get system install location

PackageUtils

/**
 * get system install location<br/>
 * can be set by System Menu Setting->Storage->Prefered install location
 * 
 * @return
 * @see {@link IPackageManager#getInstallLocation()}
 */
public static int getInstallLocation() {
	CommandResult commandResult = ShellUtils.execCommand("LD_LIBRARY_PATH=/vendor/lib:/system/lib pm  get-install-location",
														 false, true);
	if (commandResult.result == 0 && commandResult.successMsg != null && commandResult.successMsg.length() > 0) {
		try {
			int location = Integer.parseInt(commandResult.successMsg.substring(0, 1));
			switch (location) {
				case APP_INSTALL_INTERNAL:
					return APP_INSTALL_INTERNAL;
				case APP_INSTALL_EXTERNAL:
					return APP_INSTALL_EXTERNAL;
			}
		} catch (NumberFormatException e) {
			e.printStackTrace();
			Log.e(TAG, "pm get-install-location error");
		}
	}
	return APP_INSTALL_AUTO;
}

the more see: https://github.com/Trinea/android-common/blob/master/src/cn/trinea/android/common/util/PackageUtils.java