package net.hnjdzy.imagecolor;

import android.os.Bundle;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.ColorMatrix;

import android.graphics.ColorMatrixColorFilter;

import android.graphics.Matrix;

import android.graphics.Paint;

import android.view.Menu;

import android.widget.ImageView;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends Activity {

    private ImageView iv;

    private SeekBar sb1,sb2,sb3;

    private Canvas canvas;

    private Paint paint;

    private ColorMatrix cm;

    private Matrix matrix;

    private Bitmap b1,b2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        iv = (ImageView) findViewById(R.id.imageView1);

        sb1 = (SeekBar) findViewById(R.id.seekBar1);

        sb2 = (SeekBar) findViewById(R.id.seekBar2);

        sb3 = (SeekBar) findViewById(R.id.seekBar3)；

        b1 = BitmapFactory.decodeResource(getResources(), R.drawable.fq);

        b2 = Bitmap.createBitmap(b1.getWidth(), b1.getHeight(), b1.getConfig());

        canvas = new Canvas(b2);

        paint = new Paint();

        paint.setColor(Color.BLACK);

        matrix = new Matrix();

        paint.setAntiAlias(true);

        //颜色矩阵

        cm = new ColorMatrix();

        paint.setColorFilter(new ColorMatrixColorFilter(cm));

        canvas.drawBitmap(b1, matrix, paint);

        iv.setImageBitmap(b2);

        //改变RGB中R的值

        sb1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override

            public void onStopTrackingTouch(SeekBar seekBar) {

                int progress = seekBar.getProgress();

                cm.set(new float[]{

                    progress/128.0f,0,0,0,0,

                    0,1,0,0,0,

                    0,0,1,0,0,

                    0,0,0,1,0

                });

                paint.setColorFilter(new ColorMatrixColorFilter(cm));

                canvas.drawBitmap(b1, matrix, paint);

                iv.setImageBitmap(b2);

            }

            @Override

            public void onStartTrackingTouch(SeekBar seekBar) {

                // TODO Auto-generated method stub

            }

            @Override

            public void onProgressChanged(SeekBar seekBar, int progress,

                    boolean fromUser) {

                // TODO Auto-generated method stub

            }

        });

        //改变RGB中G的值

        sb2.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override

            public void onStopTrackingTouch(SeekBar seekBar) {

                int progress = seekBar.getProgress();

                cm.set(new float[]{

                    1,0,0,0,0,

                    0,progress/128.0f,0,0,0,

                    0,0,1,0,0,

                    0,0,0,1,0

                });

                paint.setColorFilter(new ColorMatrixColorFilter(cm));

                canvas.drawBitmap(b1, matrix, paint);

                iv.setImageBitmap(b2);

            }

            @Override

            public void onStartTrackingTouch(SeekBar seekBar) {

                // TODO Auto-generated method stub

            }

            @Override

            public void onProgressChanged(SeekBar seekBar, int progress,

                    boolean fromUser) {

                // TODO Auto-generated method stub

            }

        });

        //改变RGB中B的值

         sb3.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override

            public void onStopTrackingTouch(SeekBar seekBar) {

                int progress = seekBar.getProgress();

                cm.set(new float[]{

                    1,0,0,0,0,

                    0,1,0,0,0,

                    0,0,progress/128.0f,0,0,

                    0,0,0,1,0

                });

                paint.setColorFilter(new ColorMatrixColorFilter(cm));

                canvas.drawBitmap(b1, matrix, paint);

                iv.setImageBitmap(b2);

            }

            @Override

            public void onStartTrackingTouch(SeekBar seekBar) {

                // TODO Auto-generated method stub

            }

            @Override

            public void onProgressChanged(SeekBar seekBar, int progress,

                    boolean fromUser) {

                // TODO Auto-generated method stub

            }

        });

    }

}