Question

I use the following code to check if a file exists in a folder in sdcard:

//Check if database exists
    File fia = new File(Environment.getExternalStorageDirectory()+"/my_folder/db/my_file_1");
    if(fia.exists())
       {                        
         //do something 
       }                        
   else
    {                       
       Toast.makeText(getApplicationContext(), "Database is not available. Please install it.", Toast.LENGTH_LONG).show();                      
    } 

This code works well.

Now I have 5 known files stored in different subfolders of sdcard/my_folder/ as:

1. sdcard/my_folder/db/my_file_1 
2. sdcard/my_folder/db/my_file_2
3. sdcard/my_folder/abc/my_file_3
4. sdcard/my_folder/abc/my_file_3
5. sdcard/my_folder/xyz/my_file_5

The problem is that I want to check if all the files exist, then do something. And if any of the above files is not available or missing, then display a Toast message.

I have no idea how to display the Toast message just one time if any of the files does not exist (manually doing this displays the Toast message whenever a file is not available, which is not my wish).

Can you please give a little help? Many thanks.

Answer 1

File fia = new File(Environment.getExternalStorageDirectory()+"/my_folder/db/my_file_1");
File fia2 = new File(Environment.getExternalStorageDirectory()+"/my_folder/db/my_file_2");
File fia3 = new File(Environment.getExternalStorageDirectory()+"/my_folder/abc/my_file_3");
File fia4 = new File(Environment.getExternalStorageDirectory()+"/my_folder/abc/my_file_3");
File fia5 = new File(Environment.getExternalStorageDirectory()+"/my_folder/xyz/my_file_5");
if(fia.exists() && fia2.exists() && fia3.exists() && fia4.exists() && fia5.exists())
   {                        
     //do something 
   } else {                       
   Toast.makeText(getApplicationContext(), "Database is not available. Please install it.", Toast.LENGTH_LONG).show();                      
}