android ColorMatrix的例子

package dqq.test.color; import android.app.Activity; import android.graphics.Color; import android.graphics.ColorFilter; import android.graphics.ColorMatrix; import android.graphics.ColorMatrixColorFilter; import android.graphics.LightingColorFilter; import android.os.Bundle; import android.util.Log; import android.widget.ImageView; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; public class TestFilterActivity extends Activity { ImageView iv; SeekBar sb1,sb2,sb3; float a,b,c; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.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); sb1.setMax(255); sb2.setMax(255); sb3.setMax(255); sb1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { a = progress * 1.0f / 255 ; updateImage(); } }); sb2.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { b = progress * 1.0f / 255; updateImage(); } }); sb3.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { c = progress * 1.0f / 255 ; updateImage(); } }); } public void updateImage(){ //iv.setColorFilter(new LightingColorFilter(Color.BLUE, Color.RED)); iv.setColorFilter(new ColorMatrixColorFilter(new ColorMatrix(new float[]{a,0,0,0,0, 0,b,0,0,0, 0,0,c,0,0, 0,0,0,1,0}))); iv.postInvalidate(); } }