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POIt can't access the sdcard after setting "android.uid.system" in my application?
 

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    <p>This is a strange problem. My Application can access the sdcard successfully if I don't set <code>android.uid.system</code> to it. But after setting <code>android.uid.system</code> to it, my application can't access the sdcard. At this time, the exception take place:<code>07-13 09:11:24.999: INFO/System.out(9986): create file happen exception---&gt;java.io.IOException: Permission denied</code>. I check I write the right permission in the right place:</p> <pre><code>&lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt; &lt;uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /&gt;. </code></pre> <p>Because use <code>forceStopPackage</code> in my application, I need to add <code>android.uid.system</code> to the manifest. And I have written <code>LOCAL_CERTIFICATE := platform</code> in the make file. Who can explain this strange problem. After setting <code>android.uid.system</code>, my application is belong the system process which should have more power to access the sdcard. This is my idea. The following are my code:</p> <pre><code>public void setPackage(String dir){ System.out.println( "setPackage dir=="+dir ); File share=new File("/mnt/sdcard","test.txt"); if(!share.exists()){ try{ share.createNewFile(); }catch(Exception e){ System.out.println( "creat file happen exception---&gt;" +e.toString() ); } } try{ if(share!=null){ System.out.println( "create file is not null" ); FileOutputStream fops=new FileOutputStream(share); fops.write(dir.getBytes()); fops.flush(); fops.close(); } }catch(Exception e){ System.out.println( "write Exception--&gt;" +e.toString() ); } } </code></pre> <p>And My application run at the emulator and his target version is 2.3. Thank you very much.</p>
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