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                            /Android
                        
                        /Android攻城狮的第二门课（第1季）

按照老师的代码写的，还是闪退。下面是错误代码。

10-05 21:45:43.645 7552-7552/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                 Process: com.mengmengda.gridview, PID: 7552
                                                 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mengmengda.gridview/com.mengmengda.gridview.MainActivity}: java.lang.ClassCastException: android.widget.GridLayout cannot be cast to android.widget.GridView
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2330)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:154)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:135)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5273)
                                                     at java.lang.reflect.Method.invoke(Native Method)
                                                     at java.lang.reflect.Method.invoke(Method.java:372)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
                                                  Caused by: java.lang.ClassCastException: android.widget.GridLayout cannot be cast to android.widget.GridView
                                                     at com.mengmengda.gridview.MainActivity.onCreate(MainActivity.java:28)
                                                     at android.app.Activity.performCreate(Activity.java:6041)
                                                     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1109)
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2283)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:154)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:135)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5273)
                                                     at java.lang.reflect.Method.invoke(Native Method)
                                                     at java.lang.reflect.Method.invoke(Method.java:372)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)

慕数据2535060

2016-10-05

源自：Android攻城狮的第二门课（第1季） 4-2

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天涯逐梦回答被采纳 +3 积分
2016-10-05

错误代码中的第四行android.widget.GridLayout cannot be cast to android.widget.GridView的意思应该是你layout布局文件中的布局方式写错了，老师教程里用的是LineLayout，而你用的是GridLayout。所以说可能是GridLayout不居中不能用GridView控件。。然后我也是初学者，，只能说是可能是这个问题