本文介绍了Android的：运行时错误“无法创建目录”，对使用类下载管理器中，方法setDestinationInExternalPublicDir的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我得到这个异常：
10-24 17:08:19.711: E/AndroidRuntime(1379): FATAL EXCEPTION: main
10-24 17:08:19.711: E/AndroidRuntime(1379): java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.campusfqm.cfqm/br.com.campusfqm.cfqm.DownloadManagerActivity}: java.lang.IllegalStateException: Unable to create directory: /mnt/sdcard/Download
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1736)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1752)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread.access$1500(ActivityThread.java:123)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:993)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.os.Handler.dispatchMessage(Handler.java:99)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.os.Looper.loop(Looper.java:126)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread.main(ActivityThread.java:3997)
10-24 17:08:19.711: E/AndroidRuntime(1379): at java.lang.reflect.Method.invokeNative(Native Method)
10-24 17:08:19.711: E/AndroidRuntime(1379): at java.lang.reflect.Method.invoke(Method.java:491)
10-24 17:08:19.711: E/AndroidRuntime(1379): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
10-24 17:08:19.711: E/AndroidRuntime(1379): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
10-24 17:08:19.711: E/AndroidRuntime(1379): at dalvik.system.NativeStart.main(Native Method)
10-24 17:08:19.711: E/AndroidRuntime(1379): Caused by: java.lang.IllegalStateException: Unable to create directory: /mnt/sdcard/Download
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.DownloadManager$Request.setDestinationInExternalPublicDir(DownloadManager.java:466)
10-24 17:08:19.711: E/AndroidRuntime(1379): at br.com.campusfqm.cfqm.DownloadManagerActivity.download(DownloadManagerActivity.java:51)
10-24 17:08:19.711: E/AndroidRuntime(1379): at br.com.campusfqm.cfqm.DownloadManagerActivity.onCreate(DownloadManagerActivity.java:43)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
10-24 17:08:19.711: E/AndroidRuntime(1379): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1700)
10-24 17:08:19.711: E/AndroidRuntime(1379): ... 11 more
使用类下载管理器，这个code：
Using the class DownloadManager, with this code:
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("http://centraldemangas.com.br/forum/dbtech/vbshop/images/gifts/pidgey.gif"));
request.setAllowedNetworkTypes(Request.NETWORK_MOBILE | Request.NETWORK_WIFI);
request.setAllowedOverRoaming(false);
request.setTitle("pidgey.gif");
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,"pid.gif");
id = downloadManager.enqueue(request);
例外指向<$c$c>request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,"pid.gif");
推荐答案
现在的问题是在
无法创建目录：/ MNT / SD卡/下载
试试这个：
String name = Environment.getExternalStorageDirectory().getAbsolutePath();
name += "/YourDirectoryName/" ;
这篇关于Android的：运行时错误“无法创建目录”，对使用类下载管理器中，方法setDestinationInExternalPublicDir的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！