如何刷新 SD 卡？

Question

我正在尝试刷新 SDCard。为此，我正在使用

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,
                Uri.parse("file://" + Environment.getExternalStorageDirectory())));

但它给出了错误。这是我的日志。

02-11 04:19:11.060: E/AndroidRuntime(5093): FATAL EXCEPTION: main
02-11 04:19:11.060: E/AndroidRuntime(5093): java.lang.RuntimeException: Unable to start activity ComponentInfo{amiTechnologies.products.amidesignerforvideo/amiTechnologies.products.amidesignerforvideo.AMIDesignerForVideoActivity}: java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=5093, uid=10156
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.os.Handler.dispatchMessage(Handler.java:102)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.os.Looper.loop(Looper.java:136)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread.main(ActivityThread.java:5017)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at java.lang.reflect.Method.invokeNative(Native Method)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at java.lang.reflect.Method.invoke(Method.java:515)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at dalvik.system.NativeStart.main(Native Method)
02-11 04:19:11.060: E/AndroidRuntime(5093): Caused by: java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=5093, uid=10156
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.os.Parcel.readException(Parcel.java:1465)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.os.Parcel.readException(Parcel.java:1419)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityManagerProxy.broadcastIntent(ActivityManagerNative.java:2373)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ContextImpl.sendBroadcast(ContextImpl.java:1127)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.content.ContextWrapper.sendBroadcast(ContextWrapper.java:365)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at amiTechnologies.products.amidesignerforvideo.AMIDesignerForVideoActivity.onCreate(AMIDesignerForVideoActivity.java:329)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.Activity.performCreate(Activity.java:5231)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
02-11 04:19:11.060: E/AndroidRuntime(5093):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
02-11 04:19:11.060: E/AndroidRuntime(5093):     ... 11 more

我必须添加什么权限？我尝试了堆栈溢出的许多答案，但对我不起作用。

Answer 1

当您使用代码时

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,
                Uri.parse("file://" + Environment.getExternalStorageDirectory())));

看起来不错，但是设备必须从 USB 断开，不应该连接。否则，您可能需要重新插拔设备才能看到您尝试进行的所有更改。

你有没有看到上面写着的日志

java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED

请在使用以下代码 sn-p 时断开设备

也请访问I try scan media file in sdcard and refresh it，这可能会对您有所帮助。