Android开发中使用颜色矩阵改变图片颜色，透明度及亮度的方法

本文实例讲述了android开发中使用颜色矩阵改变图片颜色，透明度及亮度的方法。分享给大家供大家参考，具体如下：

一、如图

二、代码实现

public class colorimageactivity extends activity {
 private imageview mimageview;
 private seekbar msbred,msbgreen,msbblue,msbalpha,msblight;
 //修改后的图片
 private bitmap mmodbitmap;
 //画布
 private canvas mcanvas;
 //画笔
 private paint mpaint;
 //颜色矩阵
 private colormatrix mcolormatrix;
 //图片矩阵
 private matrix mmatrix;
 //原图
 private bitmap mbitmap;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_image_color);
  initviews();
 }
 private void initviews() {
  mimageview = (imageview) findviewbyid(r.id.imageview1);
  msbred = (seekbar) findviewbyid(r.id.seekbar1);
  msbgreen = (seekbar) findviewbyid(r.id.seekbar2);
  msbblue = (seekbar) findviewbyid(r.id.seekbar3);
  msbalpha = (seekbar) findviewbyid(r.id.seekbar4);
  msblight = (seekbar) findviewbyid(r.id.seekbar5);
  msbred.setonseekbarchangelistener(new redchangelistener());
  msbgreen.setonseekbarchangelistener(new greenchangelistener());
  msbblue.setonseekbarchangelistener(new bluechangelistener());
  msbalpha.setonseekbarchangelistener(new alphachangelistener());
  msblight.setonseekbarchangelistener(new lightchangelistener());
  //创建原图
  mbitmap = bitmapfactory.decoderesource(getresources(), r.drawable.mm0);
  //创建修改的图
  mmodbitmap = bitmap.createbitmap(mbitmap.getwidth()+20, mbitmap.getheight()+20, mbitmap.getconfig());
  mcanvas = new canvas(mmodbitmap);
  mpaint = new paint();
  mpaint.setcolor(color.black);
  mpaint.setantialias(true);
  mmatrix = new matrix();
  mcolormatrix = new colormatrix();
  mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
  //绘制原图
  mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
  mimageview.setimagebitmap(mmodbitmap);
 }
 private class redchangelistener implements onseekbarchangelistener{
  @override
  public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
  }
  @override
  public void onstarttrackingtouch(seekbar seekbar) {
  }
  @override
  public void onstoptrackingtouch(seekbar seekbar) {
   int progess = seekbar.getprogress();
   mcolormatrix.set(new float[]{
     progess /128.0f,0,0,0,0,
     0,1,0,0,0,
     0,0,1,0,0,
     0,0,0,1,0,
   });
   mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
   mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
   mimageview.setimagebitmap(mbitmap);
  }
 }
 private class greenchangelistener implements onseekbarchangelistener{
  @override
  public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
  }
  @override
  public void onstarttrackingtouch(seekbar seekbar) {
  }
  @override
  public void onstoptrackingtouch(seekbar seekbar) {
   int progess = seekbar.getprogress();
   mcolormatrix.set(new float[]{
     1,0,0,0,0,
     0,progess/128.0f,0,0,0,
     0,0,1,0,0,
     0,0,0,1,0,
   });
   mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
   mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
   mimageview.setimagebitmap(mmodbitmap);
  }
 }
 private class bluechangelistener implements onseekbarchangelistener{
  @override
  public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
  }
  @override
  public void onstarttrackingtouch(seekbar seekbar) {
  }
  @override
  public void onstoptrackingtouch(seekbar seekbar) {
   int progess = seekbar.getprogress();
   mcolormatrix.set(new float[]{
     1,0,0,0,0,
     0,1,0,0,0,
     0,0,progess/128.0f,0,0,
     0,0,0,1,0,
   });
   mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
   mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
   mimageview.setimagebitmap(mmodbitmap);
  }
 }
 private class alphachangelistener implements onseekbarchangelistener{
  @override
  public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
  }
  @override
  public void onstarttrackingtouch(seekbar seekbar) {
  }
  @override
  public void onstoptrackingtouch(seekbar seekbar) {
   int progess = seekbar.getprogress();
   mcolormatrix.set(new float[]{
     1,0,0,0,0,
     0,1,0,0,0,
     0,0,1,0,0,
     0,0,0,progess/50.0f,0,
   });
   mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
   mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
   mimageview.setimagebitmap(mmodbitmap);
  }
 }
 //更改亮度
 private class lightchangelistener implements onseekbarchangelistener{
  @override
  public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
  }
  @override
  public void onstarttrackingtouch(seekbar seekbar) {
  }
  @override
  public void onstoptrackingtouch(seekbar seekbar) {
   int progess = seekbar.getprogress();
   mcolormatrix.set(new float[]{
     progess/128.0f,0,0,0,0,
     0,progess/128.0f,0,0,0,
     0,0,progess/128.0f,0,0,
     0,0,0,1,0,
   });
   mpaint.setcolorfilter(new colormatrixcolorfilter(mcolormatrix));
   mcanvas.drawbitmap(mbitmap, mmatrix, mpaint);
   mimageview.setimagebitmap(mmodbitmap);
  }
 }
}

更多关于android相关内容感兴趣的读者可查看本站专题：《android图形与图像处理技巧总结》、《android开发入门与进阶教程》、《android调试技巧与常见问题解决方法汇总》、《android基本组件用法总结》、《android视图view技巧总结》、《android布局layout技巧总结》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。