bri*_*tzl 137
如果您打算将相同的字体添加到多个按钮,我建议您一直使用并将其实现为样式和子类按钮:
public class ButtonPlus extends Button {
public ButtonPlus(Context context) {
super(context);
}
public ButtonPlus(Context context, AttributeSet attrs) {
super(context, attrs);
CustomFontHelper.setCustomFont(this, context, attrs);
}
public ButtonPlus(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
CustomFontHelper.setCustomFont(this, context, attrs);
}
}
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这是一个帮助类,用于在TextView上设置字体(记住,Button是TextView的子类),基于com.my.package:font属性:
public class CustomFontHelper {
/**
* Sets a font on a textview based on the custom com.my.package:font attribute
* If the custom font attribute isn't found in the attributes nothing happens
* @param textview
* @param context
* @param attrs
*/
public static void setCustomFont(TextView textview, Context context, AttributeSet attrs) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomFont);
String font = a.getString(R.styleable.CustomFont_font);
setCustomFont(textview, font, context);
a.recycle();
}
/**
* Sets a font on a textview
* @param textview
* @param font
* @param context
*/
public static void setCustomFont(TextView textview, String font, Context context) {
if(font == null) {
return;
}
Typeface tf = FontCache.get(font, context);
if(tf != null) {
textview.setTypeface(tf);
}
}
}
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这是FontCache 减少旧设备上的内存使用量:
public class FontCache {
private static Hashtable<String, Typeface> fontCache = new Hashtable<String, Typeface>();
public static Typeface get(String name, Context context) {
Typeface tf = fontCache.get(name);
if(tf == null) {
try {
tf = Typeface.createFromAsset(context.getAssets(), name);
}
catch (Exception e) {
return null;
}
fontCache.put(name, tf);
}
return tf;
}
}
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在res/values/attrs.xml中,我们定义了自定义样式属性
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CustomFont">
<attr name="font" format="string"/>
</declare-styleable>
</resources>
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最后在布局中使用示例:
<com.my.package.buttons.ButtonPlus
style="@style/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_sometext"/>
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在res/values/style.xml中
<style name="button" parent="@android:style/Widget.Button">
<item name="com.my.package:font">fonts/copperplate_gothic_light.TTF</item>
</style>
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这可能看起来像是一项非常多的工作,但是一旦你想要改变字体的几个按钮和文本字段,你会感谢我.
npa*_*ace 11
1)获取.ttf(例如CopperplateGothicLight.ttf)文件所需的字体并将其放在项目的/ assets /目录中
2)使用此代码引用字体并将其设置为按钮:
Typeface copperplateGothicLight = Typeface.createFromAsset(getAppContext().getAssets(), "CopperplateGothicLight.ttf");
yourButton.setTypeface(copperplateGothicLight);
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