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You can below condition to check whether SDCard is available or not
http://www.androiddeft.com/android-storing-and-accessing-file-from-external-storage-tutorial/
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)) {
//Check for the file
File appFolder = new File(Environment.getExternalStorageDirectory() + File.separator
+ context.getString(R.string.app_name));
boolean exist = appFolder.exists();
}
http://www.androiddeft.com/android-storing-and-accessing-file-from-external-storage-tutorial/
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