如何改变字体在TextView,默认它显示为Arial?怎么改成Helvetica字体?
当前回答
你可能想要创建一个包含所有字体的静态类。这样,您就不会多次创建字体,这可能会严重影响性能。 只要确保你在“assets”文件夹下创建了一个名为“fonts”的子文件夹。
你可以这样做:
public class CustomFontsLoader {
public static final int FONT_NAME_1 = 0;
public static final int FONT_NAME_2 = 1;
public static final int FONT_NAME_3 = 2;
private static final int NUM_OF_CUSTOM_FONTS = 3;
private static boolean fontsLoaded = false;
private static Typeface[] fonts = new Typeface[3];
private static String[] fontPath = {
"fonts/FONT_NAME_1.ttf",
"fonts/FONT_NAME_2.ttf",
"fonts/FONT_NAME_3.ttf"
};
/**
* Returns a loaded custom font based on it's identifier.
*
* @param context - the current context
* @param fontIdentifier = the identifier of the requested font
*
* @return Typeface object of the requested font.
*/
public static Typeface getTypeface(Context context, int fontIdentifier) {
if (!fontsLoaded) {
loadFonts(context);
}
return fonts[fontIdentifier];
}
private static void loadFonts(Context context) {
for (int i = 0; i < NUM_OF_CUSTOM_FONTS; i++) {
fonts[i] = Typeface.createFromAsset(context.getAssets(), fontPath[i]);
}
fontsLoaded = true;
}
}
通过这种方式,您可以从应用程序中的任何地方获取字体。
其他回答
首先下载所需字体的.ttf文件(arial.ttf)。把它放在资产文件夹中。(在assets文件夹内创建名为fonts的新文件夹,并将其放置在其中。)使用以下代码应用字体到你的TextView:
Typeface type = Typeface.createFromAsset(getAssets(),"fonts/arial.ttf");
textView.setTypeface(type);
我终于找到了一个非常简单的解决方法。
use these Support libraries in app level gradle, compile 'com.android.support:appcompat-v7:26.0.2' compile 'com.android.support:support-v4:26.0.2' then create a directory named "font" inside the res folder put fonts(ttf) files in that font directory, keep in mind the naming conventions [e.g.name should not contain any special character, any uppercase character and any space or tab] After that, reference that font from xml like this <Button android:id="@+id/btn_choose_employee" android:layout_width="140dp" android:layout_height="40dp" android:layout_centerInParent="true" android:background="@drawable/rounded_red_btn" android:onClick="btnEmployeeClickedAction" android:text="@string/searching_jobs" android:textAllCaps="false" android:textColor="@color/white" android:fontFamily="@font/times_new_roman_test" />
在本例中,times_new_roman_test是该字体目录中的字体ttf文件
它有点老,但我改进了类CustomFontLoader一点点,我想分享它,所以它可以很有帮助。只需用这段代码创建一个新类。
import android.content.Context;
import android.graphics.Typeface;
public enum FontLoader {
ARIAL("arial"),
TIMES("times"),
VERDANA("verdana"),
TREBUCHET("trbuchet"),
GEORGIA("georgia"),
GENEVA("geneva"),
SANS("sans"),
COURIER("courier"),
TAHOMA("tahoma"),
LUCIDA("lucida");
private final String name;
private Typeface typeFace;
private FontLoader(final String name) {
this.name = name;
typeFace=null;
}
public static Typeface getTypeFace(Context context,String name){
try {
FontLoader item=FontLoader.valueOf(name.toUpperCase(Locale.getDefault()));
if(item.typeFace==null){
item.typeFace=Typeface.createFromAsset(context.getAssets(), "fonts/"+item.name+".ttf");
}
return item.typeFace;
} catch (Exception e) {
return null;
}
}
public static Typeface getTypeFace(Context context,int id){
FontLoader myArray[]= FontLoader.values();
if(!(id<myArray.length)){
return null;
}
try {
if(myArray[id].typeFace==null){
myArray[id].typeFace=Typeface.createFromAsset(context.getAssets(), "fonts/"+myArray[id].name+".ttf");
}
return myArray[id].typeFace;
}catch (Exception e) {
return null;
}
}
public static Typeface getTypeFaceByName(Context context,String name){
for(FontLoader item: FontLoader.values()){
if(name.equalsIgnoreCase(item.name)){
if(item.typeFace==null){
try{
item.typeFace=Typeface.createFromAsset(context.getAssets(), "fonts/"+item.name+".ttf");
}catch (Exception e) {
return null;
}
}
return item.typeFace;
}
}
return null;
}
public static void loadAllFonts(Context context){
for(FontLoader item: FontLoader.values()){
if(item.typeFace==null){
try{
item.typeFace=Typeface.createFromAsset(context.getAssets(), "fonts/"+item.name+".ttf");
}catch (Exception e) {
item.typeFace=null;
}
}
}
}
}
然后使用这段代码在你的textview:
Typeface typeFace=FontLoader.getTypeFace(context,"arial");
if(typeFace!=null) myTextView.setTypeface(typeFace);
添加类FontTextView.java:
public class FontTextView extends TextView {
String fonts[] = {"HelveticaNeue.ttf", "HelveticaNeueLight.ttf", "motschcc.ttf", "symbol.ttf"};
public FontTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs);
}
public FontTextView(Context context, AttributeSet attrs) {
super(context, attrs);
if (!isInEditMode()) {
init(attrs);
}
}
public FontTextView(Context context) {
super(context);
if (!isInEditMode()) {
init(null);
}
}
private void init(AttributeSet attrs) {
if (attrs != null) {
TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.FontTextView);
if (a.getString(R.styleable.FontTextView_font_type) != null) {
String fontName = fonts[Integer.valueOf(a.getString(R.styleable.FontTextView_font_type))];
if (fontName != null) {
Typeface myTypeface = Typeface.createFromAsset(getContext().getAssets(), "font/" + fontName);
setTypeface(myTypeface);
}
a.recycle();
}
}
}
}
添加到资产库字体
添加到attrs.xml, 数字应该在数组类中的顺序。 < declare-styleable name = " FontTextView " > <attr name="font_type" format="enum"> <enum name="HelveticaNeue" value="0"/> <enum name="HelveticaNeueLight" value="1"/> <enum name="motschcc" value="2"/> <enum name="symbol" value="3"/> < / attr >
从列表中选择字体
从资产中获取字体并设置为所有子元素
public static void overrideFonts(final Context context, final View v) {
try {
if (v instanceof ViewGroup) {
ViewGroup vg = (ViewGroup) v;
for (int i = 0; i < vg.getChildCount(); i++) {
View child = vg.getChildAt(i);
overrideFonts(context, child);
}
} else if (v instanceof TextView ) {
((TextView) v).setTypeface(Typeface.createFromAsset(context.getAssets(),"DroidNaskh.ttf"));// "BKOODB.TTF"));
}
} catch (Exception e) {
}
}
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