Android获取SD卡根目录下图片

来源：互联网发布：unity3d读取数据库编辑：程序博客网时间：2024/05/17 07:25

1.获取某个目录下图片路径list

[代码]java代码：

01/**
02* Get pictures under directory of strPath
03* @param strPath
04* @return list
05*/
06public List getPictures(final String strPath) {
07  List list = new ArrayList();
08   
09  File file = new File(strPath);
10  File[] files = file.listFiles();
11   
12  if (files == null) {
13      return null;
14  }
15   
16  for(int i = 0; i < files.length; i++) {
17      final File f = files[i];
18      if(f.isFile()) {
19          try{
20              int idx = f.getPath().lastIndexOf(".");
21              if (idx <= 0) {
22                  continue;
23              }
24              String suffix = f.getPath().substring(idx);
25              if (suffix.toLowerCase().equals(".jpg") ||
26                  suffix.toLowerCase().equals(".jpeg") ||
27                  suffix.toLowerCase().equals(".bmp") ||
28                  suffix.toLowerCase().equals(".png") ||
29                  suffix.toLowerCase().equals(".gif") )
30              {
31                  list.add(f.getPath());
32              }
33          } catch(Exception e) {
34              e.printStackTrace();
35          }
36      }
37  }
38   
39  return list;
40}

2.调用上述方法获取sd卡下的图片并显示

[代码]java代码：

01List list = getPictures(Environment.getExternalStorageDirectory() + "");
02if (list != null) {
03    Log.d(TAG, "list.size = " + list.size());
04    for (int i = 0; i < list.size(); i++) {
05        Bitmap bm = BitmapFactory.decodeFile(list.get(i));
06        int top = 30;
07        if (i > 0) {
08            top += BitmapFactory.decodeFile(list.get(i - 1)).getHeight() + 2;
09        }
10        canvas.drawBitmap(bm, 0, top, paint);
11    }
12}
13else {
14    Log.d(TAG, "list is null!!!");