有没有办法只使用xml传递TextView(或它的子类)的自定义字体,而不提供像这样的任何java代码
Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/CustomFont.ttf");
答案 0 :(得分:5)
不可能完全来自XML ,但可以创建自定义视图并从XML引用它。这样,您只需编写一次代码,就可以以各种布局回收它。
例如,声明类FontTextView
:
package com.example;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;
public class FontTextView extends TextView {
/**
* Note that when generating the class from code, you will need
* to call setCustomFont() manually.
*/
public FontTextView(Context context) {
super(context);
}
public FontTextView(Context context, AttributeSet attrs) {
super(context, attrs);
setCustomFont(this, attrs);
}
public FontTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setCustomFont(this, attrs);
}
private void setCustomFont(Context context, AttributeSet attrs) {
if (isInEditMode()) {
// Ignore if within Eclipse
return;
}
String font = "myDefaultFont.ttf";
if (attrs != null) {
// Look up any layout-defined attributes
TypedArray a = obtainStyledAttributes(attrs,
R.styleable.FontTextView);
for (int i = 0; i < a.getIndexCount(); i++) {
int attr = a.getIndex(i);
switch (attr) {
case R.styleable.FontTextView_customFont:
font = a.getString(attr, 0);
break;
}
}
a.recycle();
}
Typeface tf = null;
try {
tf = Typeface.createFromAsset(getAssets(), font);
} catch (Exception e) {
Log.e("Could not get typeface: " + e.getMessage());
}
setTypeface(tf);
}
}
在res/values/attrs.xml
中定义属性:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="FontTextView">
<attr name="customFont" format="string" />
</declare-styleable>
</resources>
在布局中使用它:
声明命名空间:
xmlns:custom="http://schemas.android.com/apk/res/com.example"
使用FontTextView
:
<com.example.FontTextView
android:id="@+id/introduction"
customFont="myCustomFont.ttf"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello world!" />