Android开发中怎么实现一个文字倒影效果
发布时间:-11-25 17:18:19
来源:亿速云
阅读:140
作者:Leah
这期内容当中小编将会给大家带来有关Android开发中怎么实现一个文字倒影效果,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
布局文件中增加如下代码
android:layout_marginTop="20dp"
android:id="@+id/test_reflect" android:layout_width="fill_parent"
android:layout_height="50dp" android:textSize="25dp"
android:textColor="#ff0000" android:textStyle="bold" android:gravity="top|center_horizontal"
android:text="不会飞翔的翅膀 XP.C" />
android:layout_marginTop="20dp"
android:id="@+id/test_reflect" android:layout_width="fill_parent"
android:layout_height="50dp" android:textSize="25dp"
android:textColor="#a0a0a0" android:textStyle="italic" android:gravity="top|center_horizontal"
android:text="titanchen2000@" />
类代码如下:
/*
* Copyright (C) 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
* /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@
*
* @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);
}
}
上述就是小编为大家分享的Android开发中怎么实现一个文字倒影效果了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。