我希望能够让用户选择将文件复制到Android设备的数据目录以及外部区域。请问我需要在清单文件中添加什么内容才能让我的应用程序将文件复制到内部区域呢?我计划将文件存储在 /data/data/your.app.package.name/myFiles 中。在代码中,File.DirInternal 将转换为该位置。如果我使用 File.DirRootExternal,则会进入 /mnt/sdcard,这不会导致应用程序崩溃。这就是我认为清单文件引起问题的原因。如果我使用 File.DirInternal,则会在此行崩溃:
mpTheMediaPlayer.Load(File.DirInternal, "114.mp3")
导致程序崩溃的代码如下:
' Http sub routines.
'-------------------
Sub JobDone(Job As String)
Select Job
Case "Job1"
If HttpUtils.IsSuccess(mp3Url) Then
Dim blnFolderMade As Boolean
mp3 = HttpUtils.GetInputStream(mp3Url)
timer1.Enabled = True
Dim out As OutputStream
out = File.OpenOutput(File.DirInternal,"114.mp3",False)
File.Copy2(mp3, out)
out.Close
ProgressBarDownloading.Visible = False
ToggleButtonPlayPause.Checked = True
ToggleButtonPlayPause.Enabled = True
blnCurrentPauseCheckedState = True
blnCurrentPauseEnabledState = True
mpTheMediaPlayer.Release
mpTheMediaPlayer.Initialize2("")
mpTheMediaPlayer.Load(File.DirInternal, "114.mp3")
mpTheMediaPlayer.Play
End If
End Select
End Sub
这是来自日志的错误信息:
Starting Job: Job1
** Service (httputilsservice) Create **
** Service (httputilsservice) Start **
main_jobdone (java line: 518)
java.io.IOException: Prepare failed.: status=0x1
at android.media.MediaPlayer.prepare(Native Method)
at anywheresoftware.b4a.objects.MediaPlayerWrapper.Load(MediaPlayerWrapper.java:79)
at quran.repeater.main._jobdone(main.java:518)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:113)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:97)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:772)
at anywheresoftware.b4a.keywords.Common.CallSub2(Common.java:759)
at quran.repeater.httputilsservice._processnexttask(httputilsservice.java:180)
at quran.repeater.httputilsservice._response_streamfinish(httputilsservice.java:244)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:113)
at anywheresoftware.b4a.BA$1.run(BA.java:218)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3647)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
java.io.IOException: Prepare failed.: status=0x1