ColorMatrix图片饱和度设置
package com.loaderman.customviewdemo; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.ColorMatrix; import android.graphics.ColorMatrixColorFilter; import android.graphics.Paint; import android.os.Bundle; import android.widget.ImageView; import android.widget.SeekBar; public class MainActivity extends Activity { private SeekBar mSeekBar; private ImageView mImageView; private Bitmap mOriginBmp,mTempBmp; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mImageView = (ImageView) findViewById(R.id.img); mSeekBar = (SeekBar)findViewById(R.id.seekbar); mOriginBmp = BitmapFactory.decodeResource(getResources(), R.drawable.dog); mTempBmp = Bitmap.createBitmap(mOriginBmp.getWidth(), mOriginBmp.getHeight(), Bitmap.Config.ARGB_8888); mSeekBar.setMax(20); mSeekBar.setProgress(1); mSeekBar.setProgress(10); mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { Bitmap bitmap = handleColorMatrixBmp(progress); mImageView.setImageBitmap(bitmap); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } private Bitmap handleColorMatrixBmp(int progress){ // 创建一个相同尺寸的可变的位图区,用于绘制调色后的图片 Canvas canvas = new Canvas(mTempBmp); // 得到画笔对象 Paint paint = new Paint(); // 新建paint paint.setAntiAlias(true); // 设置抗锯齿,也即是边缘做平滑处理 ColorMatrix mSaturationMatrix = new ColorMatrix(); mSaturationMatrix.setSaturation(progress); paint.setColorFilter(new ColorMatrixColorFilter(mSaturationMatrix));// 设置颜色变换效果 canvas.drawBitmap(mOriginBmp, 0, 0, paint); // 将颜色变化后的图片输出到新创建的位图区 // 返回新的位图,也即调色处理后的图片 return mTempBmp; } private Bitmap handleColorRotateBmp(int progress){ // 创建一个相同尺寸的可变的位图区,用于绘制调色后的图片 Canvas canvas = new Canvas(mTempBmp); // 得到画笔对象 Paint paint = new Paint(); // 新建paint paint.setAntiAlias(true); // 设置抗锯齿,也即是边缘做平滑处理 ColorMatrix mSaturationMatrix = new ColorMatrix(); mSaturationMatrix.setSaturation(progress); paint.setColorFilter(new ColorMatrixColorFilter(mSaturationMatrix));// 设置颜色变换效果 canvas.drawBitmap(mOriginBmp, 0, 0, paint); // 将颜色变化后的图片输出到新创建的位图区 // 返回新的位图,也即调色处理后的图片 return mTempBmp; } }
效果:
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