我有一个字体文件,正在通过自定义TextView在布局文件中使用其图标.
我创建了一个自定义类:
CustomFontTextView类扩展了TextView
例如,字体文件Sample.ttf中的图标作为字符串资源存在:
<string name="icon"></string>
在布局中,我可以将其用作:
<com.sec.mywash.views.CustomFontTextView
custom:custom_typeface="sample_font"
android:text="@string/icon"/>.
但是,我的要求是更改在style.xml中设置为项目的操作栏中的Home up按钮:
<item "android:homeAsUpIndicator">@drawable/....</item>
如何使用style.xml中的字体文件中的图标图像(需要绘制).
解决方法:
您可以创建自己的drawable类来执行此操作,就像这样
/** Embed an icon into a Drawable that can be used as TextView icons, or ActionBar icons.
*
* new IconDrawable(context, IconValue.icon_star)
* .colorRes(R.color.white)
* .actionBarSize();
*
* If you don't set the size of the drawable, it will use the size
* that is given to him. Note that in an ActionBar, if you don't
* set the size explicitly it uses 0, so please use actionBarSize().
*/
public class FontIconDrawable extends Drawable {
public static int ANDROID_ACTIONBAR_ICON_SIZE_DP = 24;
private final Context context;
private final String icon;
private TextPaint paint;
private int size = -1;
private int alpha = 255;
/**
* Create an IconDrawable.
*
* @param context Your activity or application context.
* @param icon The icon you want this drawable to display.
*/
public FontIconDrawable(Context context, String icon, Typeface typeface) {
this.context = context;
this.icon = icon;
paint = new TextPaint();
paint.setTypeface(typeface);
paint.setStyle(Paint.Style.STROKE);
paint.setTextAlign(Paint.Align.CENTER);
paint.setUnderlineText(false);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
}
/**
* Set the size of this icon to the standard Android ActionBar.
*
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable actionBarSize() {
return sizeDp(ANDROID_ACTIONBAR_ICON_SIZE_DP);
}
/**
* Set the size of the drawable.
*
* @param dimenRes The dimension resource.
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable sizeRes(int dimenRes) {
return sizePx(context.getResources().getDimensionPixelSize(dimenRes));
}
/**
* Set the size of the drawable.
*
* @param size The size in density-independent pixels (dp).
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable sizeDp(int size) {
return sizePx(dpToPx(context.getResources(), size));
}
/**
* Dp to px.
*
* @param res the res
* @param dp the dp
* @return the int
*/
public static int dpToPx(Resources res, int dp) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
res.getDisplayMetrics());
}
/**
* Set the size of the drawable.
*
* @param size The size in pixels (px).
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable sizePx(int size) {
this.size = size;
setBounds(0, 0, size, size);
invalidateSelf();
return this;
}
/**
* Set the color of the drawable.
*
* @param color The color, usually from android.graphics.Color or 0xFF012345.
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable color(int color) {
paint.setColor(color);
invalidateSelf();
return this;
}
/**
* Set the color of the drawable.
*
* @param colorRes The color resource, from your R file.
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable colorRes(int colorRes) {
paint.setColor(context.getResources().getColor(colorRes));
invalidateSelf();
return this;
}
/**
* Set the alpha of this drawable.
*
* @param alpha The alpha, between 0 (transparent) and 255 (opaque).
* @return The current IconDrawable for chaining.
*/
public FontIconDrawable alpha(int alpha) {
setAlpha(alpha);
invalidateSelf();
return this;
}
@Override
public int getIntrinsicHeight() {
return size;
}
@Override
public int getIntrinsicWidth() {
return size;
}
@Override
public void draw(Canvas canvas) {
paint.setTextSize(getBounds().height());
Rect textBounds = new Rect();
String textValue = icon;
paint.getTextBounds(textValue, 0, 1, textBounds);
float textBottom = (getBounds().height() - textBounds.height()) / 2f + textBounds.height() - textBounds.bottom;
canvas.drawText(textValue, getBounds().width() / 2f, textBottom, paint);
}
@Override
public boolean isStateful() {
return true;
}
@Override
public boolean setState(int[] stateSet) {
int oldValue = paint.getAlpha();
int newValue = isEnabled(stateSet) ? alpha : alpha / 2;
paint.setAlpha(newValue);
return oldValue != newValue;
}
/**
* Checks if is enabled.
*
* @param stateSet the state set
* @return true, if is enabled
*/
public static boolean isEnabled(int[] stateSet) {
for (int state : stateSet)
if (state == android.R.attr.state_enabled)
return true;
return false;
}
@Override
public void setAlpha(int alpha) {
this.alpha = alpha;
paint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter cf) {
paint.setColorFilter(cf);
}
@Override
public void clearColorFilter() {
paint.setColorFilter(null);
}
@Override
public int getOpacity() {
return PixelFormat.OPAQUE;
}
/**
* Sets paint style.
*
* @param style to be applied
*/
public void setStyle(Paint.Style style) {
paint.setStyle(style);
}
}