Я нашел этот пример ColorMatrix
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.apis.graphics;
import com.example.android.apis.R;
import android.app.Activity;
import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
public class ColorMatrixSample extends GraphicsActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
private ColorMatrix mCM = new ColorMatrix();
private Bitmap mBitmap;
private float mSaturation;
private float mAngle;
public SampleView(Context context) {
super(context);
mBitmap = BitmapFactory.decodeResource(context.getResources(),
R.drawable.balloons);
}
private static void setTranslate(ColorMatrix cm, float dr, float dg,
float db, float da) {
cm.set(new float[] {
2, 0, 0, 0, dr,
0, 2, 0, 0, dg,
0, 0, 2, 0, db,
0, 0, 0, 1, da });
}
private static void setContrast(ColorMatrix cm, float contrast) {
float scale = contrast + 1.f;
float translate = (-.5f * scale + .5f) * 255.f;
cm.set(new float[] {
scale, 0, 0, 0, translate,
0, scale, 0, 0, translate,
0, 0, scale, 0, translate,
0, 0, 0, 1, 0 });
}
private static void setContrastTranslateOnly(ColorMatrix cm, float contrast) {
float scale = contrast + 1.f;
float translate = (-.5f * scale + .5f) * 255.f;
cm.set(new float[] {
1, 0, 0, 0, translate,
0, 1, 0, 0, translate,
0, 0, 1, 0, translate,
0, 0, 0, 1, 0 });
}
private static void setContrastScaleOnly(ColorMatrix cm, float contrast) {
float scale = contrast + 1.f;
float translate = (-.5f * scale + .5f) * 255.f;
cm.set(new float[] {
scale, 0, 0, 0, 0,
0, scale, 0, 0, 0,
0, 0, scale, 0, 0,
0, 0, 0, 1, 0 });
}
@Override protected void onDraw(Canvas canvas) {
Paint paint = mPaint;
float x = 20;
float y = 20;
canvas.drawColor(Color.WHITE);
paint.setColorFilter(null);
canvas.drawBitmap(mBitmap, x, y, paint);
ColorMatrix cm = new ColorMatrix();
mAngle += 2;
if (mAngle > 180) {
mAngle = 0;
}
//convert our animated angle [-180...180] to a contrast value of [-1..1]
float contrast = mAngle/180.f;
setContrast(cm, contrast);
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(mBitmap, x + mBitmap.getWidth() + 10, y, paint);
setContrastScaleOnly(cm, contrast);
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(mBitmap, x, y + mBitmap.getHeight() + 10, paint);
setContrastTranslateOnly(cm, contrast);
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(mBitmap, x, y + 2*(mBitmap.getHeight() + 10),
paint);
invalidate();
}
}
}
Взятые из http://alvinalexander.com/java/jwarehouse/android-examples/platforms/android-6/samples/ApiDemos/src/com/example/android/apis/graphics/ColorMatrixSample.java.shtml
Также кто-то еще имеет очень хороший ответ здесь в SO Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
, какой процесс вы делаете? вы вращаетесь, масштабируетесь, меняете цвета? должен ли процесс применяться в пиксельно-пиксельном подходе? –
Я обновил вопрос, хочу изменить цвета. –
Для ваших изменений цвета вам лучше использовать ** ColorMatrix ** вместо двухпетлевой двойной петли. –