StorageManagerCompat.java

package com.lody.virtual.helper.compat;

import android.app.Activity;
import android.content.Context;
import android.os.Environment;
import android.os.storage.StorageManager;

import java.lang.reflect.Method;
import java.util.ArrayList;

public class StorageManagerCompat {

    private StorageManagerCompat() {
    }

    public static String[] getAllPoints(Context context) {
        StorageManager manager = (StorageManager)
                context.getSystemService(Activity.STORAGE_SERVICE);
        String[] points = null;
        try {
            Method method = manager.getClass().getMethod("getVolumePaths");
            points = (String[]) method.invoke(manager);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return points;
    }

    public static boolean isMounted(Context context, String point) {
        if (point == null)
            return false;
        StorageManager manager = (StorageManager)
                context.getSystemService(Activity.STORAGE_SERVICE);
        try {
            Method method = manager.getClass().getMethod("getVolumeState", String.class);
            String state = (String) method.invoke(manager, point);
            return Environment.MEDIA_MOUNTED.equals(state);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    public static ArrayList<String> getMountedPoints(Context context) {
        StorageManager manager = (StorageManager)
                context.getSystemService(Activity.STORAGE_SERVICE);
        ArrayList<String> mountedPoints = new ArrayList<String>();
        try {
            Method getVolumePaths = manager.getClass().getMethod("getVolumePaths");
            String[] points = (String[]) getVolumePaths.invoke(manager);
            if (points != null && points.length > 0) {
                Method getVolumeState = manager.getClass().getMethod("getVolumeState", String.class);
                for (String point : points) {
                    String state = (String) getVolumeState.invoke(manager, point);
                    if (Environment.MEDIA_MOUNTED.equals(state))
                        mountedPoints.add(point);
                }
                return mountedPoints;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}