android studio 運行活動閃退Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'vo

時間 2021-01-02

標籤 eclipse_android_tomcat_mysql 欄目 Android 简体版

原文原文鏈接

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference at com.example

>>阅读原文<<

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 'android.view.View android.view.Vie
4. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setTe
5. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
6. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content
7. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAd
8. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
9. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja
10. NullPointerException: Attempt to invoke virtual method 'int com.huawei.lcagent.client.LogCollectMana
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java.lang.nullpointerexception

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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 'android.view.View android.view.Vie
4. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setTe
5. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
6. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content
7. java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setAd
8. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
9. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja
10. NullPointerException: Attempt to invoke virtual method 'int com.huawei.lcagent.client.LogCollectMana

>>更多相關文章<<