ImageSplitterUtil.java

package com.liuguilin.lovewallpaper.utils;
/*
 *  项目名：  LoveWallpaper 
 *  包名：    com.liuguilin.lovewallpaper.utils
 *  文件名:   ImageSplitterUtil
 *  创建者:   LGL
 *  创建时间:  2017/1/21 11:53
 *  描述：    切图工具
 */

import android.graphics.Bitmap;

import com.liuguilin.lovewallpaper.model.ImagePiece;

import java.util.ArrayList;
import java.util.List;

public class ImageSplitterUtil {

    /**
     * 静态方法
     * 传递bitmap切成piece*piece块，返回List<ImagePiece>
     *
     * @param bitmap
     * @param piece
     * @return
     */
    public static List<ImagePiece> splitImage(Bitmap bitmap, int piece) {
        //作为返回值传递
        List<ImagePiece> imagePieces = new ArrayList<>();
        //获取图片的宽高
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        //根据宽高取最小值达到正方形
        int pieceWidth = Math.min(width, height) / piece;
        //进行切割
        for (int i = 0; i < piece; i++) {
            for (int j = 0; j < piece; j++) {
                ImagePiece imagePiece = new ImagePiece();
                imagePiece.setIndex(j + i * piece);
                int x = j * pieceWidth;
                int y = i * pieceWidth;
                //第一次循环为0,0,
                imagePiece.setBitmap(Bitmap.createBitmap(bitmap, x, y, pieceWidth, pieceWidth));
                /**
                 * 保存到list中进行返回
                 */
                imagePieces.add(imagePiece);
            }
        }
        return imagePieces;
    }
}