一、获取读取SD卡的权限

二、找到SD卡的目录

/**     * Environment.getExternalStorageDirectory()得到：“、mnt/sdcard” 即找到了sd卡的根目录     */    private String path=Environment.getExternalStorageDirectory()+"client/tile/1.jpg";

三、根据路径获取图片

File mFile=new File(path);        //若该文件存在        if (mFile.exists()) {            Bitmap bitmap=BitmapFactory.decodeFile(path);            return bitmap;        }

注意：

在读取sd卡中图片的过程中的一些可用判断

1、

/**         * Environment.getExternalStorageState()获取路径是否成功         */                 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            String path=Environment.getExternalStorageDirectory().getPath();        }

2、获取SD卡权限成功

private String path=Environment.getExternalStorageDirectory()+"client";    File file=new File(path);if (file.canRead()) {            Log.v("TAG", "可读");        }        if (file.canWrite()) {            Log.v("TAG", "可写");        }