Util.java

package com.bigfat.splashscreen;

import android.content.Context;
import android.graphics.Bitmap;
import android.text.TextUtils;

import java.io.ByteArrayOutputStream;

/**
 * @author <a href="mailto:fbzhh007@gmail.com">bigfat</a>
 * @since 2015/2/16
 */
public class Util {
    public static Bitmap createSingleColorBitmap(int color, int width, int height) {
        int[] colorArray = new int[width * height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                colorArray[y * width + x] = color;
            }
        }
        return Bitmap.createBitmap(colorArray, width, height, Bitmap.Config.ARGB_8888);
    }

    public static byte[] bmpToByteArray(final Bitmap bmp, final boolean needRecycle) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.PNG, 100, output);
        if (needRecycle) {
            bmp.recycle();
        }

        byte[] result = output.toByteArray();
        try {
            output.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }

    public static String getDeviceInfo(Context context) {
        try {
            org.json.JSONObject json = new org.json.JSONObject();
            android.telephony.TelephonyManager tm = (android.telephony.TelephonyManager) context
                    .getSystemService(Context.TELEPHONY_SERVICE);

            String device_id = tm.getDeviceId();

            android.net.wifi.WifiManager wifi = (android.net.wifi.WifiManager) context.getSystemService(Context.WIFI_SERVICE);

            String mac = wifi.getConnectionInfo().getMacAddress();
            json.put("mac", mac);

            if (TextUtils.isEmpty(device_id)) {
                device_id = mac;
            }

            if (TextUtils.isEmpty(device_id)) {
                device_id = android.provider.Settings.Secure.getString(context.getContentResolver(), android.provider.Settings.Secure.ANDROID_ID);
            }

            json.put("device_id", device_id);

            return json.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}