Android開發(fā)中使用顏色矩陣改變圖片顏色，透明度及亮度的方法

更新時(shí)間：2017年10月16日 09:25:22 作者：CharlinGod

這篇文章主要介紹了Android開發(fā)中使用顏色矩陣改變圖片顏色，透明度及亮度的方法,涉及Android針對(duì)圖片的讀取、運(yùn)算、設(shè)置等相關(guān)操作技巧,需要的朋友可以參考下

本文實(shí)例講述了Android開發(fā)中使用顏色矩陣改變圖片顏色，透明度及亮度的方法。分享給大家供大家參考，具體如下：

一、如圖

二、代碼實(shí)現(xiàn)

public class ColorImageActivity extends Activity {
 private ImageView mImageView;
 private SeekBar mSBRed,mSBGreen,mSBBlue,mSBAlpha,mSBLight;
 //修改后的圖片
 private Bitmap mModBitmap;
 //畫布
 private Canvas mCanvas;
 //畫筆
 private Paint mPaint;
 //顏色矩陣
 private ColorMatrix mColorMatrix;
 //圖片矩陣
 private Matrix mMatrix;
 //原圖
 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());
  //創(chuàng)建原圖
  mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.mm0);
  //創(chuàng)建修改的圖
  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));
  //繪制原圖
  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);
  }
 }
}

更多關(guān)于Android相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《Android圖形與圖像處理技巧總結(jié)》、《Android開發(fā)入門與進(jìn)階教程》、《Android調(diào)試技巧與常見(jiàn)問(wèn)題解決方法匯總》、《Android基本組件用法總結(jié)》、《Android視圖View技巧總結(jié)》、《Android布局layout技巧總結(jié)》及《Android控件用法總結(jié)》

希望本文所述對(duì)大家Android程序設(shè)計(jì)有所幫助。

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