Saving Data on Android

Adding permissions in the manifest
To use external storage, you must first add the correct permission to the manifest. If 
you wish to only 
read
 external files, use the 
READ_EXTERNAL_FILE
 permission.
<
uses-permission
  
  
android:name
=
"android.permission.READ_EXTERNAL_STORAGE"
 />
If you want to both 
read and write
, use the 
WRITE_EXTERNAL_STORAGE
 
permission.
<
uses-permission
  
  
android:name
=
"android.permission.WRITE_EXTERNAL_STORAGE"
 />
Beginning with API level 19, reading or writing files in your app’s 
private
 external 
storage directory does not require the above permissions. If your app supports 
Android API level 18 or lower, and you’re saving data to the private external 
directory only, you should declare that the permission is requested only on the lower 
versions of Android by adding the 
maxSdkVersion
 attribute:
<
uses-permission
  
  
android:name
=
"android.permission.WRITE_EXTERNAL_STORAGE"
 
  
android:maxSdkVersion
=
"18"
 />
In this app, you’ll be reading and writing to the external storage, so add the