我正在研究Cordova插件进行一些重构，并且在启动时开始出现此崩溃信息：
--------- beginning of crash
12-12 21:42:29.791 4693 4693 E AndroidRuntime: FATAL EXCEPTION: main
12-12 21:42:29.791 4693 4693 E AndroidRuntime: Process: xyz.meris.app, PID: 4693
12-12 21:42:29.791 4693 4693 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{xyz.meris.app/xyz.meris.app.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.apache.cordova.CordovaPlugin.privateInitialize(java.lang.String, org.apache.cordova.CordovaInterface, org.apache.cordova.CordovaWebView, org.apache.cordova.CordovaPreferences)' on a null object reference
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3162)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3305)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1993)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:106)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.os.Looper.loop(Looper.java:216)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:7266)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.apache.cordova.CordovaPlugin.privateInitialize(java.lang.String, org.apache.cordova.CordovaInterface, org.apache.cordova.CordovaWebView, org.apache.cordova.CordovaPreferences)' on a null object reference
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.PluginManager.getPlugin(PluginManager.java:171)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.PluginManager.startupPlugins(PluginManager.java:97)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.PluginManager.init(PluginManager.java:86)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.CordovaWebViewImpl.init(CordovaWebViewImpl.java:117)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.CordovaActivity.init(CordovaActivity.java:149)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at org.apache.cordova.CordovaActivity.loadUrl(CordovaActivity.java:224)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at xyz.meris.app.MainActivity.onCreate(MainActivity.java:39)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7353)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7344)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1275)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3142)
12-12 21:42:29.791 4693 4693 E AndroidRuntime: ... 11 more
12-12 21:42:29.826 4693 4693 I Process : Sending signal. PID: 4693 SIG: 9
我四处搜寻，发现了一些类似的问题：
android onActivityResult: Attempt to invoke virtual method on a null object reference
Class Not Found Exception using custom cordova plugin
但是解决方案对我不起作用...
最佳答案
我从其他问题中得到了一些线索，因为我在重构，所以我一直在使用plugin.xml文件。
我注意到我与其他plugin.xml文件有此区别：
<feature name="CDVProcessLog">
<param name="android-package" value="xyz.meris.processlog.CDVProcessLog" />
<param name="onload" value="true" />
</feature>
<feature name="ProcessLog">
<param name="android-package" value="xyz.meris.processlog.ProcessLog" />
+ <param name="onload" value="true" />
</feature>
因为我复制了
<feature>标记并将其填充，所以我复制了onload参数。一旦删除了重复的onload参数，崩溃便停止了。编辑：
erp。原来我还有另一个导致此问题的错误。
删除
onload参数延迟加载的ProcessLog。所以以后我会得到一个空指针错误。我的真正问题是我的
.js文件没有用我的CordovaPlugin类名更新。我已将其从ProcessLog更改为CDVProcessLog。 ProcessLog现在具有处理日志的细节，并且CDVProcessLog主要使用cordova胶来调用ProcessLog中的方法。我的
.js文件需要更改： return new Promise((resolve, reject) => {
- exec(resolve, reject, 'ProcessLog', func, [...args]);
+ exec(resolve, reject, 'CDVProcessLog', func, [...args]);
});