java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.love5/com.example.love5.Main11Activity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.
若有 java.lang.RuntimeException和 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.一起的异常报错,
很大几率是因为控件实列写错了,好好检查R.id.xx有没有写错,
多次的粗心大意犯的同样的错误,以此记录。
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