Android XmlResourceParser,ProviderInfo.loadXmlMetaData on a null object reference

    --------- beginning of crash
2024-12-16 15:58:06.036 24405-24405/com.buyuphk.specialline1 E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.buyuphk.specialline1, PID: 24405
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
        at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:605)
        at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:579)
        at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:417)
        at com.buyuphk.specialline1.mvp.ui.activity.UploadSignedPhotoActivity.openCamera(UploadSignedPhotoActivity.java:170)
        at com.buyuphk.specialline1.mvp.ui.activity.UploadSignedPhotoActivity.onClick(UploadSignedPhotoActivity.java:140)
        at android.view.View.performClick(View.java:7570)
        at android.view.View.performClickInternal(View.java:7540)
        at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
        at android.view.View$PerformClick.run(View.java:29721)
        at android.os.Handler.handleCallback(Handler.java:942)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:240)
        at android.os.Looper.loop(Looper.java:351)
        at android.app.ActivityThread.main(ActivityThread.java:8423)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:584)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1013)
2024-12-16 15:58:06.037 24405-24405/com.buyuphk.specialline1 D/debug: 打印抛出没有捕获到异常的线程名->main
    Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
2024-12-16 15:58:06.042 5523-25412/? W/MediaProvider: Forgot to handle a top level directory in getContentUriForFile?
2024-12-16 15:58:06.043 5523-25412/? E/MediaProvider: insertFileIfNecessary failed
    java.lang.IllegalArgumentException: Primary directory BuyupSpecialLine not allowed for content://media/external_primary/file; allowed directories are [Download, Documents]
        at com.android.providers.media.MediaProvider.ensureFileColumns(MediaProvider.java:3953)
        at com.android.providers.media.MediaProvider.ensureUniqueFileColumns(MediaProvider.java:3591)
        at com.android.providers.media.MediaProvider.insertFile(MediaProvider.java:4363)
        at com.android.providers.media.MediaProvider.insertInternal(MediaProvider.java:4949)
        at com.android.providers.media.MediaProvider.insert(MediaProvider.java:4649)
        at com.android.providers.media.MediaProvider.insertFileForFuse(MediaProvider.java:9218)
        at com.android.providers.media.MediaProvider.insertFileIfNecessaryForFuse(MediaProvider.java:9313)

这个奔溃的原因是：没有注册文件提供器

解决办法：新建一个MyFileProvider继承 FileProvider

public class MyFileProvider extends FileProvider{

}

然后在Manifest注册

<provider
            android:name="com.domain.app.VersionFileProvider"
            android:authorities="com.domain.app.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

之后新建一个file_paths的xml文件，内容如下，放入xml资源目录

<?xml version="1.0" encoding="utf-8"?>
<paths>
        <external-path
            name="external_files"
            path="." />
        <root-path
            name="root_path"
            path="." />
</paths>