如何将文件存储在内置的外部存储中

Question

I had created a mdatabase.db file on the sdcard in a directory named MyDataBase, this is fine, when i open the sdcard via phone the dir and files are showing, but when i connected the device to system and open via system the created files are not showing. Help me please

This problem is arriving only in inbuilt sdcard devices for me

DataBasepath mnt/sdcard/MyDataBase/mdatabase.db

Answer 1

use this code to Checking media availability

boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {
    // We can read and write the media
    mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
    // We can only read the media
    mExternalStorageAvailable = true;
    mExternalStorageWriteable = false;
} else {
    // Something else is wrong. It may be one of many other states, but all we need
    //  to know is we can neither read nor write
    mExternalStorageAvailable = mExternalStorageWriteable = false;
}

do your code depend on that

for more detail