java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content

時間 2019-12-08

標籤 java.lang.nullpointerexception java lang nullpointerexception attempt invoke virtual method java.lang.object object android.content android content 欄目 Java 简体版

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java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object referencejava 購物車報錯，android at and

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1. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object
2. java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourcePa
3. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja
4. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
5. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAd
6. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setTe
7. java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Vie
8. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
9. java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference
10. 調試很久的java.lang.NullPointerException: Attempt to invoke virtual method ...
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1. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object
2. java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourcePa
3. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja
4. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
5. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAd
6. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setTe
7. java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Vie
8. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
9. java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference
10. 調試很久的java.lang.NullPointerException: Attempt to invoke virtual method ...

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