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;
}

希望本文所述对大家Android程序设计有所帮助。

来源：http://blog.csdn.net/wangjicong_215/article/details/76573014