1、实体类Photo.ajva
public class Photo {private String name;//名称private String date;//日期private long size; //大小private String path;//路径/*** 构造函数*/public Photo() {}public Photo(String name, String date, long size, String path) {this.name = name;this.date = date;this.size = size;this.path = path;}}
2、在AndroidManifest.xml里添加权限
<!-- 读写权限 --><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
3、Activity活动里读取手机中的图片
private void initData() {//读取手机中的相片Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null);List<Photo> mPhotoList= new ArrayList<Photo>();while (cursor.moveToNext()) {//获取图片的路径String path=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));if(path!=null && path.length() >0) {//获取图片的名称String name = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));//获取图片最后修改的日期File file = new File(path);long modifieTime = file.lastModified();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");String date = sdf.format(new Date(modifieTime));//获取图片的大小long size = cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.SIZE));Photo photo = new Photo(name, date, size, path);mPhotoList.add(photo);}}mPhotoList = sortList(mPhotoList);}/*** List按照时间降序排列* @param L* @return*/private List<Photo> sortList(List<Photo> L){SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");Photo temp = new Photo();//冒泡排序，大的时间在数组的前列for(int i=0; i<L.size()-1; i++){for(int j=i+1; j<L.size();j++){String date1=L.get(i).getDate();String date2=L.get(j).getDate();Date d1=sdf.parse(date1,new ParsePosition(0));Date d2=sdf.parse(date2,new ParsePosition(0));boolean flag = d1.before(d2);//flag=true为降序，flag=flase为升序if (flag){temp = L.get(i);L.set(i, L.get(j));L.set(j, temp);}}}return L;}
最后分享一下项目示例代码，需要的可自行下载：
/thread-329-1-1.html
