java - Android install apk error on Android N -


question:i failure when try install apks on android n. part error info.

java.lang.nullpointerexception: attempt invoke virtual method 'android.content.res.xmlresourceparser android.content.pm.providerinfo.loadxmlmetadata(android.content.pm.packagemanager, java.lang.string)' on null object reference @ android.support.v4.content.fileprovider.parsepathstrategy(fileprovider.java:583) @ android.support.v4.content.fileprovider.getpathstrategy(fileprovider.java:557) at
android.support.v4.content.fileprovider.geturiforfile(fileprovider.java:399) @ me.hades.androidsafer.utils.systemutils.installapk(systemutils.java:59) @ me.hades.androidsafer.utils.systemutils.installapk(systemutils.java:51) @ me.hades.androidsafer.activity.splashactivity$2.completed(splashactivity.java:154) @ com.liulishuo.filedownloader.filedownloadmessenger.handovermessage(filedownloadmessenger.java:341) @ com.liulishuo.filedownloader.filedownloadmessagestation$uihandlercallback.dispose(filedownloadmessagestation.java:169) @ com.liulishuo.filedownloader.filedownloadmessagestation$uihandlercallback.handlemessage(filedownloadmessagestation.java:160) @ android.os.handler.dispatchmessage(handler.java:98) @ android.os.looper.loop(looper.java:154) @ android.app.activitythread.main(activitythread.java:6077) @ java.lang.reflect.method.invoke(native method) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:865) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:755)

this part manifest.xml

<provider             android:name="android.support.v4.content.fileprovider"             android:authorities="me.hades.androidsafer.fileprovider"             android:exported="false"             android:granturipermissions="true">              <meta-data                 android:name="android.support.file_provider_paths"                 android:resource="@xml/file_paths"/>      </provider>

this part @xml/file_paths.xml

<?xml version="1.0" encoding="utf-8"?> <paths>      <external-path path="download/" name="download" />     <external-files-path name="download" path="download/" /> </paths>

installapk() function:

public static void installapk(context context,file file) {         intent intent = new intent(intent.action_view);          if (build.version.sdk_int >= build.version_codes.n) {             intent.setflags(intent.flag_grant_read_uri_permission);             uri contenturi = fileprovider.geturiforfile(context, buildconfig.application_id + ".fileprovider", file);             intent.setdataandtype(contenturi, "application/vnd.android.package-archive");         } else {             intent.setdataandtype(uri.fromfile(file), "application/vnd.android.package-archive");             intent.setflags(intent.flag_activity_new_task);         }         context.startactivity(intent);     }

how fix error? english not well. thinks

check question might shall helpful you. problem in file provider.


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