如何获得在Android的内部和外部SD卡路径

问题描述

大多数新的Andr​​oid设备有一个内部的SD卡和外部SD卡。我想打一个文件浏览器应用程序，但我不能找出如何让我的应用程序使用，因为

Most of the new android devices have an internal sdcard and an external sdcard. I want to make a file explorer app but I can't find out how to get the path to use in my app because

File file = Environment.getExternalStorageDirectory();

刚刚返回在大多数设备到/ mnt / SD卡但对于其他外部SD卡就像 / 1存放或/存储2 其他路径 。任何帮助AP preciated。

just returns in most device /mnt/sdcardbut there is another path for the other external sdcard like /storage1 or /storage2 . Any help appreciated.

推荐答案

是的。不同的厂商使用不同的SD卡名称，比如三星标签3的extsd，和其他​​三星设备的使用SD卡喜欢这种不同的制造商使用不同的名字。

Yes. Different manufacturer use different SDcard name like in Samsung Tab 3 its extsd, and other samsung devices use sdcard like this different manufacturer use different names.

我有同样的要求，因为你。所以我已经为您创建一个样本为例，从我的项目转到这个链接的Andr​​oid目录选择的例子，它使用androi -dirchooser库。这个例子检测SD卡，并列出所有子文件夹，它也检测设备是否有人数超过1 SD卡。

I had the same requirement as you. so i have created a sample example for you from my project goto this link Android Directory chooser example which uses the androi-dirchooser library. This example detect the SDcard and list all the subfolders and it also detects if the device has morethan one SDcard.

的code部分看起来像这样完整的例子转到这个链接的Andr​​oid目录选择

Part of the code looks like this For full example goto the link Android Directory Chooser

/**
* Returns the path to internal storage ex:- /storage/emulated/0
 *
* @return
 */
private String getInternalDirectoryPath() {
return Environment.getExternalStorageDirectory().getAbsolutePath();
 }

/**
 * Returns the SDcard storage path for samsung ex:- /storage/extSdCard
 *
 * @return
 */
    private String getSDcardDirectoryPath() {
    return System.getenv("SECONDARY_STORAGE");
}


 mSdcardLayout.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {
        String sdCardPath;
        /***
         * Null check because user may click on already selected buton before selecting the folder
         * And mSelectedDir may contain some wrong path like when user confirm dialog and swith back again
         */

        if (mSelectedDir != null && !mSelectedDir.getAbsolutePath().contains(System.getenv("SECONDARY_STORAGE"))) {
            mCurrentInternalPath = mSelectedDir.getAbsolutePath();
        } else {
            mCurrentInternalPath = getInternalDirectoryPath();
        }
        if (mCurrentSDcardPath != null) {
            sdCardPath = mCurrentSDcardPath;
        } else {
            sdCardPath = getSDcardDirectoryPath();
        }
        //When there is only one SDcard
        if (sdCardPath != null) {
            if (!sdCardPath.contains(":")) {
                updateButtonColor(STORAGE_EXTERNAL);
                File dir = new File(sdCardPath);
                changeDirectory(dir);
            } else if (sdCardPath.contains(":")) {
                //Multiple Sdcards show root folder and remove the Internal storage from that.
                updateButtonColor(STORAGE_EXTERNAL);
                File dir = new File("/storage");
                changeDirectory(dir);
            }
        } else {
            //In some unknown scenario at least we can list the root folder
            updateButtonColor(STORAGE_EXTERNAL);
            File dir = new File("/storage");
            changeDirectory(dir);
        }


    }
});

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