Hi all, I had used DexClassLoader to execute the code of other application dynamically. I am calling method display() of another application from my application. The display() method will just show the Toast pop up.
The following is the code of my running application DexClassLoader dLoader = new DexClassLoader("/data/app/ android.testcase.apk","/data/app- private",null,ClassLoader.getSystemClassLoader()); try { Class cLoad = dLoader.loadClass("android.testcase.TestCase"); //Class[] param = new Class[] {Bundle.class}; Method mLoad = cLoad.getMethod("display",null); Object obj = cLoad.newInstance(); mLoad.invoke(obj); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } The method display() in the other android.testcase.apk is as follows, public void display() { Toast.makeText(this, "Loaded properly",Toast.LENGTH_SHORT).show (); } But this gives Exception and stacktrace as follows 05-13 20:10:22.155: WARN/System.err(773): java.lang.reflect.InvocationTargetException 05-13 20:10:22.166: WARN/System.err(773): at android.testcase.TestCase.dispaly(TestCase.java:23) 05-13 20:10:22.176: WARN/System.err(773): at java.lang.reflect.Method.invokeNative(Native Method) 05-13 20:10:22.186: WARN/System.err(773): at java.lang.reflect.Method.invoke(Method.java:521) 05-13 20:10:22.194: WARN/System.err(773): at android.loaduiapp.LoadUiApp$1.onClick(LoadUiApp.java:28) 05-13 20:10:22.194: WARN/System.err(773): at android.view.View.performClick(View.java:2179) 05-13 20:10:22.204: WARN/System.err(773): at android.view.View.onTouchEvent(View.java:3828) 05-13 20:10:22.204: WARN/System.err(773): at android.widget.TextView.onTouchEvent(TextView.java:6291) 05-13 20:10:22.216: WARN/System.err(773): at android.view.View.dispatchTouchEvent(View.java:3368) 05-13 20:10:22.225: WARN/System.err(773): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 05-13 20:10:22.235: WARN/System.err(773): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 05-13 20:10:22.246: WARN/System.err(773): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 05-13 20:10:22.256: WARN/System.err(773): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 05-13 20:10:22.256: WARN/System.err(773): at com.android.internal.policy.impl.PhoneWindow $DecorView.superDispatchTouchEvent(PhoneWindow.java:1707) 05-13 20:10:22.266: WARN/System.err(773): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent (PhoneWindow.java:1197) 05-13 20:10:22.266: WARN/System.err(773): at android.app.Activity.dispatchTouchEvent(Activity.java:1993) 05-13 20:10:22.275: WARN/System.err(773): at com.android.internal.policy.impl.PhoneWindow $DecorView.dispatchTouchEvent(PhoneWindow.java:1691) 05-13 20:10:22.284: WARN/System.err(773): at android.view.ViewRoot.handleMessage(ViewRoot.java:1525) 05-13 20:10:22.284: WARN/System.err(773): at android.os.Handler.dispatchMessage(Handler.java:99) 05-13 20:10:22.297: WARN/System.err(773): at android.os.Looper.loop (Looper.java:123) 05-13 20:10:22.305: WARN/System.err(773): at android.app.ActivityThread.main(ActivityThread.java:3948) 05-13 20:10:22.305: WARN/System.err(773): at java.lang.reflect.Method.invokeNative(Native Method) 05-13 20:10:22.305: WARN/System.err(773): at java.lang.reflect.Method.invoke(Method.java:521) 05-13 20:10:22.314: WARN/System.err(773): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:782) 05-13 20:10:22.314: WARN/System.err(773): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 05-13 20:10:22.324: WARN/System.err(773): at dalvik.system.NativeStart.main(Native Method) 05-13 20:10:22.336: WARN/System.err(773): Caused by: java.lang.NullPointerException 05-13 20:10:22.454: DEBUG/dalvikvm(773): GC freed 4388 objects / 414064 bytes in 115ms 05-13 20:10:22.466: WARN/System.err(773): at android.content.ContextWrapper.getResources(ContextWrapper.java:79) 05-13 20:10:22.466: WARN/System.err(773): at android.widget.Toast.<init>(Toast.java:88) 05-13 20:10:22.477: WARN/System.err(773): at android.widget.Toast.makeText(Toast.java:230) 05-13 20:10:22.485: WARN/System.err(773): ... 25 more Please Help. Am I missing something?? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---