Android开发怎么用logcat查看错误？

06-01 05:27:05.708: D/AndroidRuntime(957): Shutting down VM
06-01 05:27:05.708: W/dalvikvm(957): threadid=1: thread exiting with uncaught exception (group=0x414c4700)
06-01 05:27:05.797: D/dalvikvm(957): GC_FOR_ALLOC freed 78K, 5% free 2940K/3072K, paused 24ms, total 26ms
06-01 05:27:05.797: E/AndroidRuntime(957): FATAL EXCEPTION: main
06-01 05:27:05.797: E/AndroidRuntime(957): java.lang.NullPointerException
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.AbsListView.obtainView(AbsListView.java:2179)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.GridView.onMeasure(GridView.java:1040)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.View.measure(View.java:15848)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:477)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.View.measure(View.java:15848)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.View.measure(View.java:15848)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
06-01 05:27:05.797: E/AndroidRuntime(957): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:302)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.View.measure(View.java:15848)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5008)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
06-01 05:27:05.797: E/AndroidRuntime(957): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.View.measure(View.java:15848)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.Choreographer.doFrame(Choreographer.java:532)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.os.Handler.handleCallback(Handler.java:730)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.os.Handler.dispatchMessage(Handler.java:92)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.os.Looper.loop(Looper.java:137)
06-01 05:27:05.797: E/AndroidRuntime(957): at android.app.ActivityThread.main(ActivityThread.java:5103)
06-01 05:27:05.797: E/AndroidRuntime(957): at java.lang.reflect.Method.invokeNative(Native Method)
06-01 05:27:05.797: E/AndroidRuntime(957): at java.lang.reflect.Method.invoke(Method.java:525)
06-01 05:27:05.797: E/AndroidRuntime(957): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
06-01 05:27:05.797: E/AndroidRuntime(957): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
06-01 05:27:05.797: E/AndroidRuntime(957): at dalvik.system.NativeStart.main(Native Method)

这个错误是android内部的错误

06-01 05:27:05.797: E/AndroidRuntime(957): java.lang.NullPointerException //说明是空指针异常
检查AbsListView.java的2179行，是否有空指针?

onMeasure这个是计算高度的方法，空指针肯定是这个里面有报空的，看看你的控件使用。