对现有控件进行拓展

写的带有带有背景和边框

package com.example.administrator.youku_animi.MyView;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.LinearGradient;import android.graphics.Paint;import android.widget.TextView;/** * Created by Administrator on 2017/7/22 0022. */public class MyTextView extends TextView{    Paint mPaint1 = null;    Paint mPaint2 = null;    LinearGradient mLinearGradient = null;    public MyTextView(Context context)    {        super(context);    }    @Override    protected void onDraw(Canvas canvas)    {        mPaint1 = new Paint();        mPaint1.setColor(getResources().getColor(android.R.color.holo_blue_light));        mPaint1.setStyle(Paint.Style.FILL);        mPaint2 = new Paint();        mPaint2.setColor(Color.YELLOW);        mPaint2.setStyle(Paint.Style.FILL);        //Preconcat the current matrix with the specified translation         canvas.drawRect(                0,                0,                getMeasuredWidth(),                getMeasuredHeight(),                mPaint1        );        canvas.drawRect(                10,                10,                getMeasuredWidth() - 10,                getMeasuredHeight() - 10,                mPaint2        );        //Saves the current matrix and clip onto a private stack.        canvas.save();        //Preconcat the current matrix with the specified translation         canvas.translate(10, 0);        super.onDraw(canvas);        //This call balances a previous call to save(), and is used to remove all modifications to the matrix/clip state since the last save call.        canvas.restore();    }}

闪动字体的TextView

package com.example.administrator.youku_animi.MyView;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.widget.TextView;/** * Created by Administrator on 2017/7/22 0022. */public class MyTextView2 extends TextView{    int mTranslate ;    int mViewWidth;    LinearGradient mLinearGradient = null;    Paint mPaint;    Matrix matrix = null, matrix1;    public MyTextView2(Context context)    {        super(context);    }    @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.RED,                                0xffffffff,                                Color.BLUE                        },                        null,                        Shader.TileMode.REPEAT                );                mPaint.setShader(mLinearGradient);                matrix = new Matrix();            }        }    }    @Override    protected void onDraw(Canvas canvas)    {        super.onDraw(canvas);        if (matrix != null)        {            mTranslate += mViewWidth / 10;        }        matrix.setTranslate(mTranslate, 0);        mLinearGradient.setLocalMatrix(matrix);        postInvalidateDelayed(100);    }}