Android图片色彩变换实现方法

public static Bitmap handleImageLikePS(Bitmap bp,float hue,float saturation,float lum){

  Bitmap bitmap=Bitmap.createBitmap(bp.getWidth(), bp.getHeight(),Bitmap.Config.ARGB_8888);
  Canvas canvas=new Canvas(bitmap);
  Paint paint=new Paint(Paint.ANTI_ALIAS_FLAG);

  ColorMatrix hueMatrix=new ColorMatrix();
  hueMatrix.setRotate(0, hue);
  hueMatrix.setRotate(1, hue);
  hueMatrix.setRotate(2, hue);

  ColorMatrix saturatiOnMatrix=new ColorMatrix();
  saturationMatrix.setSaturation(saturation);

  ColorMatrix lumMatrix=new ColorMatrix();
  lumMatrix.setScale(lum,lum,lum,1);

  ColorMatrix imageMatrix=new ColorMatrix();
  imageMatrix.postConcat(hueMatrix);
  imageMatrix.postConcat(saturationMatrix);
  imageMatrix.postConcat(lumMatrix);

  paint.setColorFilter(new ColorMatrixColorFilter(imageMatrix));
  canvas.drawBitmap(bp, 0, 0, paint);//此处如果换成bitmap就会仅仅调用一次，图像将不能被编辑

  return bitmap;
 }

package com.example.colormatrixdemo;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.SeekBar;

public class MainActivity extends Activity implements SeekBar.OnSeekBarChangeListener{

 private Bitmap bitmap;
 private ImageView imageview;
 private SeekBar hueBar,saturationBar,lumBar;

 private float mHue,mSaturation ,mLum;
 private static int MAXVALUE=255,MIDVALUE=127;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  bitmap=BitmapFactory.decodeResource(getResources(), R.drawable.masuo);
  imageview=(ImageView) findViewById(R.id.imageview);
  hueBar=(SeekBar) findViewById(R.id.hueBar);
  saturatiOnBar=(SeekBar) findViewById(R.id.saturationBar);
  lumBar=(SeekBar) findViewById(R.id.lumBar);

  hueBar.setOnSeekBarChangeListener(this);
  saturationBar.setOnSeekBarChangeListener(this);
  lumBar.setOnSeekBarChangeListener(this);

  hueBar.setMax(MAXVALUE);
  hueBar.setProgress(MIDVALUE);
  saturationBar.setMax(MAXVALUE);
  saturationBar.setProgress(MIDVALUE);
  lumBar.setMax(MAXVALUE);
  lumBar.setProgress(MIDVALUE);

  imageview.setImageBitmap(bitmap);
 }

 @Override
 public void onProgressChanged(SeekBar seekbar, int progress, boolean arg2) {
  switch(seekbar.getId()){
  case R.id.hueBar:
   mHue=(progress-MIDVALUE)*1.0F/MIDVALUE*180;
   break;
  case R.id.saturationBar:
   mSaturation=progress*1.0F/MIDVALUE;
   break;
  case R.id.lumBar:
   mLum=progress*1.0F/MIDVALUE;
   break;
  }
  imageview.setImageBitmap(ImageTools.handleImageLikePS(bitmap, mHue, mSaturation, mLum));
 }

 @Override
 public void onStartTrackingTouch(SeekBar arg0) {
  // TODO Auto-generated method stub

 }

 @Override
 public void onStopTrackingTouch(SeekBar arg0) {
  // TODO Auto-generated method stub

 }

}