Android 项目总结(自定义view的滤镜详解)

import android.content.Context;
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.LightingColorFilter;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.util.AttributeSet;
import android.view.View;

import com.netease.paint.colorfilter.R;

public class ColorFilterView extends View {

    private Paint mPaint;
    private Bitmap mBitmap;
    private ColorMatrixColorFilter mColorMatrixColorFilter;

    public ColorFilterView(Context context) {
        super(context);
        mPaint = new Paint();

        mBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.girl);
    }

    public ColorFilterView(Context context, AttributeSet attrs) {
        super(context, attrs);