【移动应用开发技术】Android开发中如何使用颜色矩阵改变图片颜色透明度及亮度

【移动应用开发技术】Android开发中如何使用颜色矩阵改变图片颜色，透明度及亮度

一、如图/upload/information/20200623/125/126242.jpg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,