Android 7.0开发获取存储设备信息的方法

本文实例讲述了 android 7.0开发获取存储设备信息的方法。分享给大家供大家参考，具体如下：

android 7.0开发相较之前有不少改进，具体可参考前面的文章android7.0版本影响开发的改进分析，这里简单总结一下android 7.0针对存储设备的简单操作方法。

mountpoint

我们通过mountpoint来描述android设备信息

private static class mountpoint {
    string mdescription;
    string mpath;
    boolean misexternal;
    boolean mismounted;
    long mmaxfilesize;
    long mfreespace;
    long mtotalspace;
}

实现mmountpathlist

private final copyonwritearraylist <mountpoint> mmountpathlist = new copyonwritearraylist<mountpoint>();
public void init(context context) {
    mstoragemanager = (storagemanager) context.getsystemservice(context.storage_service);
    final string defaultpath = getdefaultpath();
    logutils.d(tag, "init,defaultpath = " + defaultpath);
    if (!textutils.isempty(defaultpath)) {
      mrootpath = root_path;
    }
    mmountpathlist.clear();
    // check media availability to init mmountpathlist
    storagevolume[] storagevolumelist = mstoragemanager.getvolumelist();
    if (storagevolumelist != null) {
      for (storagevolume volume : storagevolumelist) {
        mountpoint mountpoint = new mountpoint();
        mountpoint.mdescription = volume.getdescription(context);
        mountpoint.mpath = volume.getpath();
        mountpoint.mismounted = ismounted(volume.getpath());
        mountpoint.misexternal = volume.isremovable();
        mountpoint.mmaxfilesize = volume.getmaxfilesize();
        logutils.d(tag, "init,description :" + mountpoint.mdescription + ",path : "
            + mountpoint.mpath + ",ismounted : " + mountpoint.mismounted
            + ",isexternal : " + mountpoint.misexternal + ", mmaxfilesize: " + mountpoint.mmaxfilesize);
        mmountpathlist.add(mountpoint);
      }
    }
    iconmanager.getinstance().init(context, defaultpath + separator);
}

判断是否是外置sdcard

/**
* this method checks weather certain path is external mount path.
*
* @param path path which needs to be checked
* @return true for external mount path, and false for not external mount path
*/
public boolean isexternalmountpath(string path) {
    //logutils.d(tag, "isexternalmountpath ,path =" + path);
    if (path == null) {
      return false;
    }
    for (mountpoint mountpoint : mmountpathlist) {
      if (mountpoint.misexternal && mountpoint.mpath.equals(path)) {
        return true;
      }
    }
    return false;
}

判断内置存储空间

public boolean isinternalmountpath(string path) {
    //logutils.d(tag, "isinternalmountpath ,path =" + path);
    if (path == null) {
      return false;
    }
    for (mountpoint mountpoint : mmountpathlist) {
      if (!mountpoint.misexternal && mountpoint.mpath.equals(path)) {
        return true;
      }
    }
    return false;
}

更多关于android相关内容感兴趣的读者可查看本站专题：《android文件操作技巧汇总》、《android视图view技巧总结》、《android编程之activity操作技巧总结》、《android布局layout技巧总结》、《android开发入门与进阶教程》、《android资源操作技巧汇总》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。