Android自定义View实现闪耀字体效果

本文实例为大家分享了闪耀字体效果的具体代码，供大家参考，具体内容如下

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.widget.TextView;

/**
* 闪耀字体
*/

public class ShiningFontView extends TextView {
 private int mViewWidth;
 private Paint mPaint;
 private LinearGradient mLinearGradient;
 private Matrix mGradientMatrix;
 private int mTranslate;

public ShiningFontView(Context context) {
   super(context);
 }

public ShiningFontView(Context context, AttributeSet attrs) {
   super(context, attrs);
 }

public ShiningFontView(Context context, AttributeSet attrs, int defStyleAttr) {
   super(context, attrs, defStyleAttr);
 }

@Override
 protected 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(0, 0, mViewWidth, 0, new int[]{Color.BLUE, 0xffffffff, Color.BLUE}, null, Shader.TileMode.CLAMP);
       mPaint.setShader(mLinearGradient);
       mGradientMatrix = new Matrix();
     }
   }
 }

@Override
 protected void onDraw(Canvas canvas) {
   super.onDraw(canvas);
   if (mGradientMatrix != null) {
     mTranslate += mViewWidth / 5;
     if (mTranslate > 2 * mViewWidth) {
       mTranslate = -mViewWidth;
     }
     mGradientMatrix.setTranslate(mTranslate, 0);
     mLinearGradient.setLocalMatrix(mGradientMatrix);
     postInvalidateDelayed(100);
   }
 }

}

使用方式如下

<com.hz56pt.huipaotui.view.ShiningFontView//包裹起来就行
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_centerVertical="true"
     android:layout_marginLeft="@dimen/margin_10"
     android:layout_toRightOf="@id/iv_tips1_icon"
     android:text="@string/tips1" />

效果图如下