颜色设置

package com.gyarmy.testcolor;

import android.os.Bundle;
import android.os.Environment;
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.Matrix;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.view.Menu;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class MainActivity extends Activity implements OnSeekBarChangeListener {
	
	private SeekBar seek_red;
	private SeekBar seek_green;
	private SeekBar seek_blue;
	private TextView text_content;
	private ImageView iv_mm;
	private Bitmap img_src;
	private float redMe = 1f;
	private float greenMe = 1f;
	private float blueMe = 1f;
	
	
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        seek_red = (SeekBar)findViewById(R.id.seek_red);
        seek_green = (SeekBar)findViewById(R.id.seek_green);
        seek_blue = (SeekBar)findViewById(R.id.seek_blue);
        text_content = (TextView)findViewById(R.id.text_content);
        iv_mm = (ImageView) findViewById(R.id.iv_mm);
        
        //String path = Environment.getExternalStorageDirectory().toString();
        String path = "/storage/emulated/0/Pictures/Screenshots/pic.png";
    	img_src = BitmapFactory.decodeFile(path);
        iv_mm.setImageBitmap(img_src);
        
        seek_red.setOnSeekBarChangeListener(this);
        seek_green.setOnSeekBarChangeListener(this);
        seek_blue.setOnSeekBarChangeListener(this);
        
    }

	@Override
	public void onProgressChanged(SeekBar seekBar, int progress,
			boolean fromUser) {
		// TODO Auto-generated method stub
		text_content.setText("progress:"+progress);
	}

	@Override
	public void onStartTrackingTouch(SeekBar seekBar) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onStopTrackingTouch(SeekBar seekBar) {
		// TODO Auto-generated method stub
		
		//改变图片的颜色
		
		//Bitmap img_dst = ((BitmapDrawable)(iv_mm.getDrawable())).getBitmap();
		if(seekBar == seek_red){
			redMe = seek_red.getProgress();
		}else if(seekBar == seek_green){
			greenMe = seek_green.getProgress();
		}else if(seekBar == seek_blue){
			blueMe = seek_blue.getProgress();
		}
		
		
		
		
		
		Bitmap img_dst = Bitmap.createBitmap(img_src.getWidth(), img_src.getHeight(), img_src.getConfig());
		Canvas cas = new Canvas(img_dst);
		Paint paint = new Paint();
		Matrix matrix = new Matrix();
		
		float[] cm = new float[]{
				1*redMe/100,0,0,0,0,
				0,1*greenMe/100,0,0,0,
				0,0,1*blueMe/100,0,0,
				0,0,0,1,0
		};
		
		
		paint.setColorFilter(new ColorMatrixColorFilter(new ColorMatrix(cm)));
		
		//matrix.setRotate(40);
		
		cas.drawBitmap(img_src, matrix, paint);
		iv_mm.setImageBitmap(img_dst);
		
	}

    
}