Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.Array;
import java.lang.reflect.Method;

import android.os.Build;

import android.os.storage.StorageManager;

public class Main {
    public static Context applicationContext;
    /**
     * The name of the primary volume (LOLLIPOP).
     */
    private static final String PRIMARY_VOLUME_NAME = "primary";

    /**
     * Get the path of a certain volume.
     *
     * @param volumeId The volume id.
     * @return The path.
     */
    private static String getVolumePath(final String volumeId) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            return null;
        }

        try {
            StorageManager mStorageManager = (StorageManager) applicationContext
                    .getSystemService(Context.STORAGE_SERVICE);

            Class<?> storageVolumeClazz = Class.forName("android.os.storage.StorageVolume");

            Method getVolumeList = mStorageManager.getClass().getMethod("getVolumeList");
            Method getUuid = storageVolumeClazz.getMethod("getUuid");
            Method getPath = storageVolumeClazz.getMethod("getPath");
            Method isPrimary = storageVolumeClazz.getMethod("isPrimary");
            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 uuid = (String) getUuid.invoke(storageVolumeElement);
                Boolean primary = (Boolean) isPrimary.invoke(storageVolumeElement);

                // primary volume?
                if (primary && PRIMARY_VOLUME_NAME.equals(volumeId)) {
                    return (String) getPath.invoke(storageVolumeElement);
                }

                // other volumes?
                if (uuid != null) {
                    if (uuid.equals(volumeId)) {
                        return (String) getPath.invoke(storageVolumeElement);
                    }
                }
            }

            // not found.
            return null;
        } catch (Exception ex) {
            return null;
        }
    }
}