android 文字倒影textshadow

/* * Copyright (C) 2011 TC 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. This code is base on the Android TextView and was Created by titanchen2000@yahoo.com.cn * * @author TC */ package com.tc.reflect; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.LinearGradient; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.PorterDuffXfermode; import android.graphics.PorterDuff.Mode; import android.graphics.Shader.TileMode; import android.util.AttributeSet; import android.widget.TextView; public class ReflectTextView extends TextView { public ReflectTextView(Context context) { super(context); } public ReflectTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public ReflectTextView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onDraw(Canvas canvas) { //draw the text from layout() super.onDraw(canvas); int height = getHeight(); int width = getWidth(); //make the shadow reverse of Y Matrix matrix = new Matrix(); matrix.preScale(1, -1); //make sure you can use the cache setDrawingCacheEnabled(true); //create bitmap from cache,this is the most important of this Bitmap originalImage = Bitmap.createBitmap(getDrawingCache()); //create the shadow Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height / 3, width, height / 3, matrix, false); //draw the shadow canvas.drawBitmap(reflectionImage, 0, 8 * height / 12, null); //process shadow bitmap to make it shadow like Paint paint = new Paint(); LinearGradient shader = new LinearGradient(0, 8 * height / 12, 0, height, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); canvas.drawRect(0, 8 * height / 12, width, height, paint); } }