安卓 圖片顏色調整

##主文件

package com.tang.piccolor;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
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.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.os.Build;

public class MainActivity extends Activity {
	private ImageView iv;
	private SeekBar sb1;
	private SeekBar sb2;
	private SeekBar sb3;
	private SeekBar sb4;
	private Bitmap alterMap;
	private Paint paint;
	private Canvas canvas;
	private Bitmap bitmap;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		iv = (ImageView) findViewById(R.id.pic);
		sb1 = (SeekBar) findViewById(R.id.sb1); //Red
		sb2 = (SeekBar) findViewById(R.id.sb2); //green
		sb3 = (SeekBar) findViewById(R.id.sb3); //blue
		sb4 = (SeekBar) findViewById(R.id.sb4); //飽和度(三種顏色都變化)
		
		bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
		iv.setImageBitmap(bitmap);
		alterMap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), 
				bitmap.getConfig());
		canvas = new Canvas(alterMap);
		final Matrix matrix = new Matrix();
		paint = new Paint();
		paint.setColor(Color.BLACK);
		final ColorMatrix cm = new ColorMatrix();
		paint.setColorFilter(new ColorMatrixColorFilter(cm));
		canvas.drawBitmap(bitmap, matrix, paint);
		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(bitmap, matrix, paint);
				iv.setImageBitmap(alterMap);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar arg0) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
				// TODO Auto-generated method stub
				
			}
		});
		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(bitmap, matrix, paint);
				iv.setImageBitmap(alterMap);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar arg0) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
				// TODO Auto-generated method stub
				
			}
		});
		
		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(bitmap, matrix, paint);
				iv.setImageBitmap(alterMap);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar arg0) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
				// TODO Auto-generated method stub
				
			}
		});
		sb4.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
			
			@Override
			public void onStopTrackingTouch(SeekBar seekbar) {
				int progress = seekbar.getProgress();
				//cm.setSaturation(.5f);
				cm.set(new float[]{
						progress/128.0f,0,0,0,0,
						0,progress/128.0f,0,0,0,
						0,0,progress/128.0f,0,0,
						0,0,0,1,0
				});
				paint.setColorFilter(new ColorMatrixColorFilter(cm));
				canvas.drawBitmap(bitmap, matrix, paint);
				iv.setImageBitmap(alterMap);
			}
			
			@Override
			public void onStartTrackingTouch(SeekBar arg0) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
				// TODO Auto-generated method stub
				
			}
		});
	}

	
}

##模板文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/pic" />
	<SeekBar
	    android:max="255"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/sb1" />
	<SeekBar 
	     android:max="255"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/sb2" />
	<SeekBar 
	     android:max="255"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/sb3" />
	<SeekBar 
	     android:max="255"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/sb4" />			
</LinearLayout>