Develop Reference

Android download manager copy file from cache

How to copy a file downloaded by download manager in internal storage's cache folder. I am using fileInputStream, but it through's permison denied. Is there any option to copy file

it has been a while since the question was asked but anyway, I found the answer this morning:
You simply can't copy files from you Caches folder. What you can do is to create your file in another folder (Files folder for example, which you get by doing getFilesDir()) and delete it if necessary !
Hope it helps,
Bye

Set permission in AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER" />

Android : open failed eacces permission denied

i am new to android. i have tried this code
in manifest file i wrote this
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
in java code
File sdcard = Environment.getExternalStorageDirectory();
//Get the text file
File file = new File(sdcard,"store.txt");
but i am getting above exception
i want to perform file read and write operations and i am using version 4.4.2.
i am getting this error
06-14 02:19:44.491: D/Shopping Cart(1700): open failed: EACCES (Permission denied)

Under kitkat your app can only write to an app specific directory on the -removable- sd card. You get possible directories using getExternalFilesDirs().

Is your permission is right place in manifest file as
<application>
...
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
</manifest>
Edit
Try to edit the Emulator
go to android virtual device manager and then edit the emulator
set say 100 MB for Sd card for the respected emulator and say Ok
save and close emulator and start
path saved in DDMS is mnt/sdcard/yourfilename
it worked for me the app is not giving Error and is working
Please see more at this link Cannot Write to sdcard in Android emulator
and this link Guide to Emulating an SD Card Using the Google Android Emulator

SynthesisToFile not Working

I'm using synthesis To file to write in external storage .but i found exception on file not found error.i'm unable to read file from the sdcard. How to store in external device?

Please declare this permission in your manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Couldn't find Application Package Name in Android device

So I make an Android app with package name com.xxx.xxx. I know that any installed app will create a folder in Android/Data/com.xxx.xxx. But my case is I can't find my application package name in that directory after I install it. Am I missing something?
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ceria.tuntun"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>

Installed app wont necessary create a folder in Android/Data. There only the cache files are stored of your app, and that too if you have programmed your app to do so. By default the apps are stored in Internal memory in /data/data which can be accessed only if u have a rooted phone and a file browser for root users.

Which device r u using? You cannot see the application package in most of the devices because those do not have access to the internal storage if the app is installed in phone memory. You can access only SDCard.

the app is installed into the phone memory and not the SD Card by default. only the SD card files can be seen in an unrooted phone.
To install to SD card add this code to the manifest file.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:installLocation="preferExternal"
... >

Rhomobile how to edit the Android Manifest

I am having difficulty changing the AndroidManifest.xml file.
"C:\RhoStudio\ruby\lib\ruby\gems\1.8\gems\rhodes-3.2.2\platform\android\Rhodes\AndroidManifest.xml"
I am trying to add the following to the manifest for the build to allow me to save files to the SD card:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
I add it but then when I build, the line does not appear in the AndroidManifest.xml that is outputted into the bin/tmp folder.

android:
capabilities:
- sdcard
Adding the following to the build.yml adds the above the AndroidManifest.xml and allows me to read/write to the SDcard.