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Android example source code file (TypefaceSpan.java)

This example Android source code file (TypefaceSpan.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, drawing, graphics, metricaffectingspan, override, paint, parcelablespan, string, text, typeface, typefacespan, ui

The TypefaceSpan.java Android example source code

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.text.style;

import android.graphics.Paint;
import android.graphics.Typeface;
import android.os.Parcel;
import android.text.ParcelableSpan;
import android.text.TextPaint;
import android.text.TextUtils;

/**
 * Changes the typeface family of the text to which the span is attached.
 */
public class TypefaceSpan extends MetricAffectingSpan implements ParcelableSpan {
    private final String mFamily;

    /**
     * @param family The font family for this typeface.  Examples include
     * "monospace", "serif", and "sans-serif".
     */
    public TypefaceSpan(String family) {
        mFamily = family;
    }

    public TypefaceSpan(Parcel src) {
        mFamily = src.readString();
    }
    
    public int getSpanTypeId() {
        return TextUtils.TYPEFACE_SPAN;
    }
    
    public int describeContents() {
        return 0;
    }

    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(mFamily);
    }

    /**
     * Returns the font family name.
     */
    public String getFamily() {
        return mFamily;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        apply(ds, mFamily);
    }

    @Override
    public void updateMeasureState(TextPaint paint) {
        apply(paint, mFamily);
    }

    private static void apply(Paint paint, String family) {
        int oldStyle;

        Typeface old = paint.getTypeface();
        if (old == null) {
            oldStyle = 0;
        } else {
            oldStyle = old.getStyle();
        }

        Typeface tf = Typeface.create(family, oldStyle);
        int fake = oldStyle & ~tf.getStyle();

        if ((fake & Typeface.BOLD) != 0) {
            paint.setFakeBoldText(true);
        }

        if ((fake & Typeface.ITALIC) != 0) {
            paint.setTextSkewX(-0.25f);
        }

        paint.setTypeface(tf);
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android TypefaceSpan.java source code file:

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