Bitmap之getPixel和setPixel函数

package com.loaderman.customviewdemo;
 
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.ImageView;
 
public class MainActivity extends Activity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Bitmap srcBmp = BitmapFactory.decodeResource(getResources(), R.drawable.dog);
        ImageView iv1 = (ImageView) findViewById(R.id.img1);
        iv1.setImageBitmap(srcBmp);
 
        Bitmap desBmp = srcBmp.copy(Bitmap.Config.ARGB_8888, true);
        for (int h = 0; h < srcBmp.getHeight(); h++) {
            for (int w = 0; w < srcBmp.getWidth(); w++) {
                int originColor = srcBmp.getPixel(w, h);
 
                int red = (Color.red(originColor));
                int alpha = Color.alpha(originColor);
                int green = Color.green(originColor);
                int blue = Color.blue(originColor);
 
                if (green < 200) {
                    green += 30;
                }
 
                desBmp.setPixel(w, h, Color.argb(alpha, red, green, blue));
 
            }
        }
 
        ImageView iv2 = (ImageView) findViewById(R.id.img2);
        iv2.setImageBitmap(desBmp);
    }
 
}

效果: