关于ＳＤ卡兼容问题

最新推荐文章于 2024-09-03 18:24:25 发布

萌新小柴鸡

最新推荐文章于 2024-09-03 18:24:25 发布

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分类专栏： android开发文章标签： android

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#最新发现，国内外机型ＳＤ卡路径问题简直时可怕，各种无法兼容，目前根据网上资料

现已修改兼容一下版本:
-4.4,5.0,5.1,6.0版本，其中国内只测国5.1版本的，其他为国外机型，需要自测!

  String currentDir;
  String storagePath;
  //　6.0以上版本进行测试路径
        if (Build.VERSION.SDK_INT >Build.VERSION_CODES.LOLLIPOP_MR1) {
            if (storagePath == null) {
                //内置路径
                currentDir =Environment.getExternalStorageDirectory().getAbsolutePath();
            } else {
                //外置路径
                storagePath=getStoragePath(mActivity, true);
            }
        } else {
        //6.0一下版本
            if ( getPath().equals("/mnt/shell/emulated")) {
                //内置路径
                currentDir =Environment.getExternalStorageDirectory().getAbsolutePath();
            } else {
                storagePath=getPath();
           }
        }



##return 有外置sd卡返回/mnt/media_rw/sdcard1,无外置返回/mnt/shell/emulated!
 public  String getPath() {
        String sdcard_path = null;
        String sd_default = Environment.getExternalStorageDirectory()
                .getAbsolutePath();
        if (sd_default.endsWith("/")) {
            sd_default = sd_default.substring(0, sd_default.length() - 1);
        }
        // 得到路径
        try {
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec("mount");
            InputStream is = proc.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            String line;
            BufferedReader br = new BufferedReader(isr);
            while ((line = br.readLine()) != null) {
                if (line.contains("secure"))
                    continue;
                if (line.contains("asec"))
                    continue;
                if (line.contains("fat") && line.contains("/mnt/")) {
                    String columns[] = line.split(" ");
                    if (columns != null && columns.length > 1) {
                        if (sd_default.trim().equals(columns[1].trim())) {
                            continue;
                        }
                        sdcard_path = columns[1];
                    }
                } else if (line.contains("fuse") && line.contains("/mnt/")) {
                    String columns[] = line.split(" ");
                    if (columns != null && columns.length > 1) {
                        if (sd_default.trim().equals(columns[1].trim())) {
                            continue;
                        }
                        sdcard_path = columns[1];
                    }
                }
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return sdcard_path;
    }


public  String getStoragePath(Context mContext, boolean is_removale) {
        StorageManager mStorageManager = (StorageManager) mContext.getSystemService(Context.STORAGE_SERVICE);
        Class<?> storageVolumeClazz = null;
        try {
            storageVolumeClazz = Class.forName("android.os.storage.StorageVolume");
            Method getVolumeList = mStorageManager.getClass().getMethod("getVolumeList");
            Method getPath = storageVolumeClazz.getMethod("getPath");
            Method isRemovable = storageVolumeClazz.getMethod("isRemovable");
            Object result = getVolumeList.invoke(mStorageManager);
            final int length = Array.getLength(result);
            for (int i = 0; i < length; i++) {
                Object storageVolumeElement = Array.get(result, i);
                String path = (String) getPath.invoke(storageVolumeElement);
                boolean removable = (Boolean) isRemovable.invoke(storageVolumeElement);
                if (is_removale == removable) {
                    return path;
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return null;
    }