android 根据有无sd卡获取存放路径

使用时自行修改文件名

public static String getStorePath(Activity activity){    boolean sdExist = Environment.getExternalStorageState().equals(            Environment.MEDIA_MOUNTED);    String path;    if (sdExist) {        if (activity.getExternalFilesDir(null) != null) {            path = activity.getExternalFilesDir(null).getAbsolutePath()  + "/QQicon.png";          } else {            path = activity.getFilesDir().getAbsolutePath() + "/QQicon.png";        }    } else {        path = activity.getFilesDir().getAbsolutePath() + "/QQicon.png";    }    return path;}