直接上代码吧:你们要用的话可以按照想法改

package com.demo.util;import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Environment;
import android.util.Log;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;public class ImageProcessingUtils {// 将图片分割并拉伸到指定尺寸并保存到本地public static void splitAndSaveImage(String imagePath, int splitCount, int targetWidth, int targetHeight) {// 1. 读取原始图片Log.e("TAG", "imagePath=======" + imagePath);Bitmap originalBitmap = BitmapFactory.decodeFile(imagePath);try {int originalWidth = originalBitmap.getWidth();int originalHeight = originalBitmap.getHeight();Log.e("TAG", "originalWidth=======" + originalWidth);Log.e("TAG", "originalHeight=======" + originalHeight);// 2. 计算分割后每部分图片的宽度和高度int splitWidth = originalWidth / splitCount;int splitHeight = originalHeight - 1;Log.e("TAG", "splitWidth=======" + splitWidth);Log.e("TAG", "splitHeight=======" + splitHeight);// 3. 创建输出目录（如果不存在）File outputDirectory = new File(Environment.getExternalStorageDirectory() + "/split_images");if (!outputDirectory.exists()) {outputDirectory.mkdirs();}// 4. 分割并拉伸图片，并保存到本地for (int col = 0; col < splitCount; col++) {Log.e("TAG", "col=======" + col);int startX = col * splitWidth;int startY = 0;Log.e("TAG", "startX=======" + startX);Log.e("TAG", "startY=======" + startY);// 获取分割区域的图像Bitmap splitBitmap = Bitmap.createBitmap(originalBitmap, startX, startY,splitWidth, splitHeight);// 拉伸图像尺寸//Bitmap resizedBitmap = Bitmap.createScaledBitmap(splitBitmap,//        targetWidth, targetHeight, true);// // 旋转图像// Matrix matrix = new Matrix();// matrix.postRotate(90);// Bitmap rotatedBitmap = Bitmap.createBitmap(splitBitmap, 0, 0,//         splitWidth, splitHeight, matrix, true);
//// 构建输出文件路径String outputFilePath = outputDirectory.getAbsolutePath() + "/split_image_" + col + ".png";Log.e("TAG", "outputFilePath=======" + outputFilePath);// 保存图像到本地saveImage(splitBitmap, outputFilePath);}}catch (Exception c){Log.e("TAG", "c=======" + c.getMessage());}}// 保存图片到本地private static void saveImage(Bitmap bitmap, String filePath) {try {FileOutputStream out = new FileOutputStream(filePath);bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);out.flush();out.close();} catch (IOException e) {e.printStackTrace();}}
}

调用方式:ImageProcessingUtils.splitAndSaveImage(sourcePath,3,width,height);
 sourcePath:原始图像地址

3:平均分成三份

width,height:想要拉伸的尺寸