android 4.0 取内外置SD卡新特性

最新推荐文章于 2020-12-04 10:42:01 发布

Jack_Zhou888

最新推荐文章于 2020-12-04 10:42:01 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/qq258711519/article/details/8202763

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本文详细介绍了如何在Android应用中获取并检查设备上的SD卡路径及其挂载状态，包括通过StorageManager获取SD卡路径列表，解析路径并判断SD卡是否已挂载。

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private StorageManager mStorageManager = null;

    protected String mSDCardPath = null;
    protected boolean mSDCardMounted = true;
    protected boolean mSDCard2Mounted = false;
    protected String mSDCardPath = null;
    protected String mSDCard2Path = null;

        mStorageManager = (StorageManager)getSystemService(Context.STORAGE_SERVICE);
        String[] storagePathList = mStorageManager.getVolumePaths();
        if (storagePathList != null) {
            Log.d(TAG, "StorgaeList size: " + storagePathList.length);
            if (storagePathList.length >= 2) {
                mSDCardPath = storagePathList[0];
                mSDCard2Path = storagePathList[1];
            } else if (storagePathList.length == 1){
                mSDCardPath = storagePathList[0];
            }
        }

        Log.d(TAG, "SDCard path: " + mSDCardPath); //取出来的/mnt/sdcard
        Log.d(TAG, "SDCard2 path: " + mSDCard2Path);//取出来的应该是/mnt/sdcard

        mSDCardMounted = checkSDCardMount(mSDCardPath);
        mSDCard2Mounted = checkSDCardMount(mSDCard2Path);
        Log.d(TAG, "SDCard state in onCreate: " + mSDCardMounted);
        Log.d(TAG, "SDCard2 state in onCreate: " + mSDCard2Mounted);

    //判断sdcard是否挂载上，返回值为true证明挂载上了，否则不存在
    protected boolean checkSDCardMount(String mountPoint) {
        if(mountPoint == null){
            return false;
        }
        String state = null;
        state = mStorageManager.getVolumeState(mountPoint);
        return Environment.MEDIA_MOUNTED.equals(state);
    }