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。

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