效果如下图所示：

具体实现方式如下：

1，自定义一个LinearGradientTextView 继承 TextView ，重写onSizeChanged和onDraw。：

public class LinearGradientTextView extends TextView { private int mViewWidth; private Paint mPaint; private LinearGradient mLinearGradient; private Matrix mMatrix; private int mTranslate; public LinearGradientTextView(Context context) { super(context); } public LinearGradientTextView(Context context, AttributeSet attrs) { super(context, attrs); } public LinearGradientTextView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } /** * LinearGradient有两个构造函数： public LinearGradient(floatx0,float y0, float x1, float y1, int[] colors, float[] positions,Shader.TileMode tile) * 参数:float x0: 渐变起始点x坐标 * float y0:渐变起始点y坐标 * float x1:渐变结束点x坐标 * float y1:渐变结束点y坐标 * int[] colors:颜色 的int 数组 * float[] positions: 相对位置的颜色数组,可为null,若为null,可为null,颜色沿渐变线均匀分布 * Shader.TileMode tile: 渲染器平铺模式 */ @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { // TODO Auto-generated method stub 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, Color.BLACK, Color.RED, Color.YELLOW }, null, Shader.TileMode.MIRROR); mPaint.setShader(mLinearGradient); mMatrix = new Matrix(); } } @Override protected void onDraw(Canvas canvas) { // TODO Auto-generated method stub super.onDraw(canvas); if (mMatrix != null) { mTranslate += mViewWidth / 5; if (mTranslate > 2 * mViewWidth) { mTranslate = -mViewWidth; } mMatrix.setTranslate(mTranslate, 0); mLinearGradient.setLocalMatrix(mMatrix); postInvalidateDelayed(100); } } }

注：这段代码主要是分两步：一个是在onSizeChanged()即大小发生改变的时候，另外一个是onDraw()主要是用来做动画的效果的。

2，XML文件 引用到这个自定义的LinearGradientTextView ：