Включить следующий класс в ваш проект
public class FontManager {
private static FontManager sInstance;
private HashMap<String, Typeface> mFontCache = new HashMap<>(); // <path to the font file in the assets folder, cached Typeface>
/**
* Gets the FontManager singleton
*
* @return the FontManager singleton
*/
public static FontManager getInstance() {
if (sInstance == null) {
sInstance = new FontManager();
}
return sInstance;
}
/**
* Gets a Typeface from the cache. If the Typeface does not exist, creates it, cache it and returns it.
*
* @param context a Context
* @param path Path to the font file in the assets folder. ie "fonts/MyCustomFont.ttf"
* @return the corresponding Typeface (font)
* @throws RuntimeException if the font asset is not found
*/
public Typeface getTypeface(Context context, String path) throws RuntimeException {
Typeface typeface = mFontCache.get(path);
if (typeface == null) {
try {
typeface = Typeface.createFromAsset(context.getAssets(), "fonts/" +path);
} catch (RuntimeException exception) {
String message = "Font assets/" + path + " cannot be loaded";
throw new RuntimeException(message);
}
mFontCache.put(path, typeface);
}
return typeface;
}
/**
* Gets a Typeface from the cache. If the Typeface does not exist, creates it, cache it and returns it.
*
* @param context a Context
* @param pathResId String resource id for the path to the font file in the assets folder. ie "fonts/MyCustomFont.ttf"
* @return the corresponding Typeface (font)
* @throws RuntimeException if the resource or the font asset is not found
*/
public Typeface getTypeface(Context context, int pathResId) throws RuntimeException {
try {
String path = context.getResources().getString(pathResId);
return getTypeface(context, path);
} catch (Resources.NotFoundException exception) {
String message = "String resource id " + pathResId + " not found";
throw new RuntimeException(message);
}
}
/**
* Applies a font to a TextView that uses the "fontPath" attribute.
*
* @param textView TextView when the font should apply
* @param attrs Attributes that contain the "fontPath" attribute with the path to the font file in the assets folder
*/
public void applyFont(TextView textView, AttributeSet attrs) {
if (attrs != null) {
Context context = textView.getContext();
TypedArray styledAttributes = context.getTheme().obtainStyledAttributes(attrs, R.styleable.customTextView, 0, 0);
String fontPath = styledAttributes.getString(R.styleable.customTextView_fontFamily);
if (!TextUtils.isEmpty(fontPath)) {
Typeface typeface = getTypeface(context, fontPath);
if (typeface != null) {
textView.setTypeface(typeface);
}
}
styledAttributes.recycle();
}
}
}
Добавить атрибуты в Res> Значения> Файл атрибутов
<declare-styleable name="customTextView">
<attr name="fontFamily" format="string" />
</declare-styleable>
Создайте виджет, для которого вы хотите изменить шрифты: скажем, CustomTextView
public class CustomTextView extends AppCompatButton {
public CustomTextView(Context context, AttributeSet attrs) {
super(context, attrs);
applyDefaultFont(context);
FontManager.getInstance().applyFont(this, attrs);
}
private void applyDefaultFont(Context context) {
Typeface typeface = FontManager.getInstance().getTypeface(context, context.getString(R.string.font_regular));
if (typeface != null) {
this.setTypeface(typeface);
}
}
}
XML-файл Код:
<com.yourpackage.CustomButton
android:id="@+id/btnSubmit"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:layout_marginTop="@dimen/_16sdp"
android:background="@drawable/shape_button_green"
android:text="@string/submit"
android:textAllCaps="true"
android:textColor="@color/white"
android:textSize="@dimen/font_button"
app:fontFamily="@string/font_bold" />
Примечание. Если вы копируете полный код, требуемый шрифт должен находиться в папке assets> fonts.
Определить строку для имени нужного шрифта, например:
<string name="font_regular">SF-Pro-Text-Regular.otf</string>
<string name="font_bold">SF-Pro-Text-Bold.otf</string>