解决Attempt to invoke virtual method '...ListAdapter'on a null object reference

时间 2019-12-05

标签解决 attempt invoke virtual method listadapter'on listadapter null object reference 繁體版

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解决：Attempt to invoke virtual method 'void android.widget.GridView.setAdapter(android.widget.ListAdapter)' on a null object referencejava 在使用GirdView和ListView时常常会报这个错，仔细看错误信息发现是 NullPointerException，de

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1. java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference
2. @BindView问题 Attempt to invoke virtual method 'void android ...' on a null object reference
3. 高德地图（Attempt to invoke virtual method 'void com.amap.api.maps.MapView.onDestroy()' on a null object）
4. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object
5. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
6. java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourcePa
7. Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object
8. Attempt to invoke virtual method ‘...’ on a null object reference 错误，Activity页面跳转失败
9. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
10. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja
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1. java.lang.NullPointerException: Attempt to invoke virtual method .....on a null object reference
2. @BindView问题 Attempt to invoke virtual method 'void android ...' on a null object reference
3. 高德地图（Attempt to invoke virtual method 'void com.amap.api.maps.MapView.onDestroy()' on a null object）
4. java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object
5. Attempt to invoke virtual method android.webkit.WebSettings android.webkit.WebView.getSettings()
6. java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourcePa
7. Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object
8. Attempt to invoke virtual method ‘...’ on a null object reference 错误，Activity页面跳转失败
9. java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportant
10. java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(ja

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