Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;

public class Main {
    public static final int PAINT_FLAGS = Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG | Paint.FILTER_BITMAP_FLAG;

    /**
     * A potentially expensive operation to crop the given Bitmap so that it fills the given dimensions. This operation
     * is significantly less expensive in terms of memory if a mutable Bitmap with the given dimensions is passed in
     * as well.
     *
     * @param recycled A mutable Bitmap with dimensions width and height that we can load the cropped portion of toCrop
     *                 into
     * @param toCrop The Bitmap to resize
     * @param width The width of the final Bitmap
     * @param height The height of the final Bitmap
     * @return The resized Bitmap (will be recycled if recycled is not null)
     */
    public static Bitmap centerCrop(Bitmap recycled, Bitmap toCrop, int width, int height) {
        if (toCrop == null) {
            return null;
        } else if (toCrop.getWidth() == width && toCrop.getHeight() == height) {
            return toCrop;
        }
        //from ImageView/Bitmap.createScaledBitmap
        //https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/java/android/widget/ImageView.java
        //https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/graphics/java/android/graphics/Bitmap.java
        final float scale;
        float dx = 0, dy = 0;
        Matrix m = new Matrix();
        if (toCrop.getWidth() * height > width * toCrop.getHeight()) {
            scale = (float) height / (float) toCrop.getHeight();
            dx = (width - toCrop.getWidth() * scale) * 0.5f;
        } else {
            scale = (float) width / (float) toCrop.getWidth();
            dy = (height - toCrop.getHeight() * scale) * 0.5f;
        }

        m.setScale(scale, scale);
        m.postTranslate((int) dx + 0.5f, (int) dy + 0.5f);
        final Bitmap result;
        if (recycled != null) {
            result = recycled;
        } else {
            result = Bitmap.createBitmap(width, height,
                    toCrop.getConfig() == null ? Bitmap.Config.ARGB_8888 : toCrop.getConfig());
        }
        Canvas canvas = new Canvas(result);
        Paint paint = new Paint(PAINT_FLAGS);
        canvas.drawBitmap(toCrop, m, paint);
        return result;
    }
}