View All Files in a Directory on Android

I was having a terrible time trying to figure out how to list all the files in a folder on Android. I know how to easily do it in C#, but java-Android is making life difficult. Finally I figured it out. The seemingly trivial was made difficult by vague exception messages.

The key is that the file you run listfile() on must be a directory. This was not clear from all the examples I found on other websites.

	Log.d(TAG, "making the file f ");
	File fileList = new File(context.getFilesDir(), filename);
	fileList = fileList.getParentFile(); // get the directory, we must have a directory before calling listFiles()
	String absPath = fileList.getAbsolutePath();
	Log.d(TAG,"this is the file path "+absPath);
	if (fileList != null){
	Log.d(TAG, "getting all the files in the same directory ");
	File[] filenames = fileList.listFiles();
	if(filenames != null){
	Log.d(TAG, "looping. ");
	for (File tmpf : filenames){
	//Do something with the files
	Log.d(TAG, "FileName:" + tmpf.getName());
	}
	} else {
	Log.d(TAG,"File names is null");
	}
	}

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