创建一个工具类 ：FileUtil
package com.example.testUtil;
import java.io.File;
//从本地读取图片
public class FileUtil {
public static String[] getImageNames(String folderPath) {
File file01 = new File(folderPath);
String[] files01 = file01.list();
int imageFileNums = 0;
for (int i = 0; i < files01.length; i++) {
File file02 = new File(folderPath + "/" + files01[i]);
if (!file02.isDirectory()) {
if (isImageFile(file02.getName())) {
imageFileNums++;
}
}
}
String[] files02 = new String[imageFileNums];
int j = 0;
for (int i = 0; i < files01.length; i++) {
File file02 = new File(folderPath + "/" + files01[i]);
if (!file02.isDirectory()) {
if (isImageFile(file02.getName())) {
files02[j] = file02.getName();
j++;
}
}
}
return files02;
}
private static boolean isImageFile(String fileName) {
String fileEnd = fileName.substring(fileName.lastIndexOf(".") + 1,
fileName.length());
if (fileEnd.equalsIgnoreCase("jpg")) {
return true;
} else if (fileEnd.equalsIgnoreCase("png")) {
return true;
} else if (fileEnd.equalsIgnoreCase("bmp")) {
return true;
} else {
return false;
}
}
}
然后在我们的主方法中去调用：
千万不能忘记添加我们的权限：
