Android example source code file (ReplacementSpan.java)

This example Android source code file (ReplacementSpan.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, charsequence, drawing, graphics, metricaffectingspan, paint, replacementspan, text, ui

The ReplacementSpan.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.Canvas;
import android.text.TextPaint;

public abstract class ReplacementSpan extends MetricAffectingSpan {

    public abstract int getSize(Paint paint, CharSequence text,
                         int start, int end,
                         Paint.FontMetricsInt fm);
    public abstract void draw(Canvas canvas, CharSequence text,
                     int start, int end, float x,
                     int top, int y, int bottom, Paint paint);

    /**
     * This method does nothing, since ReplacementSpans are measured
     * explicitly instead of affecting Paint properties.
     */
    public void updateMeasureState(TextPaint p) { }

    /**
     * This method does nothing, since ReplacementSpans are drawn
     * explicitly instead of affecting Paint properties.
     */
    public void updateDrawState(TextPaint ds) { }
}