09-24 12:56:16.471: E/AndroidRuntime(10696): FATAL EXCEPTION: main 09-24 12:56:16.471: E/AndroidRuntime(10696): Process: com.example.nongmin, PID: 10696 09-24 12:56:16.471: E/AndroidRuntime(10696): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want? 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.app.ContextImpl.startActivity(ContextImpl.java:1218) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.app.ContextImpl.startActivity(ContextImpl.java:1205) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.content.ContextWrapper.startActivity(ContextWrapper.java:311) 09-24 12:56:16.471: E/AndroidRuntime(10696): at com.jarvis.mybook.BookListAdapter$ClickListener.onClick(BookListAdapter.java:119) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.view.View.performClick(View.java:4632) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.view.View$PerformClick.run(View.java:19385) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.os.Handler.handleCallback(Handler.java:808) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.os.Handler.dispatchMessage(Handler.java:103) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.os.Looper.loop(Looper.java:193) 09-24 12:56:16.471: E/AndroidRuntime(10696): at android.app.ActivityThread.main(ActivityThread.java:5348) 09-24 12:56:16.471: E/AndroidRuntime(10696): at java.lang.reflect.Method.invokeNative(Native Method) 09-24 12:56:16.471: E/AndroidRuntime(10696): at java.lang.reflect.Method.invoke(Method.java:515) 09-24 12:56:16.471: E/AndroidRuntime(10696): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829) 09-24 12:56:16.471: E/AndroidRuntime(10696): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645)
09-24 12:56:16.471: E/AndroidRuntime(10696): at dalvik.system.NativeStart.main(Native Method)
错误原因：
Caused by: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
Context中有一个startActivity方法，Activity继承自Context，重载了startActivity方法。如果使用Activity的startActivity方法，不会有任何限制，而如果使用Context的startActivity方法的话，就需要开启一个新的task，遇到上面那个异常的，都是因为使用了Context的startActivity方法。解决办法是，加一个flag。
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
09-24 13:19:06.821: E/libEGL(12237): call to OpenGL ES API with no current context (logged once per thread) 09-24 13:19:06.850: E/AndroidRuntime(12237): FATAL EXCEPTION: main 09-24 13:19:06.850: E/AndroidRuntime(12237): Process: com.example.nongmin, PID: 12237 09-24 13:19:06.850: E/AndroidRuntime(12237): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.RelativeLayout$DependencyGraph.findRoots(RelativeLayout.java:1893) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.RelativeLayout$DependencyGraph.getSortedViews(RelativeLayout.java:1838) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.RelativeLayout.sortChildren(RelativeLayout.java:390) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:398) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.ListView.measureScrapChild(ListView.java:1503) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.ListView.measureHeightOfChildren(ListView.java:1571) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.ListView.onMeasure(ListView.java:1478) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1616) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureVertical(LinearLayout.java:729) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.onMeasure(LinearLayout.java:601) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1616) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1189) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.onMeasure(LinearLayout.java:603) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1488) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1616) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureVertical(LinearLayout.java:729) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.onMeasure(LinearLayout.java:601) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.FrameLayout.onMeasure(FrameLayout.java:332) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1616) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureVertical(LinearLayout.java:729) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.onMeasure(LinearLayout.java:601) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.FrameLayout.onMeasure(FrameLayout.java:332) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1616) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.measureVertical(LinearLayout.java:729) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.LinearLayout.onMeasure(LinearLayout.java:601) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.widget.FrameLayout.onMeasure(FrameLayout.java:332) 09-24 13:19:06.850: E/AndroidRuntime(12237): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2547) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.View.measure(View.java:17437) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2788) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1444) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1885) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1321) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6935) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.Choreographer.doCallbacks(Choreographer.java:591) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.Choreographer.doFrame(Choreographer.java:560) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.os.Handler.handleCallback(Handler.java:808) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.os.Handler.dispatchMessage(Handler.java:103) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.os.Looper.loop(Looper.java:193) 09-24 13:19:06.850: E/AndroidRuntime(12237): at android.app.Act
错误原因：我布局立面用的是relativeLayout布局，但是在我的adapter立面我重新给他设置大小的时候调用的确实linearLayout布局
