Databases
StackOverflow2013
Postsdbo
POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
    primarykey
    data
    text
    <p>I'm writing a testing program and I want to serialize some of my test result to a file. I keep on getting this annoying permission denied exception. To make things easier, I write a small sample code and still get the same permission denied warning. Here is my code, I use getExternalStorageDirectory to get the /mnt/sdcard/ directory:</p> <pre><code>private void writetry(){ try { File sdCard = Environment.getExternalStorageDirectory(); Log.d("can write", String.valueOf(sdCard.canWrite())); Log.d("ExternalStorageState", Environment.getExternalStorageState()); File file = new File(sdCard, "VisitedScreen.temp"); //file.createNewFile(); FileOutputStream f = new FileOutputStream(file); byte[] buf = "Hello".getBytes(); f.write(buf); f.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } </code></pre> <p>And here is what logcat print out:</p> <pre><code>07-12 12:28:47.288: D/can write(253): false 07-12 12:28:47.288: D/ExternalStorageState(253): mounted 07-12 12:28:47.297: W/System.err(253): java.io.FileNotFoundException: /sdcard/VisitedScreen.temp 07-12 12:28:47.437: W/System.err(253): at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:244) 07-12 12:28:47.437: W/System.err(253): at java.io.FileOutputStream.&lt;init&gt;(FileOutputStream.java:97) 07-12 12:28:47.437: W/System.err(253): at java.io.FileOutputStream.&lt;init&gt;(FileOutputStream.java:69) </code></pre> <p>I declared my Junit testing Manifest file as: (Actually it's the wrong place to set the permission)</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="net.mandaria.tippytipper.test" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="7" android:targetSdkVersion="7" /&gt; &lt;instrumentation android:name="android.test.InstrumentationTestRunner" android:targetPackage="net.mandaria.tippytipper" /&gt; &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" &gt; &lt;uses-library android:name="android.test.runner" /&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>Any suggestion is appreciated!</p> <p>Added: I copy the same code to a normal android program, it works, and the sdCard.canWrite() return true. But in Android Junit testing project it's not working. Anyone knows why??</p> <p>Problem solved: Thanks for all those of you have replied. It's because I haven't add the in original Android program. I also noted that I don't need to add any permission to Junit test project. It's very interesting that the write action happened in the testing project, but permission is required in the original project. I'm wondering what if I'm doing black box testing against an .apk file. I can't change the permission from the byte code right?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USWei Yang
    1. USWei Yang
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
      1. USAshraful Islam
      1. VTFavorite
    1. COThe reason is at a glance, the SD card is in read-only state. Look at it again. Why is 'D/can write' showing `false`, and then immediately after that, 'D/ExternalStorageState` says 'mounted'?
      singulars
      1. POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
      1. USt0mm13b
    2. COAre you mounting the storage when the app is running within the emulator?
      singulars
      1. POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
      1. USt0mm13b
    3. COOP: Can you re-edit your question to explicitly state whether that manifest is part of the testing project or the main project?... see @Devunwired's comment below DtMilano's answer.. :)
      singulars
      1. POAndroid Testing: The storage state is mounted, the WRITE_EXTERNAL_STORAGE permission has been declared, but still can't write to emulator's sdcard
      1. USt0mm13b
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload