AndroidInfo.java

package cn.ccsu.util;

import android.content.ContentResolver;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;

public final class AndroidInfo {
	private static final String EMULATOR_ID = "ffffffffffffffff";

	public static CharSequence getApplicationLabel(Context context) {
		try {
			PackageManager pm = context.getPackageManager();
			ApplicationInfo ai = pm.getApplicationInfo(
					context.getPackageName(), 0);
			return pm.getApplicationLabel(ai);
		} catch (NameNotFoundException e) {
			return "AnonDroid";
		}
	}

	public static String getApplicationVersion(Context context) {
		try {
			PackageManager pm = context.getPackageManager();
			return pm.getPackageInfo(context.getPackageName(), 0).versionName;
		} catch (NameNotFoundException e) {
			return "";
		}
	}

	public static boolean isOnEmulator(Context context) {
		if ("sdk".equals(Build.MODEL) && "sdk".equals(Build.PRODUCT)) {
			return true;
		}

		return getUniqueDeviceID(context).equals(EMULATOR_ID);
	}

	public static String getDeviceModel() {
		StringBuilder ret = new StringBuilder();

		if ("sdk".equals(Build.MODEL) && "sdk".equals(Build.PRODUCT)) {
			return "SDK Emulator";
		}

		ret.append(Build.MODEL).append(" [");
		ret.append(Build.MANUFACTURER).append(" ");
		ret.append(Build.PRODUCT).append("]");

		return ret.toString();
	}

	public static String getOSVersion() {
		if (Build.VERSION.SDK_INT == Build.VERSION_CODES.CUR_DEVELOPMENT) {
			return "DEV";
		}
		return Build.VERSION.RELEASE;
	}

	public static String getUniqueDeviceID(Context context) {
		ContentResolver contentResolver = context.getContentResolver();
		String id = android.provider.Settings.System.getString(contentResolver,
				android.provider.Settings.System.ANDROID_ID);
		if (id == null) {
			id = EMULATOR_ID; // running on emulator.
		}
		return id;
	}

	/**
	 * Build an HTTP User-Agent suitable enough to identify this application +
	 * version + handset
	 */
	public static String getUserAgent(Context context) {
		StringBuilder ua = new StringBuilder();
		ua.append(AndroidInfo.getApplicationLabel(context)).append("/");
		ua.append(AndroidInfo.getApplicationVersion(context));
		ua.append(" (Android ").append(AndroidInfo.getOSVersion());
		ua.append("/").append(AndroidInfo.getDeviceModel()).append(")");
		return ua.toString();
	}

	private AndroidInfo() {
		/* prevent instantiation */
	}
}