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Could not execute method of the activity
java.lang.IllegalStateException: Could not execute method of the activity at android.view.View$1.onClick(View.java:3969) at android.view.View.performClick(View.java:4640) at android.view.View$PerformClick.run(View.java:19431) at android.os.Handler.handleCallback(Handler.java:733) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:146) at android.app.ActivityThread.main(ActivityThread.java:5598) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099) at dalvik.system.NativeStart.main(Native Method)Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at android.view.View$1.onClick(View.java:3964) ... 11 moreCaused by: java.lang.NoClassDefFoundError: com.itextpdf.text.Document at com.example.pdfandroid.MainActivity.createPDF(MainActivity.java:36) ... 14 more