摘要： importandroid.app.Activity;importandroid.content.Context;importandroid.graphics.Bitmap;importandroid.graphics.BitmapFactory;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.graphics.PorterDuff;importandroid.graphics.PorterDuff.Mode;importandroid.g 阅读全文