android - Directory does and doesn't exist -

i trying write file sd card on android phone, seems having issues directory. exists doesnt exist. mean when go file browser on android phone, , gpstracker folder cannot find it. yet in program seems acknowledge directory exists when checks dir.exists() if condition below. when gets canwrite() function returns false. have no idea wrong @ point, have debugging ideas? thanks.

boolean mexternalstorageavailable = false; boolean mexternalstoragewriteable = false; string state = environment.getexternalstoragestate();  if (environment.media_mounted.equals(state)) {     // can read , write media     mexternalstorageavailable = mexternalstoragewriteable = true; } else if (environment.media_mounted_read_only.equals(state)) {     // can read media     mexternalstorageavailable = true;     mexternalstoragewriteable = false; } else {     // else wrong. may 1 of many other states, need     //  know can neither read nor write     mexternalstorageavailable = mexternalstoragewriteable = false; } 

^ these both return true now, got issue fixed.

manifest:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.tinywebteam.gpstracker"     android:versioncode="1"     android:versionname="1.0" >      <uses-permission android:name="android.permission.access_coarse_location" />     <uses-permission android:name="android.permission.internet" />     <uses-permission android:name="android.permission.read_external_storage" />     <uses-permission android:name="android.permission.write_external_storage"/>     <uses-sdk         android:minsdkversion="8"         android:targetsdkversion="17" />      <application         android:allowbackup="true"         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <activity             android:name="com.tinywebteam.gpstracker.mainactivity"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>     </application>  </manifest> 

code:

try {             file sdcard = environment.getexternalstoragedirectory();             file dir = new file(sdcard + "/gpstracker/data");             if (!dir.exists()) {                 if (!dir.mkdirs())                     throw new filenotfoundexception("couldn't make directory.");                 if (!dir.isdirectory())                     throw new filenotfoundexception("couldn't verify directory.");             }             file fileout = new file(dir, "gpstracker_" + ts + ".csv");             if (fileout.canwrite()) {                 fileoutputstream out = new fileoutputstream(fileout);                 out.write(filestr.getbytes());                 out.close();                 system.out.println("file written successfully");             } else {                 system.out.println("could not write file");             }         } catch (filenotfoundexception e) {             e.printstacktrace();         } catch (ioexception e) {             e.printstacktrace();         }