                        课程
                    
                        /移动开发
                        
                            /Android
                        
                        /Android攻城狮的第二门课（第1季）

点击静态加载后程序直接崩掉这是什么问题啊

02-10 11:51:15.804: E/AndroidRuntime(2482): FATAL EXCEPTION: main
02-10 11:51:15.804: E/AndroidRuntime(2482): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.fragment/com.example.fragment.MainActivity2}; have you declared this activity in your AndroidManifest.xml?
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.app.Activity.startActivityForResult(Activity.java:3190)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.app.Activity.startActivity(Activity.java:3297)
02-10 11:51:15.804: E/AndroidRuntime(2482): at com.example.fragment.MainActivity$1.onCheckedChanged(MainActivity.java:25)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.RadioGroup.setCheckedId(RadioGroup.java:172)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.RadioGroup.access$600(RadioGroup.java:52)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.RadioGroup$CheckedStateTracker.onCheckedChanged(RadioGroup.java:342)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.CompoundButton.setChecked(CompoundButton.java:128)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.CompoundButton.toggle(CompoundButton.java:87)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.RadioButton.toggle(RadioButton.java:75)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.widget.CompoundButton.performClick(CompoundButton.java:99)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.view.View$PerformClick.run(View.java:14105)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.os.Handler.handleCallback(Handler.java:605)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.os.Handler.dispatchMessage(Handler.java:92)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.os.Looper.loop(Looper.java:137)
02-10 11:51:15.804: E/AndroidRuntime(2482): at android.app.ActivityThread.main(ActivityThread.java:4424)
02-10 11:51:15.804: E/AndroidRuntime(2482): at java.lang.reflect.Method.invokeNative(Native Method)
02-10 11:51:15.804: E/AndroidRuntime(2482): at java.lang.reflect.Method.invoke(Method.java:511)
02-10 11:51:15.804: E/AndroidRuntime(2482): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-10 11:51:15.804: E/AndroidRuntime(2482): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-10 11:51:15.804: E/AndroidRuntime(2482): at dalvik.system.NativeStart.main(Native Method)