Application stops with message like "Unfortunately Soduku has Stopped"
<p>I am totally new to Android . I am using the book Hello, Android. I have created a button for "about" that displays information about the sudoku game. But as soon as i click it, the application stops saying "Unfortunately sudoku has stopped".</p>

<p>02-22 09:27:27.693: E/AndroidRuntime(554): FATAL EXCEPTION: main 02-22 09:27:27.693: E/AndroidRuntime(554): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.sudoku/org.example.sudoku.About}: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread.access$600(ActivityThread.java:123) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.os.Handler.dispatchMessage(Handler.java:99) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.os.Looper.loop(Looper.java:137) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread.main(ActivityThread.java:4424) 02-22 09:27:27.693: E/AndroidRuntime(554): at java.lang.reflect.Method.invokeNative(Native Method) 02-22 09:27:27.693: E/AndroidRuntime(554): at java.lang.reflect.Method.invoke(Method.java:511) 02-22 09:27:27.693: E/AndroidRuntime(554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-22 09:27:27.693: E/AndroidRuntime(554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-22 09:27:27.693: E/AndroidRuntime(554): at dalvik.system.NativeStart.main(Native Method) 02-22 09:27:27.693: E/AndroidRuntime(554): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 02-22 09:27:27.693: E/AndroidRuntime(554): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.Activity.setContentView(Activity.java:1835) 02-22 09:27:27.693: E/AndroidRuntime(554): at org.example.sudoku.About.onCreate(About.java:9) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.Activity.performCreate(Activity.java:4465) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 02-22 09:27:27.693: E/AndroidRuntime(554): ... 11 more 02-22 09:27:27.693: E/AndroidRuntime(554): Caused by: java.lang.ClassNotFoundException: android.view.scrollview 02-22 09:27:27.693: E/AndroidRuntime(554): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 02-22 09:27:27.693: E/AndroidRuntime(554): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 02-22 09:27:27.693: E/AndroidRuntime(554): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.createView(LayoutInflater.java:552) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636) 02-22 09:27:27.693: E/AndroidRuntime(554): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653) 02-22 09:27:27.693: E/AndroidRuntime(554): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678) 02-22 09:27:27.693: E/AndroidRuntime(554): ... 20 more 02-22 09:30:52.675: E/AndroidRuntime(582): FATAL EXCEPTION: main 02-22 09:30:52.675: E/AndroidRuntime(582): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.sudoku/org.example.sudoku.About}: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread.access$600(ActivityThread.java:123) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.os.Handler.dispatchMessage(Handler.java:99) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.os.Looper.loop(Looper.java:137) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread.main(ActivityThread.java:4424) 02-22 09:30:52.675: E/AndroidRuntime(582): at java.lang.reflect.Method.invokeNative(Native Method) 02-22 09:30:52.675: E/AndroidRuntime(582): at java.lang.reflect.Method.invoke(Method.java:511) 02-22 09:30:52.675: E/AndroidRuntime(582): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-22 09:30:52.675: E/AndroidRuntime(582): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-22 09:30:52.675: E/AndroidRuntime(582): at dalvik.system.NativeStart.main(Native Method) 02-22 09:30:52.675: E/AndroidRuntime(582): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 02-22 09:30:52.675: E/AndroidRuntime(582): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.Activity.setContentView(Activity.java:1835) 02-22 09:30:52.675: E/AndroidRuntime(582): at org.example.sudoku.About.onCreate(About.java:9) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.Activity.performCreate(Activity.java:4465) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 02-22 09:30:52.675: E/AndroidRuntime(582): ... 11 more 02-22 09:30:52.675: E/AndroidRuntime(582): Caused by: java.lang.ClassNotFoundException: android.view.scrollview 02-22 09:30:52.675: E/AndroidRuntime(582): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 02-22 09:30:52.675: E/AndroidRuntime(582): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 02-22 09:30:52.675: E/AndroidRuntime(582): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.createView(LayoutInflater.java:552) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636) 02-22 09:30:52.675: E/AndroidRuntime(582): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653) 02-22 09:30:52.675: E/AndroidRuntime(582): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678) 02-22 09:30:52.675: E/AndroidRuntime(582): ... 20 more 02-22 09:35:04.594: E/AndroidRuntime(596): FATAL EXCEPTION: main 02-22 09:35:04.594: E/AndroidRuntime(596): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.sudoku/org.example.sudoku.About}: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread.access$600(ActivityThread.java:123) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.os.Handler.dispatchMessage(Handler.java:99) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.os.Looper.loop(Looper.java:137) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread.main(ActivityThread.java:4424) 02-22 09:35:04.594: E/AndroidRuntime(596): at java.lang.reflect.Method.invokeNative(Native Method) 02-22 09:35:04.594: E/AndroidRuntime(596): at java.lang.reflect.Method.invoke(Method.java:511) 02-22 09:35:04.594: E/AndroidRuntime(596): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-22 09:35:04.594: E/AndroidRuntime(596): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-22 09:35:04.594: E/AndroidRuntime(596): at dalvik.system.NativeStart.main(Native Method) 02-22 09:35:04.594: E/AndroidRuntime(596): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 02-22 09:35:04.594: E/AndroidRuntime(596): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.Activity.setContentView(Activity.java:1835) 02-22 09:35:04.594: E/AndroidRuntime(596): at org.example.sudoku.About.onCreate(About.java:9) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.Activity.performCreate(Activity.java:4465) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 02-22 09:35:04.594: E/AndroidRuntime(596): ... 11 more 02-22 09:35:04.594: E/AndroidRuntime(596): Caused by: java.lang.ClassNotFoundException: android.view.scrollview 02-22 09:35:04.594: E/AndroidRuntime(596): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 02-22 09:35:04.594: E/AndroidRuntime(596): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 02-22 09:35:04.594: E/AndroidRuntime(596): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.createView(LayoutInflater.java:552) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636) 02-22 09:35:04.594: E/AndroidRuntime(596): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653) 02-22 09:35:04.594: E/AndroidRuntime(596): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678) 02-22 09:35:04.594: E/AndroidRuntime(596): ... 20 more 02-22 09:43:32.034: E/AndroidRuntime(610): FATAL EXCEPTION: main 02-22 09:43:32.034: E/AndroidRuntime(610): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.sudoku/org.example.sudoku.About}: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread.access$600(ActivityThread.java:123) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.os.Handler.dispatchMessage(Handler.java:99) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.os.Looper.loop(Looper.java:137) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread.main(ActivityThread.java:4424) 02-22 09:43:32.034: E/AndroidRuntime(610): at java.lang.reflect.Method.invokeNative(Native Method) 02-22 09:43:32.034: E/AndroidRuntime(610): at java.lang.reflect.Method.invoke(Method.java:511) 02-22 09:43:32.034: E/AndroidRuntime(610): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-22 09:43:32.034: E/AndroidRuntime(610): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-22 09:43:32.034: E/AndroidRuntime(610): at dalvik.system.NativeStart.main(Native Method) 02-22 09:43:32.034: E/AndroidRuntime(610): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class scrollview 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:691) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 02-22 09:43:32.034: E/AndroidRuntime(610): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.Activity.setContentView(Activity.java:1835) 02-22 09:43:32.034: E/AndroidRuntime(610): at org.example.sudoku.About.onCreate(About.java:9) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.Activity.performCreate(Activity.java:4465) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 02-22 09:43:32.034: E/AndroidRuntime(610): ... 11 more 02-22 09:43:32.034: E/AndroidRuntime(610): Caused by: java.lang.ClassNotFoundException: android.view.scrollview 02-22 09:43:32.034: E/AndroidRuntime(610): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 02-22 09:43:32.034: E/AndroidRuntime(610): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 02-22 09:43:32.034: E/AndroidRuntime(610): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.createView(LayoutInflater.java:552) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:636) 02-22 09:43:32.034: E/AndroidRuntime(610): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653) 02-22 09:43:32.034: E/AndroidRuntime(610): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678) 02-22 09:43:32.034: E/AndroidRuntime(610): ... 20 more</p>
