问题
In my application I need to use helvetica font for all the textviews and edit-text fields. Is there any way to do this other than using settypeface method for every textview ? Any suggestion would be a great help.
Thanks in advance !
回答1:
I figured it out by my self. This is the code I used. I create custom TextView which has custom font as default font.
public class MyTextView extends TextView {
public MyTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public MyTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public MyTextView(Context context) {
super(context);
init();
}
private void init() {
Typeface tf = Typeface.createFromAsset(getContext().getAssets(), "font/chiller.ttf");
setTypeface(tf ,1);
}
}
回答2:
In your activities, right after you call
setContentView(R.id.blahblah);
you should run a method to go over the whole hierarchy of widgets and deal with the font substitution, like;
setContentView(R.id.blahblah);
Utils.overrideFonts(this, findViewById(android.R.id.content));
And the mentioned "overrideFonts" method should be something like;
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(FONT_REGULAR);
}
} catch (Exception e) {
e.printStackTrace();
// ignore
}
}
In this scheme, FONT_REGULAR should be initialized somewhere safely, you may fancy a singleton or some other way to be sure that it is initialized properly...
private static void initializeFonts(final Context context) {
FONT_REGULAR = Typeface.createFromAsset(context.getAssets(), "fonts/myfont_medium.otf");
FONT_BOLD = Typeface.createFromAsset(context.getAssets(), "fonts/myfont_bold.otf");
}
If you use a subclass of Activity like MyAppActivity (extends Activity), then you dont need to change each and every Activity class for such customizations. Instead you may cut into it and override the behavior as such;
public class MyAppActivity extends Activity {
... ...
@Override
public void setContentView(final int layoutResID) {
super.setContentView(layoutResID);
Utils.overrideFonts(this, findViewById(android.R.id.content));
}
... ...
}
This way you can use any activity of yours to have common behavior;
public class SettingsUI extends MyAppActivity {
... ...
}
I hope it helps... Cheers!
回答3:
create a style and use it all text attributes.
<style name="CustomText">
<item name="android:typeface">YourFontName</item>
</style>
Use it:
<TextView style="@style/CustomText" />
Above is to use custom fonts in all activity for customization you can use....
Typeface font = Typeface.createFromAsset(getAssets(), "CustomFontName.ttf");
txt.setTypeface(font);
TRy this.
回答4:
To apply custom font across all application, just create following activity:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FontManager.getInstance().initialize(this, R.xml.fonts);
setContentView(R.layout.main);
}
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
SimpleFactory factory = new SimpleFactory();
return factory.onCreateView(name, context, attrs);
}
where FontManager this is class that manage all Fonts that defined in /xml/fonts.xml and SimpleFactory just factory that create views and apply custom font to each view that instance of text view.
/xml/fonts.xml
<?xml version="1.0" encoding="utf-8"?>
<familyset>
<family>
<nameset>
<!--Font name-->
<name>HelveticaNeueLTStd</name>
</nameset>
<fileset>
<!--Font styles-->
<file style="normal">fonts/HelveticaNeueLTStd-LtCn.otf</file>
<file style="bold">fonts/HelveticaNeueLTStd-MdCn.otf</file>
<file style="italic">fonts/HelveticaNeueLTStd-LtCnO.otf</file>
<file style="bold_italic">fonts/HelveticaNeueLTStd-MdCnO.otf</file>
</fileset>
</family>
<family>
<!--There new font family can be added,
don't forget add font files into /assets/fonts directory and
put the name of the font into /values/string/font.xml-->
</family>
</familyset>
FontFactory - abastract class, just extends it to create your own factory
public abstract class FontFactory implements LayoutInflater.Factory{
public final String TAG = getClass().getSimpleName();
static final Class<?>[] mConstructorSignature = new Class[] {Context.class, AttributeSet.class};
final Object[] mConstructorArgs = new Object[2];
private static final String[] sClassPrefixList = {
"android.widget.",
"android.webkit."
};
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if("ViewStub".equals(name) || "View".equals(name)){
return null;
}
View view = null;
Constructor<? extends View> constructor = null;
Class clazz = null;
if (view == null) {
if (-1 == name.indexOf('.')) {
for (String prefix : sClassPrefixList) {
clazz = getClazz(prefix, name);
if(clazz != null){
break;
}
}
} else {
clazz = getClazz("", name);
}
}
if (clazz == null) {
Log.d(TAG, "View can't be created " + name);
return null;
}
try {
constructor = clazz.getConstructor(mConstructorSignature);
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
Object[] args = mConstructorArgs;
args[1] = attrs;
if(constructor == null){
return null;
}
try {
view = constructor.newInstance(context, attrs);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
if(view != null){
onFontApply(context, view);
}
return view;
}
public abstract void onFontApply(Context context, View view);
private Class getClazz(String prefix, String name){
Class clazz = null;
try {
clazz = Class.forName(prefix + name);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} finally {
return clazz;
}
}
}
FontManager - just map font files defined in /xml/fonts.xml to font files placed in /assets directory and return TypeFace by font family name and font style.
public void initialize(Context context, int resId) {
if(mFonts != null){
Log.d(TAG,"FontManager have already initialized");
return;
}
XmlResourceParser parser = null;
try {
parser = context.getResources().getXml(resId);
mFonts = new ArrayList<Font>();
String tag;
String fontStryleAttr = null;
int eventType = parser.getEventType();
Font font = null;
do {
tag = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tag.equals(TAG_FAMILY)) {
// one of the font-families.
font = new Font();
} else if (tag.equals(TAG_NAMESET)) {
// a list of font-family names supported.
font.families = new ArrayList<String>();
} else if (tag.equals(TAG_NAME)) {
isName = true;
} else if (tag.equals(TAG_FILESET)) {
// a list of files specifying the different styles.
font.styles = new ArrayList<FontStyle>();
} else if (tag.equals(TAG_FILE)) {
isFile = true;
fontStryleAttr = parser.getAttributeValue(null, ATTR_STYLE);
}
break;
case XmlPullParser.END_TAG:
if (tag.equals(TAG_FAMILY)) {
// add it to the list.
if (font != null) {
mFonts.add(font);
font = null;
}
} else if (tag.equals(TAG_NAME)) {
isName = false;
} else if (tag.equals(TAG_FILE)) {
isFile = false;
fontStryleAttr = null;
}
break;
case XmlPullParser.TEXT:
String text = parser.getText();
if (isName) {
// value is a name, add it to list of family-names.
if (font.families != null)
font.families.add(text);
} else if (isFile) {
// value is a file, add it to the proper kind.
FontStyle fontStyle = new FontStyle();
fontStyle.font = Typeface.createFromAsset(context.getAssets(), text);
String attr = parser.getAttributeValue(null, ATTR_STYLE);
if (fontStryleAttr.equals(STYLE_BOLD))
fontStyle.style = Typeface.BOLD;
else if (fontStryleAttr.equals(STYLE_ITALIC))
fontStyle.style = Typeface.ITALIC;
else if (fontStryleAttr.equals(STYLE_BOLD_ITALIC))
fontStyle.style = Typeface.BOLD_ITALIC;
else
fontStyle.style = Typeface.NORMAL;
font.styles.add(fontStyle);
}
}
eventType = parser.next();
} while (eventType != XmlPullParser.END_DOCUMENT);
} catch (XmlPullParserException e) {
throw new InflateException("Error inflating font XML", e);
} catch (IOException e) {
throw new InflateException("Error inflating font XML", e);
} finally {
if (parser != null)
parser.close();
}
}
public Typeface get(String family, int style) {
for (Font font: mFonts) {
for (String familyName : font.families) {
if (familyName.equals(family)) {
// if no style in specified, return normal style.
if (style == -1)
style = Typeface.NORMAL;
for (FontStyle fontStyle : font.styles) {
if (fontStyle.style == style)
return fontStyle.font;
}
}
}
}
return mDefaultFont;
}
for more code and samples just look here
回答5:
Ok you can do it but what you essentially want to make is a font atlas in a kinda map format(it will have to run in unicode order which starts !"#$% '()x+,-./). What the function will do is take in a string and work out where in the atlas each corresponding letter is.
Its not too easy but each character must have the same length and width, you could have different lengths but that will be a lot harder.
回答6:
You can use PixlUI at http://bit.ly/1bzjWQn
import their .jar in your project. Use it in XML
<com.neopixl.pixlui.components.textview.TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world"
pixlui:typeface="MyFont.ttf" />
Don't forget implement scheme ( xmlns:pixlui="http://schemas.android.com/apk/com.neopixl.pixlui" )
回答7:
setContentView(R.layout.activity_main);
custfont(this, findViewById(android.R.id.content));
private void custfont(final Context context, 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(), "fonts/ostrichblack.ttf"));
}
}
catch (Exception e)
{
}
}
回答8:
import android.content.Context;
import android.graphics.Typeface;
/**
* Created by Sanjeev Kumar on 4/18/2017.
*/
public class FontManager {
public Context mContext;
public FontManager(Context context) {
this.mContext = context;
}
public Typeface getSquarkiFont() {
return Typeface.createFromAsset(mContext.getAssets(), "fonts/Squarki.ttf");
}
public Typeface getLazySpringDayFont() {
return Typeface.createFromAsset(mContext.getAssets(), "fonts/LazySpringDay.ttf");
}
}
来源：https://stackoverflow.com/questions/6926263/add-custom-font-for-complete-android-application