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Android studio中TextView改变字体的两种方式（如仿宋、隶书）
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在Android中系统默认的字体有三种，通过在TextView中加上android:typeface=”sans”来改变，而sans就是三种当中的其中的一种，还有两种分别是“monospace”和“serif”；当我们不想用着三种方式的话还可以使用外在的字体—–导入字体文件 使用外在字体的方式有很多，下面简单分享一下使用外在字体其中的两种方式，效果图： 2、在我们的布局文件中做准备工作，拖入一个TextView控件 3、在代码中找到我们导进来的字体并在TextView上使用
第二种方式：写一个类继承TextView，所有的东西都放入到这个类里面，在要用到换字体的地方就使用这个类 步骤： 1，新建一个类，让这个类继承TextView /** * 1.version: * 2.date:2017/1/13 15:26 * 3.update:2017/1/13. * 4.autour:张玉杰 */ import android.content.Context; import android.content.res.TypedArray; import android.text.TextUtils; import android.util.AttributeSet; import android.widget.TextView; /** * Created by Administrator on 2015/10/27. */ public class FontTextView extends TextView { /** The file name of the font data in the assets directory*/ private String mFontPath = null; public FontTextView(Context context) { super(context); init(context, null, 0); } public FontTextView(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs, 0); } public FontTextView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context, attrs, defStyleAttr); } public String getFontPath() { return mFontPath; } /** *Set font file fontPath * @param fontPath The file name of the font data in the assets directory */ public void setFontPath(String fontPath) { mFontPath = fontPath; if (!TextUtils.isEmpty(mFontPath)) { FontUtils.getInstance().replaceFontFromAsset(this, mFontPath); } } private void init(Context context, AttributeSet attrs, int defStyleAttr) { TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.FontTextView, defStyleAttr, 0); mFontPath = typedArray.getString(R.styleable.FontTextView_font_path); typedArray.recycle(); if (!TextUtils.isEmpty(mFontPath)) { FontUtils.getInstance().replaceFontFromAsset(this, mFontPath); } } }2、在写一个类用来选择字体 /** * 1.version: * 2.date:2017/1/13 15:27 * 3.update:2017/1/13. * 4.autour:张玉杰 */ import android.content.Context; import android.graphics.Typeface; import android.support.annotation.NonNull; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import java.lang.ref.SoftReference; import java.lang.reflect.Field; import java.util.HashMap; import java.util.Map; public class FontUtils { private static final String TAG = FontUtils.class.getSimpleName(); private Map mCache = new HashMap(); private static FontUtils sSingleton = null; public static Typeface DEFAULT = Typeface.DEFAULT; // disable instantiate private FontUtils() { } public static FontUtils getInstance() { // double check if (sSingleton == null) { synchronized (FontUtils.class) { if (sSingleton == null) { sSingleton = new FontUtils(); } } } return sSingleton; } public void replaceFontFromAsset(@NonNull View root, @NonNull String fontPath) { replaceFont(root, createTypefaceFromAsset(root.getContext(), fontPath)); } public void replaceFontFromAsset(@NonNull View root, @NonNull String fontPath, int style) { replaceFont(root, createTypefaceFromAsset(root.getContext(), fontPath), style); } public void replaceFontFromFile(@NonNull View root, @NonNull String fontPath) { replaceFont(root, createTypefaceFromFile(fontPath)); } public void replaceFontFromFile(@NonNull View root, @NonNull String fontPath, int style) { replaceFont(root, createTypefaceFromFile(fontPath), style); } private void replaceFont(@NonNull View root, @NonNull Typeface typeface) { if (root == null || typeface == null) { return; } if (root instanceof TextView) { // If view is TextView or it's subclass, replace it's font TextView textView = (TextView) root; // Extract previous style of TextView int style = Typeface.NORMAL; if (textView.getTypeface() != null) { style = textView.getTypeface().getStyle(); } textView.setTypeface(typeface, style); } else if (root instanceof ViewGroup) { // If view is ViewGroup, apply this method on it's child views ViewGroup viewGroup = (ViewGroup) root; for (int i = 0; i < viewGroup.getChildCount(); ++i) { replaceFont(viewGroup.getChildAt(i), typeface); } } // else return } private void replaceFont(@NonNull View root, @NonNull Typeface typeface, int style) { if (root == null || typeface == null) { return; } if (style < 0 || style > 3) { style = Typeface.NORMAL; } if (root instanceof TextView) { // If view is TextView or it's subclass, replace it's font TextView textView = (TextView) root; textView.setTypeface(typeface, style); } else if (root instanceof ViewGroup) { // If view is ViewGroup, apply this method on it's child views ViewGroup viewGroup = (ViewGroup) root; for (int i = 0; i < viewGroup.getChildCount(); ++i) { replaceFont(viewGroup.getChildAt(i), typeface, style); } } // else return } private Typeface createTypefaceFromAsset(Context context, String fontPath) { SoftReference typefaceRef = mCache.get(fontPath); Typeface typeface = null; if (typefaceRef == null || (typeface = typefaceRef.get()) == null) { typeface = Typeface.createFromAsset(context.getAssets(), fontPath); typefaceRef = new SoftReference(typeface); mCache.put(fontPath, typefaceRef); } return typeface; } private Typeface createTypefaceFromFile(String fontPath) { SoftReference typefaceRef = mCache.get(fontPath); Typeface typeface = null; if (typefaceRef == null || (typeface = typefaceRef.get()) == null) { typeface = Typeface.createFromFile(fontPath); typefaceRef = new SoftReference(typeface); mCache.put(fontPath, typefaceRef); } return typeface; } public void replaceSystemDefaultFontFromAsset(@NonNull Context context, @NonNull String fontPath) { replaceSystemDefaultFont(createTypefaceFromAsset(context, fontPath)); } public void replaceSystemDefaultFontFromFile(@NonNull Context context, @NonNull String fontPath) { replaceSystemDefaultFont(createTypefaceFromFile(fontPath)); } private void replaceSystemDefaultFont(@NonNull Typeface typeface) { modifyObjectField(null, "MONOSPACE", typeface); } private void modifyObjectField(Object obj, String fieldName, Object value) { try { Field defaultField = Typeface.class.getDeclaredField(fieldName); defaultField.setAccessible(true); defaultField.set(obj, value); } catch (NoSuchFieldException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } } }3、在布局文件里面直接用上类的全类名，这样在实时视图里面就能看到效果 效果图： 项目地址： http://download.csdn.net/detail/lanrenxiaowen/9737027 |
第一种方式：在代码中定义TextView的字体 步骤： 1、我们首先在src/main文件下创建assets文件夹，为了规范起见，我们再在assets文件夹下创建font文件夹，然后将我们的字体文件(*.ttf)放进fonts文件夹下，如图所示：
效果： 
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