread.java:116)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.os.Handler.dispatchMessage(Handler.java:99)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.os.Looper.loop(Looper.java:123)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread.main(ActivityThread.java:4203)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
java.lang.reflect.Method.invokeNative(Native Method)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
java.lang.reflect.Method.invoke(Method.java:521)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:791)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
dalvik.system.NativeStart.main(Native Method)
03-27 11:28:39.139: ERROR/AndroidRuntime(222): Caused by:
java.lang.ClassNotFoundException: example.com.cryptage.main in loader
dalvik.system.PathClassLoader@4376ac98
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
java.lang.ClassLoader.loadClass(ClassLoader.java:573)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
java.lang.ClassLoader.loadClass(ClassLoader.java:532)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.Instrumentation.newActivity(Instrumentation.java:1097)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2316)
03-27 11:28:39.139: ERROR/AndroidRuntime(222):     ... 11 more
03-27 11:28:39.178: ERROR/dalvikvm(222): Unable to open stack trace
file '/data/anr/traces.txt': Permission denied
03-27 11:28:40.638: ERROR/ActivityThread(51): Failed to find provider
info for com.google.settings
03-27 11:28:40.638: ERROR/ActivityThread(51): Failed to find provider
info for com.google.settings
[/code]

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