Different languages in Android without resource files

Question

I have a question regarding mutiple languages for Android Apps. I know it is common pratice to use resource files for your strings (Android Studio always reminds you of this if you have forgotten). However, I am wondering how to do this for the following two elements:

1. Pictures that have different language contents
2. String variables within a class that are not explicitly defined in the XML layout file

How would you handle these issues? I'd appreciate every comment.

Update: Here is an example of a String variable that I use in the code (but not in a XML-Layout file). It is the string 'Comment' in an AlertDialog:

  AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("Comment");

        // Set up the input
            final EditText input = new EditText(this);
        // Specify the type of input expected; this, for example, sets the input as a password, and will mask the text
            input.setInputType( InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_NORMAL);
            input.setSingleLine(false);
            input.setLines(3);
            input.setText(comment_Text);
            builder.setView(input);


        // Set up the buttons
            builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    comment_Text = input.getText().toString();
                }
            });
            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });

            builder.show();

Answer 1

You can localize your drawables as well.

You can do this by creating a folder for a specific language, the same way as you would localize the string resources.

Example of a drawable for the default locale:

res/drawable-hdpi/country_flag.png

Example of a drawable for a different locale (es_ES)

res/drawable-es-rES-hdpi/country_flag.png

For more information please check out the official documentation: https://developer.android.com/training/basics/supporting-devices/languages

Concerning you second question; your classes should also make use of the string resources, don't use hardcoded strings.

An example of how to do this:

In this case the string resource file would contain:

<string name="title_comment">Comment</string>
<string name="button_ok">OK</string>
<string name="button_cancel">Cancel</string>

The code for your AlertDialog would then look like this:

 AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle(R.string.title_comment);

            final EditText input = new EditText(this);

            input.setInputType( InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_NORMAL);
            input.setSingleLine(false);
            input.setLines(3);
            input.setText(comment_Text);
            builder.setView(input);

            builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    comment_Text = input.getText().toString();
                }
            });

            builder.setNegativeButton(R.string.button_cancel, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });

            builder.show();