Android-美圖秀秀 APP_風格圖片( 二 )

同上一章節
其實外面的美圖工具是在參數設置上有很多的庫
簡單的說他們有很多實驗出來的參數
只要藉由格式工廠設置就變為你想要的風格
如下面常見到的樣式

MainActivity.java

public class MainActivity extends Activity implements OnClickListener{

    private ImageView imageView1;
    private ImageView imageView2;
    private Button btn1;
    private Button btn2;
    private Button btn3;
    private Button btn4;
    
    private Bitmap bitmap;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        imageView1 = (ImageView) findViewById(R.id.imageView1);
        imageView2 = (ImageView) findViewById(R.id.imageView2);
        btn1 = (Button) findViewById(R.id.button1);
        btn2 = (Button) findViewById(R.id.button2);
        btn3 = (Button) findViewById(R.id.button3);
        btn4 = (Button) findViewById(R.id.button4);
        
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);
        btn4.setOnClickListener(this);
        
        bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.pf);
        
        imageView1.setImageBitmap(bitmap);
        imageView2.setImageBitmap(bitmap);
        
    }

    @Override
    public void onClick(View view) {
        switch(view.getId()){
        case R.id.button1: // 原圖
            imageView2.setImageBitmap(bitmap);
            break;
        case R.id.button2: // 底片
            imageView2.setImageBitmap(ImageHelper.handleImageNegative(bitmap));
            break;
        case R.id.button3: // 懷舊
            imageView2.setImageBitmap(ImageHelper.handleImagePixelsOldPhoto(bitmap));
            break;
        case R.id.button4: // 浮雕
            imageView2.setImageBitmap(ImageHelper.handleImagePixelsRelief(bitmap));
            break;
        }
    }
}

ImageHelper.java

public class ImageHelper {

    public static Bitmap handleImageEffect(Bitmap bm, float hue, float saturation, float lum) {
        Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bmp);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);

        ColorMatrix hueMatrix = new ColorMatrix();
        hueMatrix.setRotate(0, hue);
        hueMatrix.setRotate(1, hue);
        hueMatrix.setRotate(2, hue);

        ColorMatrix saturationMatrix = new ColorMatrix();
        saturationMatrix.setSaturation(saturation);

        ColorMatrix lumMatrix = new ColorMatrix();
        lumMatrix.setScale(lum, lum, lum, 1);

        ColorMatrix imageMatrix = new ColorMatrix();
        imageMatrix.postConcat(hueMatrix);
        imageMatrix.postConcat(saturationMatrix);
        imageMatrix.postConcat(lumMatrix);

        paint.setColorFilter(new ColorMatrixColorFilter(imageMatrix));
        canvas.drawBitmap(bm, 0, 0, paint);

        return bmp;
    }

    public static Bitmap handleImageNegative(Bitmap bm) {
        int width = bm.getWidth();
        int height = bm.getHeight();
        int color;
        int r, g, b, a;

        Bitmap bmp = Bitmap.createBitmap(width, height
                , Bitmap.Config.ARGB_8888);

        int[] oldPx = new int[width * height];
        int[] newPx = new int[width * height];
        bm.getPixels(oldPx, 0, width, 0, 0, width, height);

        for (int i = 0; i < width * height; i++) {
            color = oldPx[i];
            r = Color.red(color);
            g = Color.green(color);
            b = Color.blue(color);
            a = Color.alpha(color);

            r = 255 - r;
            g = 255 - g;
            b = 255 - b;

            if (r > 255) {
                r = 255;
            } else if (r < 0) {
                r = 0;
            }
            if (g > 255) {
                g = 255;
            } else if (g < 0) {
                g = 0;
            }
            if (b > 255) {
                b = 255;
            } else if (b < 0) {
                b = 0;
            }
            newPx[i] = Color.argb(a, r, g, b);
        }
        bmp.setPixels(newPx, 0, width, 0, 0, width, height);
        return bmp;
    }

    public static Bitmap handleImagePixelsOldPhoto(Bitmap bm) {
        Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(),
                Bitmap.Config.ARGB_8888);
        int width = bm.getWidth();
        int height = bm.getHeight();
        int color = 0;
        int r, g, b, a, r1, g1, b1;

        int[] oldPx = new int[width * height];
        int[] newPx = new int[width * height];

        bm.getPixels(oldPx, 0, bm.getWidth(), 0, 0, width, height);
        for (int i = 0; i < width * height; i++) {
            color = oldPx[i];
            a = Color.alpha(color);
            r = Color.red(color);
            g = Color.green(color);
            b = Color.blue(color);

            r1 = (int) (0.393 * r + 0.769 * g + 0.189 * b);
            g1 = (int) (0.349 * r + 0.686 * g + 0.168 * b);
            b1 = (int) (0.272 * r + 0.534 * g + 0.131 * b);

            if (r1 > 255) {
                r1 = 255;
            }
            if (g1 > 255) {
                g1 = 255;
            }
            if (b1 > 255) {
                b1 = 255;
            }

            newPx[i] = Color.argb(a, r1, g1, b1);
        }
        bmp.setPixels(newPx, 0, width, 0, 0, width, height);
        return bmp;
    }

    public static Bitmap handleImagePixelsRelief(Bitmap bm) {
        Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(),
                Bitmap.Config.ARGB_8888);
        int width = bm.getWidth();
        int height = bm.getHeight();
        int color = 0, colorBefore = 0;
        int a, r, g, b;
        int r1, g1, b1;

        int[] oldPx = new int[width * height];
        int[] newPx = new int[width * height];

        bm.getPixels(oldPx, 0, bm.getWidth(), 0, 0, width, height);
        for (int i = 1; i < width * height; i++) {
            colorBefore = oldPx[i - 1];
            a = Color.alpha(colorBefore);
            r = Color.red(colorBefore);
            g = Color.green(colorBefore);
            b = Color.blue(colorBefore);

            color = oldPx[i];
            r1 = Color.red(color);
            g1 = Color.green(color);
            b1 = Color.blue(color);

            r = (r - r1 + 127);
            g = (g - g1 + 127);
            b = (b - b1 + 127);
            if (r > 255) {
                r = 255;
            }
            if (g > 255) {
                g = 255;
            }
            if (b > 255) {
                b = 255;
            }
            newPx[i] = Color.argb(a, r, g, b);
        }
        bmp.setPixels(newPx, 0, width, 0, 0, width, height);
        return bmp;
    }
}

點擊復古風格按鈕

如果有仔細看程式碼
上面這幾個方法最大不同在於參數設置
只要知道你想要修改風格的參數算式
就可以打造出來了

歡迎轉載，請註明出處。