自定义textview字体闪烁效果

来源：互联网发布：如何把mac桌面的图标编辑：程序博客网时间：2024/05/16 02:14

这个效果是在eoeandroid上看到的，现在搬到这来，以下是核心代码

自定义的类（关键就是这个）

package com.eg.Utils;import android.content.Context;import android.graphics.Canvas;import android.graphics.LinearGradient;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.Shader;import android.util.AttributeSet;import android.widget.TextView;/** * 自定义textview字体闪烁效果 *  */public class MyTextView extends TextView {private LinearGradient mLinearGradient;private Matrix mGradientMatrix;private Paint mPaint;private int mViewWidth = 0;private int mTranslate = 0;private boolean mAnimating = true;public MyTextView(Context context, AttributeSet attrs) {super(context, attrs);}@Overrideprotected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);if (mViewWidth == 0) {mViewWidth = getMeasuredWidth();if (mViewWidth > 0) {mPaint = getPaint();mLinearGradient = new LinearGradient(-mViewWidth, 0, 0, 0,new int[] { 0x33ffffff, 0xffffffff, 0x33ffffff },new float[] { 0, 0.5f, 1 }, Shader.TileMode.CLAMP);mPaint.setShader(mLinearGradient);mGradientMatrix = new Matrix();}}}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);if (mAnimating && mGradientMatrix != null) {mTranslate += mViewWidth / 10;if (mTranslate > 2 * mViewWidth) {mTranslate = -mViewWidth;}mGradientMatrix.setTranslate(mTranslate, 0);mLinearGradient.setLocalMatrix(mGradientMatrix);postInvalidateDelayed(50);}}}

在layout使用时引用就行了，如：

<com.kehui.Utils.MyTextView                android:id="@+id/name_tv"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:gravity="center"                android:text="@string/login"                android:textSize="35sp" />

源码下载地址：自定义textview字体闪烁效果

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