Concatenate multiple strings in XML?

Question

I go through this How to concatenate multiple strings in android XML? and in the end there are comments that

For clarity, Its works:

&

Answer 1

How about this technique

Use an array

<string name="app_link">https://myapp.com/</string>

<array name="update_dialog_msg">
    <item>Update can be downloaded manually by visiting this link:\n</item>
    <item>@string/app_link</item>
</array>

And then make a method in java class as below

public String getStringArray(int resStringArray)
{
    String str = "";

    String[] strArray = mContext.getResources().getStringArray(resStringArray);
    for (String s: strArray)
    {
        str += s;
    }

    return str;
}

Now call it from any java class as

mDialog.setMessage(getStringArray(R.array.update_dialog_msg);
// OR
textView.setText(getStringArray(R.array.update_dialog_msg);

Answer 2

Yes, here is a complete way of doing this. Use data binding.

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
                    android:id="@+id/tv_one_month_price"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="16dp"
                    android:text="@{@string/string1 + @string/string2}"
                    />
</layout>

Here you can simply define your strings in strings.xml file.

<string name="string1">string1 text</string>
<string name="string2">string2 text</string>

Obviously you have to enable data binding, here is the link for the same. https://developer.android.com/topic/libraries/data-binding/start

Answer 3

You can concatenate the resources in gradle.build:

    resValue "string", "TWITTER_CALLBACK", "twitter_callback_" + applicationId

Answer 4

No I don't think you can concatenate.

<string name="aaa">aaa</string>
<string name="bbb">bbb @string/aaa</string>

Output - bbb @string/aaa

If you do,

<string name="aaa">aaa</string>
<string name="bbb">@string/aaa bbb</string>  -> This won't work it
                                                      will give compilation error

Because here it will search for a String with reference @string/aaa bbb which does not exists.

Problem in your case was, you where using @strings/aaa which should be @string/aaa

Answer 5

Yes, you can do it if your XML files are using DataBinding as you can see in this link

Use it like this:

"@{@string/first_string+ @string/second_string}"

Answer 6

In XML only this is not possible but using the java code you can use the String.format() method.

<string name="aaa">aaa</string>
<string name="bbb">bbb %1$s</string>

In java code

String format = res.getString(R.string.bbb);
String title = String.format(format, res.getString(R.string.aaa));

So title will be a full string after concatenation of two strings.